Home Extension Builders in Fitzrovia
Specialist home extension builders working across Fitzrovia W1T roof and rear extensions designed and built entirely in-house.
Your Local Home Extension
Specialists in
Fitzrovia
Fitzrovia sits between Oxford Street and Euston Road, a dense grid of narrow Georgian and
Victorian terraces where shops, restaurants, and offices occupy ground floors beneath
residential upper levels. This mixed-use character shapes how extension projects work here. Much
of the area falls within conservation areas spanning the Charlotte Street and Bedford-Maple
Street districts, and the combination of residential and commercial use within a single building
can complicate how permitted development rules apply to any proposed changes. Buildaway's team
is familiar with this layered planning context and establishes the correct route for each
property before any design work begins.
Given that ground floors in Fitzrovia are typically in commercial use, the most practical
extension routes tend to focus on the upper levels mansard roof additions and loft conversions
that add a habitable room within or above the existing roofline without affecting the shopfront
or office space below. These projects suit Fitzrovia's terraced building stock well, where roof
spaces are often underused and the existing party wall configuration between neighbouring
buildings provides a structural reference point for how a mansard addition can be tied in.
Buildaway's architects design within these established patterns, which tends to result in
proposals that align with what local conservation officers are used to seeing approved.
Construction logistics in Fitzrovia require more thought than in purely residential streets,
since work to the upper floors of a building with an occupied shop or office below needs careful
sequencing to avoid disrupting that business. Scaffold access, material deliveries, and noise
scheduling all need to be planned around the commercial occupier's operating hours, and in some
cases work is phased to minimise impact during busy trading periods. Buildaway manages this
coordination directly, liaising with commercial tenants and freeholders as part of running the
project, so the build proceeds smoothly without creating friction with other occupants of the
building.
Our Home Extension Packages in Fitzrovia
Mansard Roof Extension
The premier route for adding a full additional storey to Fitzrovia's historic buildings. Matches existing roof profiles, features slate cladding, lead-lined dormers, and structural steel framing designed to transfer loads cleanly down party walls while keeping commercial spaces below fully operational.
Loft Conversion
Ideal for terraced flats and townhouses. Maximises underutilised roof spaces with rear dormers or Velux windows. Includes full floor reinforcement, custom staircases matching the original building style, and sound and fire insulation tailored to building control standards.
Rear Upper-Floor Extension
Extends the living space at the back of the property above commercial ground levels. Utilises existing load-bearing structures to build out high-spec kitchen, bathroom, or bedroom space. Includes matching period brickwork, slimline windows, and flat-roof options with glass rooflights.
Why Fitzrovia Homeowners Choose Buildaway
Local expert teams with intricate knowledge of Fitzrovia's W1 and WC1 properties
Based in your area with local expertise and reputation.
Tailored luxury extension designs specifically for elegant Georgian townhomes, stylish flats, and prestigious apartments
We handle everything so you don't have to worry.
Transparent and honest pricing with no hidden fees or unexpected charges.
Clear upfront pricing with no surprises along the way.
Comprehensive project management ensuring minimal disruption
Meticulous craftsmanship in every aspect of your extension.
Established reputation with successful projects around Charlotte Street, Tottenham Court Road, and Fitzroy Square
Professional consultation and detailed quotes at no cost.
What's Included in Your Home Extensions Services
Everything you need for a seamless, stress-free home extension from structure to finish.
Full groundworks and structural build
Complete groundwork preparation and structural construction services.
Plumbing, electrics, and heating integration
Professional installation of all mechanical and electrical systems.
Roofing, windows, and external finish
Complete roofing, window installation and exterior finishing.
Plastering, flooring, and decorating
Professional plastering, flooring and decorating services.
Interior fit-out and finishing
Complete interior fit-out and professional finishing touches.
Project management and schedule control
Professional project management and timeline control throughout.
What Our Fitzrovia Clients Say
Real reviews from our satisfied customers.
"We wanted a heritage-sensitive mansard roof extension done on our property near Charlotte Street and after meeting with several builders, I decided to go with Buildaway. From my first contact with Cormac, I was in good hands. His team turned my vision into reality, communicating with me every step of the way and handled all conservation area requirements smoothly."
Jackie Brown
Charlotte Street, Fitzrovia W1T
"It was an absolute pleasure working with Cormac and the Buildaway team on our Fitzroy Square upper-floor rear extension. Greg is an absolute star. Cormac’s communication and advice was excellent, and the coordination of Camden planning permissions and party wall agreements was flawless. A truly great team."
Sim Lewis
Fitzroy Square, Fitzrovia W1T
"Cormac & his team were brilliant throughout our Fitzrovia loft conversion project. From scoping to completion, Cormac was always responsive, helping us navigate conservation planning and sourcing period-correct materials for our Goodge Street flat. His team worked extremely hard and a big shoutout to Greg for his attention to detail!"
Georgina Ehmcke
Goodge Street, Fitzrovia W1T
"We’ve had a genuinely fantastic experience with Buildaway. Cormac was ultra responsive and excellent at communicating with us throughout our building refurbishment near Great Titchfield Street. The quality of the work on our mansard extension was excellent - they even thoroughly cleaned all our rooms and touched up any marks. Friendly, reliable and competitive."
Kiran Collier
Great Titchfield Street, Fitzrovia W1T
"We recently used Buildaway for an upper-level rear extension at our Warren Street property. From start to finish the experience was smooth and well organised. Cormac was easy to deal with, communication was clear and everything ran to the agreed timelines. The extension looks fantastic and the space feels completely refreshed."
Helen Sivyer
Warren Street, Fitzrovia W1T
"It was a pleasure working with the Buildaway team to design and build our flat's loft extension off Great Portland Street. Cormac's enthusiasm and project management are top-notch. Greg's attention to detail and dedication elevated both the experience and the result. Highly recommended and will certainly work with them again."
Kane Dempsey
Great Portland Street, Fitzrovia W1T
Frequently Asked Questions
Your questions about home extensions in Fitzrovia, answered.
How much does a home extension cost in Fitzrovia?
Home extensions in Fitzrovia W1T typically start from £55,000 for a mansard or rear addition, with larger projects involving structural work to upper floors running £90,000 to £120,000+. Central London labour rates and the complexity of working above occupied commercial units both factor into the cost. Buildaway provides a fully itemised quote after a free site visit so you have a clear figure before committing to any work.
Do I need planning permission for a home extension in Fitzrovia?
Most of Fitzrovia falls within Camden or Westminster conservation areas, including the Charlotte Street and Bedford-Maple Street areas, where permitted development rights are limited. Many buildings combine commercial ground floors with residential upper floors, which can affect what counts as permitted development for the residential element. Buildaway checks your property's specific designation and manages the full planning application.
What types of home extensions suit Fitzrovia properties?
Fitzrovia's narrow Georgian and Victorian terraces, many with commercial units at ground level, tend to suit mansard roof extensions and loft conversions that add space at the top of the building without disrupting the shop or office below. Rear additions at upper floor levels are also possible on properties with suitable rear access. Buildaway assesses the building's layout and any commercial tenancy considerations before proposing a design.
How long does a home extension take in Fitzrovia?
Planning determination in Fitzrovia typically takes 10–14 weeks given the conservation area coverage. On-site construction for a mansard or loft extension generally runs 12–16 weeks, though projects involving structural work above occupied commercial space may need to be phased to limit disruption. We map out a full programme covering planning and construction, including any phasing requirements, at the initial consultation.
Does Buildaway manage party wall agreements in Fitzrovia?
Yes. Fitzrovia's terraced buildings typically share party walls with neighbouring properties on both sides, so roof and upper-floor extensions usually require notices under the Party Wall Act. Buildaway handles the full process serving notices, liaising with adjoining owners, and coordinating with surveyors where an award is needed alongside the planning and construction programme.
Do you handle both design and construction for Fitzrovia extensions?
Yes the full project runs through Buildaway. Our architects produce drawings that meet local conservation requirements, our engineers handle structural calculations for roof and upper-floor work, and our trades carry out the build with minimal disruption to any commercial occupiers below. One team is accountable from initial drawings through to Building Control sign-off.
Is a home extension in Fitzrovia a good investment?
Fitzrovia's central location keeps demand strong for residential space, and a well-executed mansard or loft addition typically adds significant value given how limited extra floor area is in this part of London. Buildaway gives an honest assessment of likely added value during the initial consultation, based on the property type and what the local market supports.
We Serve Fitzrovia and Surrounding Areas
Find us in the heart of Fitzrovia. We are proud to serve our local community.
Nearby Areas We Serve
Below are some of the local areas where you can find Buildaway transforming homes.
Ready to Transform Your Extension in Fitzrovia?
From sophisticated contemporary wet rooms to luxurious traditional extensions, Buildaway delivers flawless, bespoke installations to elevate every home in Fitzrovia.