Home Extension Builders in Victoria
Specialist home extension builders working across Victoria SW1E and SW1W conservation-led design, planning, and construction managed entirely in-house.
Your Local Home Extension
Specialists in
Victoria
Victoria sits at the heart of Westminster, where grand stucco terraces around garden squares
such as Eccleston Square, Warwick Square, and St George's Square give way to large purpose-built
mansion blocks closer to the station and along Buckingham Palace Road. This mix of property
types means extension projects in Victoria look quite different depending on what you're
starting with. Terraced townhouses around the garden squares typically fall within Westminster's
conservation areas, where permitted development is restricted and any rear works need a full
planning application. Mansion block flats, on the other hand, often come with leasehold
restrictions and freeholder consent requirements that shape what's achievable before planning is
even considered. Buildaway's team works through both scenarios regularly and identifies the
right starting point for your specific property.
For the townhouses, the most workable extension routes tend to be at lower-ground level bringing
the rear of the house out into the garden where it's least visible from the street and squares
or adding a mansard roof extension that creates a usable top-floor room within the existing
roofline. Mansard additions are particularly common across Victoria's terraces and, when
designed to match the proportions and materials of neighbouring roofs, tend to fare reasonably
well with Westminster's design officers. Buildaway's architects produce drawings that reflect
this local precedent rather than starting from a blank slate, which generally improves how
smoothly an application progresses.
Where a property is a flat within a converted mansion block, the practical starting point is
usually different. Structural changes affecting the building's exterior or shared elements
require freeholder and often other leaseholders' consent before any planning application is even
submitted, and the scope for adding floor area externally is limited compared to a standalone
townhouse. In these cases, Buildaway focuses on what can genuinely be achieved internal
reconfiguration, loft space within the property's own demise where available, or smaller-scale
additions that fit within lease terms. Getting this assessment right at the start avoids
spending time and money on a design that the building's other stakeholders won't agree to.
Our Home Extension Packages in Victoria
Lower Ground Rear Extension
Ideal for townhouses with garden access at basement level. Includes structural surveys, under-garden excavation or extension, damp proofing, glass rooflights, and structural steel integration to connect with existing lower-ground layouts.
Closet Wing / Infill Extension
Our most popular option for Victoria stucco townhouses. Utilises the rear return wing and courtyard space to create a wider, open-plan kitchen and dining area. Includes party wall notices, heritage-matched brickwork, and slimframe glazing.
Full Townhouse Refurbishment
Complete structural reconfiguration across multiple floors. Includes architectural design, listed building consents where required, floor joist repairs, steel frames, bespoke staircases, new services (heating/electrics), and premium finishes.
Why Victoria Homeowners Choose Buildaway
Local teams trusted across Victoria, Westminster, Belgravia, and Central London
Based in your area with local expertise and reputation.
Bespoke extension designs for luxury apartments, high-end homes, and investment properties
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.
Full project management for a seamless, stress-free experience
Meticulous craftsmanship in every aspect of your extension.
Completed projects near Victoria Station, Buckingham Palace Road, and SW1 postcodes
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 Victoria Clients Say
Real reviews from our satisfied customers.
"We wanted a heritage-sensitive home extension done on our Warwick Square property 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 Listed Building Consent applications smoothly. I could not be happier."
Jackie Brown
Warwick Square, Victoria SW1V
"It was an absolute pleasure working with Cormac and the Buildaway team on our Eccleston Square townhouse extension. Greg is an absolute star. Cormac’s communication and advice was excellent, and the coordination of Westminster permits and highway licences was flawless. A truly great team."
Sim Lewis
Eccleston Square, Victoria SW1V
"Cormac & his team were brilliant throughout our Victoria home extension project. From scoping to completion, Cormac was always responsive, helping us navigate conservation planning and sourcing period-correct materials for our St George's Square townhouse. His team worked extremely hard and a big shoutout to Greg for his attention to detail!"
Georgina Ehmcke
St George's Square, Victoria SW1V
"We’ve had a genuinely fantastic experience with Buildaway. Cormac was ultra responsive and excellent at communicating with us throughout our townhouse refurbishment near Buckingham Palace Road. The quality of the work on our infill extension was excellent - they even thoroughly cleaned all our rooms and touched up any marks. Friendly, reliable and competitive."
Kiran Collier
Buckingham Palace Road, Victoria SW1W
"We recently used Buildaway for a lower-ground extension at our 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
Gillingham Street, Victoria SW1V
"It was a pleasure working with the Buildaway team to design and build our mews house kitchen extension. 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
Eccleston Mews, Victoria SW1X
Frequently Asked Questions
Your questions about home extensions in Victoria, answered.
How much does a home extension cost in Victoria?
Home extensions in Victoria SW1 typically start from £58,000 for a single-storey rear or lower-ground addition, with mansard or larger structural projects ranging from £90,000 to £130,000+. As a central Westminster location, labour rates and material standards run higher than outer London. Buildaway provides a fully itemised quote after a free survey so you know the full cost before any work starts.
Do I need planning permission for a home extension in Victoria?
In most cases, yes. Victoria sits largely within Westminster conservation areas covering the garden squares around Eccleston, Warwick, and St George's, where permitted development rights are restricted or removed. Many buildings are also listed or sit within a listed terrace. Buildaway checks your property's designation early and manages the full application, including Listed Building Consent where needed.
What extension types work for Victoria properties?
Victoria's mix of stucco terraces and large mansion blocks suits rear lower-ground extensions, return wing infills, and mansard roof additions that add a top-floor room without altering the street elevation. For flats within converted mansion blocks, internal reconfiguration is often the more realistic option given freehold and leasehold restrictions. Buildaway assesses each property and its ownership structure before proposing a design.
How long does a home extension take in Victoria?
Planning determination in Victoria typically takes 10–14 weeks, longer where Listed Building Consent is also required. On-site construction for a lower-ground or mansard extension generally runs 14–18 weeks depending on structural complexity. We build a full programme covering planning and construction at the outset, so the overall timeline is clear from the start.
Does Buildaway manage party wall agreements in Victoria?
Yes. Victoria's terraced townhouses and mansion blocks almost always share structural walls with neighbouring properties, so most extension projects trigger the Party Wall Act. Buildaway handles the notice process, liaises with adjoining owners, and coordinates with surveyors where an award is needed all managed alongside the planning and construction programme.
Do you handle both design and construction for Victoria extensions?
Yes the full project runs through Buildaway. Our architects produce drawings that meet Westminster's conservation requirements, our engineers handle structural and party wall calculations, and our trades carry out the build. One team is accountable from initial drawings through to Building Control sign-off, with no handoff to a separate contractor.
Is a home extension in Victoria a good investment?
Victoria's central location keeps demand strong for larger homes and well-configured flats, particularly those with added floor space at lower-ground or mansard level. While planning is more involved than in outer boroughs, a well-executed extension here typically adds significant value given the premium buyers place on extra space in SW1. Buildaway gives an honest view of likely added value during the initial consultation.
We Serve Victoria and Surrounding Areas
Find us in the heart of Victoria. We are proud to serve our local community.
Ready to Transform Your Extension in Victoria?
Buildaway combines expert craftsmanship with stylish design enhancing property value across Victoria and Central London’s most prestigious neighbourhoods.