Across Our Sites: Progress From Three Major London Projects

Posted on ZXCZXC7 October 20267 October 2026 by FJDigital

Latest progress from our major London projects in Holland Park, St John’s Wood and Ealing, as major structural works give way to the next stages of construction.

Work continues at pace across several of our current residential projects in London, with significant progress being made in Holland Park, St John’s Wood and Ealing.

Each project presents its own technical challenges, from substantial basement and structural works through to complex extensions and high-end internal fit-outs. As these schemes move beyond some of their major structural stages, attention is increasingly turning towards the internal spaces and the details that will define the finished homes.

Here, we take a look at the latest progress across three of our ongoing projects.

Holland Park: Preparing for the Internal Works

Since our last update from Holland Park, the project has progressed significantly, with the team now finishing the new roofs and completing the remaining structural works across the property.

The basement has been fully waterproofed, marking another major stage in the programme, while work to the new roof structures is nearing completion.

With these substantial elements of the build almost complete, preparations are now underway for the internal works to begin. This will mark an important transition for the project as the focus moves from the major structural stages towards creating the new spaces and interiors within the home.

You can read our previous Holland Park project update to see how the project has progressed from its earlier stages.

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St John’s Wood: Extension and Internal Works Progress

Our substantial basement and extension project in St John’s Wood has also reached another important stage.

Previous phases focused heavily on excavation, underpinning and the complex structural engineering required to create the new basement beneath the existing property. With much of this work now complete, progress is becoming increasingly visible both inside the property and above the new basement structure.

Construction of the extension above the basement is now underway, adding another major element to the new layout of the home.

Internally, work is progressing across the property, including the installation of the underfloor heating system. These works form an important part of the transition towards the internal fit-out as the property begins to move closer to its finished form.

The project continues to demonstrate the careful sequencing required when combining extensive below-ground construction, alterations to an existing property and the creation of substantial new living space.

Read our previous St John’s Wood update for a closer look at the structural work completed earlier in the programme.

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Ealing: Glazing Complete and Flooring Underway

There has also been considerable progress at our Ealing project, where we are transforming a large Victorian property into a highly efficient, low-carbon family home.

Earlier stages of the project centred around major structural alterations, including a new basement beneath the existing property, a large rear extension, a new roof structure and extensive changes throughout the original house.

The project has now moved much further into the internal phase. Glazing has been installed throughout, helping to enclose the property and bringing the architectural design of the new and extended spaces into much sharper focus.

Flooring installation has also begun as work continues across the interiors. With the main structure established and more of the finishes now being introduced, the character of the completed home is becoming increasingly apparent.

Take a look at our previous Ealing project update to see the scale of the structural work that preceded this latest stage.

Delivering Complex Residential Projects Across London

Although each of these projects is at a different point in its programme, all three demonstrate the breadth of work involved in delivering substantial residential transformations in London.

From basement construction and waterproofing through to structural alterations, extensions, building services and high-end internal finishes, our team works closely with architects, consultants and specialist contractors throughout every stage of the build.

As Holland Park, St John’s Wood and Ealing continue to progress, we look forward to sharing more from each project as the internal spaces develop and the finished homes begin to emerge.

Explore more of our latest news and project updates or get in touch to discuss an upcoming residential project with our team.

Work Begins on Major New Project in Holland Park

Posted on ZXCZXC3 September 20263 September 2026 by FJDigital

Harris Calnan starts on site for a substantial structural transformation in one of West London’s premier addresses, Holland Park.

We’re pleased to announce that we’ve started work on an exciting new project in Holland Park, one of West London’s most sought-after residential addresses. The scheme goes well beyond the below-ground works: we’re replacing the existing roof structure entirely and carrying out significant structural intervention throughout the building. We’ve brought together a highly experienced professional team for the job, reflecting the scale and technical complexity we’ve come to be known for.

As we do on many of our basement developments, we’re focusing the early stages of the programme on the groundwork that underpins everything that follows: waterproofing, temporary support and the careful sequencing we need to build a new structure safely alongside an existing one.

Basement Waterproofing

We’re carrying out waterproofing using the Newton Waterproofing System, a specialist Type C cavity drainage approach widely regarded as one of the most reliable methods for protecting below-ground living space. Getting this stage right is fundamental to the long-term performance of any basement, and it’s an area where our experience on previous basement projects continues to prove invaluable.

Temporary Propping and Structural Sequencing

Alongside the waterproofing package, we’ve installed a comprehensive temporary propping scheme to support the existing structure while we build the new basement and superstructure around it. This is a critical and often unseen stage of any basement project, and it demands close coordination between our site teams and the structural design to keep the existing building safe and stable throughout construction.

Brickwork and Structural Steel

As the project progresses, we’ll move on to the brickwork for the new structure, along with installing structural steelwork and floor joisting to form the building’s new floors. Together, these packages will start to define the shape and scale of the finished building, setting the stage for the fit-out phases to follow.

Working With a Trusted Team

Delivering a project of this complexity relies on close collaboration across the full professional team. We’re working alongside architects and Lead Consultant Flower Michelin, with structural engineering delivered by Duffy Associates and building services engineering provided by Edward Pearce. Quantity surveying and contract administration duties are being led by Stockdale.

This strength in depth across the design and consultant team reflects the calibre of project we continue to be trusted with, and the relationships we’ve built with fellow professionals across London’s high-end residential sector.

We look forward to sharing further updates as the Holland Park project progresses. In the meantime, you can see more of our current and completed basement and new build schemes on our news page.

St John’s Wood Basement & Extension Project Progress Update

Posted on ZXCZXC28 July 202628 July 2026 by FJDigital

Structural Milestone Reached

Our latest progress update video showcases how our ongoing St John’s Wood basement and extension project continues to move forward, with another major structural milestone now complete. Following months of carefully planned excavation, underpinning and basement construction, the project is now transitioning into the next exciting phase as the permanent structure begins to take shape.

Working alongside an experienced team of consultants and specialists, we’re continuing to deliver this complex residential project with precision, careful planning and close attention to detail.

Moving Beyond the Basement Structure

When we last shared an update, the team had successfully completed the extensive underpinning works and excavation required to create the new basement structure.

Since then, significant progress has been made across the site. One of the most important stages has been the installation of the permanent structural elements that will ultimately support the existing property as construction continues.

Throughout these works, the original house has remained safely supported by an engineered temporary structure. This carefully designed solution has allowed construction to continue while protecting the integrity of the existing building during one of the most technically demanding stages of the project.

Collaborative Structural Engineering

Projects of this complexity rely on close collaboration between multiple specialists. The temporary support system and permanent structural solution have been developed in partnership with Malci, Richard Tant Associates, and Architecture for London, ensuring every stage of construction is carefully engineered before work begins on site.

With the permanent structure now installed, the next step will see the construction of the new concrete deck, allowing the team to begin opening up the internal spaces and preparing the property for the next phase of the build.

Elsewhere on the project, screw piles have now been installed to support a new external deck structure.

Once the project is complete, this area will become home to a bespoke sauna, adding another premium feature to this extensive residential renovation. During construction, however, the deck will provide a practical temporary solution by relocating the site’s welfare facilities outside of the house.

Moving the welfare accommodation away from the existing building will allow our team to fully focus on the internal construction works as the project progresses into its next stage.

Building Out the Extension

With the major structural works nearing completion, attention will now turn towards continuing the masonry works, constructing the new extension and gradually transforming the structure into a finished home.

As the external envelope develops, internal fit-out works will begin to gather pace, marking a significant shift from heavy structural engineering towards the craftsmanship and finishing stages of the project.

This transition represents another key milestone in what has been a highly technical build requiring careful sequencing, specialist engineering and close collaboration between the wider project team.

Follow the Project as it Progresses

We’ll continue to share updates as work progresses on this exciting St John’s Wood project, showcasing each stage of the build from complex structural engineering through to the final high-end interior fit-out.

Be sure to check back for future progress updates as the project continues to evolve or check our news page to see what else we’ve been up to!

Regent’s Park Grade I Listed Renovation

Posted on ZXCZXC3 April 20263 April 2026 by FJDigital

High-End Internal Fit Out by Harris Calnan

The team here at Harris Calnan have successfully completed a high-end renovation of a Grade I listed property in Regent’s Park, delivering a full internal fit out with exceptional attention to detail throughout.

Working within one of London’s most prestigious and historically significant locations, this project required a careful balance between preserving original character and introducing a refined, modern finish suitable for contemporary living.

A Complete Internal Transformation in Regent’s Park

This project involved a full internal fit out across the entire property, reconfiguring and upgrading the interior to meet the highest standards.

Every space has been thoughtfully executed to enhance both functionality and flow. From the initial strip out through to final finishes, the focus remained on quality, precision, and consistency.

The result is a home that feels cohesive throughout, with each room complementing the next while maintaining its own identity.

Working Within a Grade I Listed Property

Carrying out works within a Grade I listed building presents a unique set of challenges. Every decision must respect the architectural significance of the property.

Our team worked closely with the appointed architects, Flower Michelin Architects, to ensure all elements aligned with heritage requirements while still achieving a high-end finish. This approach allowed us to retain key period features such as original cornicing, fireplaces and proportions, while upgrading the property to modern standards behind the scenes. The interiors showcase a consistent level of craftsmanship across every space.

Key features include:

Bespoke joinery integrated seamlessly into living areas and bedrooms
Natural stone surfaces across bathrooms and kitchen spaces
Carefully selected lighting to enhance both mood and functionality
A neutral material palette that allows textures and detailing to stand out

The bathrooms feature freestanding baths, marble finishes and clean detailing, creating calm and refined spaces. Living areas combine darker tones with softer furnishings, adding depth and contrast while maintaining a cohesive overall feel.

While the property retains its historic character, the layout and finishes have been tailored for modern day use. Open, connected living spaces improve usability, while bespoke storage solutions maximise practicality without compromising on design. Natural light plays a key role throughout the property, with large windows and considered layouts helping to create bright, welcoming interiors.

Collaborative Approach to Delivery

This project was delivered in collaboration with Flower Michelin Architects & White & Lloyd. Working closely with both teams ensured a smooth process from concept through to completion. Clear communication and coordination allowed every detail to be executed to the highest standard.

Looking to Start a High-End Renovation Project?

If you are planning a high-end renovation or listed property refurbishment in London, Harris Calnan can support you from concept through to completion.

Explore our full range of services or get in touch with the team to discuss your project.

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Hosting Architecture for London at our St John’s Wood project

Posted on ZXCZXC30 March 202630 March 2026 by FJDigital

A key milestone marked with a full team site walkthrough as the structure begins to emerge

Our team was pleased to host the team from Architecture for London at our ongoing site in St John’s Wood. The team joined us for a detailed walkthrough of the project’s progress. With everyone arriving bright and early, it was a great opportunity to bring together the wider project team. Together, we were able to share a closer look at the work completed to date.

The visit came at a significant stage in the build, with the basement now fully excavated following several months of complex groundworks. Delivered in collaboration with Malci and Quorum Consulting Engineers, this phase has been a major part of the programme, and seeing the scale of the excavation in person really emphasised the level of coordination and precision involved.

With the structural design by Richard Tant Associates now beginning to take shape on site, the early form of the new home is becoming visible. Walking the team through this stage alongside our clients created a real sense of momentum, marking a turning point in the project as it transitions from groundworks into the build phase. It felt like a milestone moment, similar to a topping out, just experienced in reverse.

Architecture For London On Site:

Moments like this highlight the importance of collaboration across the full project team. Bringing architects, engineers, contractors and clients together on site not only reinforces the shared vision for the project, but also provides a valuable opportunity to reflect on progress and align on the next stages.

With the sun out and strong progress being made, it was a great reminder of why the work behind the scenes matters. We look forward to continuing to share updates as this exciting project develops further.

To see more of our work, visit our projects page and stay tuned for further updates as this build continues to progress.

Understanding the Complexities of High-End Refurbishments

Posted on ZXCZXC24 February 202624 February 2026 by FJDigital

The Realities Behind Luxury Renovation Projects

High-end refurbishments often appear seamless once complete. Refined finishes and carefully resolved spaces rarely reveal the complexity behind them. In practice, these schemes demand extensive coordination, technical understanding and adaptability throughout the project lifecycle.

Working within an existing structure presents one of the most significant challenges. Buildings often evolve through decades of alteration, repair and extension. Teams must investigate thoroughly to understand constraints before major works begin. Early surveys and exploratory opening-up works help establish reliable information and reduce uncertainty during delivery.

These early stages form the foundation of many High-End Renovation Projects, where informed decision-making supports both programme stability and quality outcomes.

Successful renovation also relies on close collaboration across disciplines. Architects, engineers, specialist subcontractors and suppliers must operate in alignment while works progress on site. This collaborative approach reflects industry guidance from organisations such as RIBA, which emphasises integrated project teams in complex building environments.

Sequencing plays a central role in refurbishment delivery. Structural alterations, temporary works and enabling packages often occur long before visible transformation takes place. Teams must plan these stages carefully to protect retained fabric while creating safe conditions for subsequent construction activity. On constrained urban sites, this coordination becomes even more critical.

This structured approach is evident across projects such as the Tottenham Heritage Restoration Project, where phased structural works enabled new interventions while safeguarding historic elements.

As construction progresses, balancing design intent with buildability becomes an ongoing process. Existing structures rarely offer perfect tolerances. Material junctions and bespoke detailing therefore require continuous refinement. Close dialogue between design and construction teams supports practical solutions that maintain the architectural vision.

Renovation projects also involve a degree of discovery. Opening up existing fabric can reveal unforeseen structural conditions or legacy installations. Project teams must assess these findings quickly and implement appropriate responses. A proactive and solution-focused mindset allows progress to continue without undermining the wider scheme objectives.

Guidance from bodies such as CIOB, highlights the importance of risk management and professional judgement when delivering complex construction projects within existing buildings.

Ultimately, high-end renovation projects represent a coordinated effort shaped by investigation, planning and collaboration. The finished environment may convey simplicity and calm, yet it sits upon a layered process that brings together expertise from multiple disciplines. Through this approach, existing buildings can evolve to meet contemporary requirements while retaining the character that defines them.

Ealing Residential Redevelopment – Project Progress Update

Posted on ZXCZXC22 January 202623 January 2026 by FJDigital

Basement and Roof Milestones Mark Major Progress on this Complex Ealing Redevelopment

Works are continuing at pace on our major residential redevelopment project in Ealing, with significant milestones now reached both above and below ground.

This carefully planned scheme involves the full strip-out of the existing house and the construction of a new basement beneath the original footprint. Additionally, we will complete a rear extension, extensive structural alterations and a complete high-end internal fit out. Alongside the architectural transformation, the project has been designed with a strong focus on low-carbon performance and long-term energy efficiency.

Basement Structure Nearing Completion

One of the most complex phases of the build is now approaching completion, with the new basement structure largely formed beneath the existing property. We have carried out extensive structural works to safely create the additional level, providing valuable new living space while maintaining the integrity of the original house above.

A standout feature at this stage is the bespoke staircase which now links the basement seamlessly to the rest of the home. Designed as both a functional and architectural element, the staircase integrates seamlessly into the structure and plays a key role in how the new spaces connect and flow once the project is complete.

New Roof Structure In Place

Above ground, the project has reached another major milestone with the new roof structure now installed. The framing is complete and clearly defines the updated form of the house, marking a visible step forward in the transformation of the property.

With the roof structure in place, the building is beginning to take its final shape, allowing the project to move confidently into the next stages of construction and internal works.

With the roof structure now established, the building envelope is beginning to close in, providing a clear platform for the next phases of the programme. This stage allows greater coordination of follow-on trades and supports the smooth transition into weatherproofing, services installation and internal fit out as the project continues to progress.

Sustainable Systems and High-End Finish

Sustainability is a core part of this redevelopment. The house will benefit from a ground source heat pump and a low-carbon, high-efficiency design approach throughout. This will support long-term energy performance without compromising on comfort or quality.

As the structural phases conclude, focus will continue to shift towards the high-end fit out, where detailing, materials and craftsmanship will define the finished home.

Collaborative Delivery

This project is being delivered in collaboration with Beasley Dickson Architects, whose considered design has guided the transformation of the property. Additionally, Foster Structures have supported the complex structural requirements of both the basement and superstructure works.

To see more of our recently completed projects with a similar scope, please click here.

Why Choosing the Right Principal Contractor Defines Your Renovation Outcome

Posted on ZXCZXC5 December 20255 December 2025 by FJDigital

When you invest in a high end renovation you are not just choosing new materials or layouts, you are choosing the team who will bring your vision to life. The quality of your principal contractor defines how smoothly your build runs, how well the design is protected and how exceptional the final finish will be.

Understanding the Role of the Principal Contractor

A principal contractor is the central link between the design stage and the physical build. Their responsibility is to keep every moving part aligned so the project progresses with confidence and clarity. For homeowners this often means far more than people realise.

A strong principal contractor will:

Coordinate architects, designers, engineers and specialist trades
Manage timelines and budgets with accuracy and transparency
Oversee quality control at every phase of the build
Maintain safety, compliance and clear communication
Protect the design intent so the final home reflects the vision agreed at the outset
Anticipate challenges before they disrupt progress

For more information about a principal contractor’s responsibilities, click here.

How Harris Calnan Safeguard Quality

Every renovation carries its own challenges. At Harris Calnan we take pride in delivering work that balances architectural ambition with technical precision.

Our long-standing relationships with skilled subcontractors ensure consistency from the first day on site to the final handover. Our team understand the importance of detail whether that is structural accuracy, specialist materials or bespoke elements crafted to fit the design perfectly.

We keep clients informed through every stage of a project and work closely with architects and designers so the vision remains intact throughout the build.

For information about how we work, click here.

Examples of Coordinated Craftsmanship

Many of the projects we deliver involve complex reconfigurations, heritage structures and high performance building systems. In recent renovations we have managed everything from full structural changes to complete interior rebuilds where bespoke joinery, mechanical systems and refined finishes had to work together seamlessly.

Our role as principal contractor is to ensure that every contributor to the project is aligned and that the quality remains consistent from groundwork to decoration.

Advice for homeowners choosing a principal contractor

Selecting the right principal contractor can feel daunting but there are simple steps that help you make an informed choice.

You should consider:

How transparent the contractor is with programme and budget
Whether they can demonstrate quality through past work
How they communicate changes or technical issues
Their experience with the level of finish you expect
How early they recommend being involved in the design process

Early contractor involvement can resolve technical challenges before construction begins which improves efficiency and supports the intended design outcome.

Building Your Home With Confidence

A high end renovation demands a principal contractor who brings skill, care and coordination to every stage of the build. At Harris Calnan we combine technical expertise with a commitment to craftsmanship so each project is delivered to the standard clients expect.

If you are planning a renovation and would like to discuss how our team can support your vision we would be pleased to hear from you.

Project Walkthrough: St John’s Wood, Low Carbon Renovation

Posted on ZXCZXC3 October 20253 October 2025 by FJDigital

We are pleased to share a video walkthrough of the early stages of our latest St John’s Wood renovation, delivered in collaboration with Architecture for London. Click on the video to learn more about this fantastic project.

The walkthrough shows the substantial temporary works now in place. We’ve installed steels and supports to extend the ground floor and secure the structure. This careful preparation allows excavation of the new basement to begin safely and efficiently.

This renovation will transform the existing house with a full strip out, a lowered and extended basement, and a high end fit out. Every stage of the build is guided by a low carbon, high efficiency approach, ensuring the finished home will be both elegant and sustainable.

Although the project is still at an early stage, the walkthrough highlights the scale of the work involved and the precision required. It offers an inside look at how complex residential projects are carefully managed from the very start.

We will continue to share updates as the project develops, giving further insight into each stage of this St John’s Wood renovation.

To see some of our finished finished projects, click here.

foundation works for substantial basement structure

Collaboration at the Heart of Tottenham’s Heritage Restoration

Posted on ZXCZXC9 September 20259 September 2025 by FJDigital

At Tottenham High Road, our heritage restoration of the Grade II* listed buildings continues to progress with care and precision. These historic properties, dating back to 1725, demand not only technical expertise but also collaboration across multiple disciplines.

Specialists work together at every stage of this project to ensure the right balance between restoration and modern use.. From heritage conservation experts to the architects leading the design, each partner plays a crucial role in safeguarding the history of these buildings while shaping their future.

In a recent walkthrough, conservation specialist Nathan Goss shared how every decision is taken with sensitivity to the fabric of the buildings. From carefully repairing historic lime plaster ceilings to reinstating centuries-old timber, his expertise ensures that original details are preserved wherever possible.

The architectural team, F3 Architects, also highlighted the delicate balance required to merge historic character with contemporary interventions. With new basement spaces and a planned ground floor extension set to introduce a café and gallery, their design approach respects the heritage context while preparing the buildings for new community use.

By working closely together, the project team is ensuring that the historic significance of these landmark properties is not only protected but enhanced for future generations.

To learn more about this fantastic heritage restoration project, click here.