Extensions in London
An extension is one of the best ways to gain space without moving. We build single and double-storey extensions – from side returns on Victorian terraces to open-plan kitchen extensions – working to your architect’s drawings from foundations to finishes.
What’s included
- Single-storey rear and side-return extensions
- Wraparound and double-storey extensions
- Foundations, steelwork and structural openings
- Roofing, rooflights and glazed doors
- Underfloor heating, kitchens and interior finishing
- Liaison with your architect, engineer and Building Control
Done properly, every time
Built to the drawings
We work closely with your architect and structural engineer, so what’s built matches what was designed and approved.
Weathertight quickly
The structure and roof are programmed to get the extension watertight early, protecting the rest of your home.
Finished inside too
Because we also do interiors, your extension is handed over plastered, floored and decorated – not as a shell.
What affects the cost of extensions in London?
Every home is different, so we price each job individually after a free site visit. These are the main things that shape your quote:
- The size of the extension and the number of storeys
- Foundations, steelwork and ground conditions
- Glazing, rooflights and the type of roof
- The kitchen, flooring and interior finishes
- Party wall, planning and Building Control requirements
Questions about extensions
Do I need planning permission for an extension?
Not always. Many single-storey rear extensions can be built under permitted development, but the limits depend on your property type, any previous extensions and the location – conservation areas, listed buildings, flats and Article 4 areas have different rules. We’ll advise on your property and work with your architect if planning permission is needed.
Will I need a party wall agreement?
If you’re building on or near a shared boundary, or digging foundations close to a neighbour’s property, the Party Wall etc. Act 1996 is likely to apply. You’ll need to serve notice on your neighbours before work starts, and we’ll explain the process early so it doesn’t delay your build.
How long does an extension take to build?
Most single-storey extensions take around three to four months from breaking ground to completion, depending on size, complexity and the finishes you choose.
Extensions across London
We work in all 32 London boroughs and the City. Choose your area to see the neighbourhoods and postcodes we cover.
- Central LondonBelgravia, Bloomsbury, Chelsea, Clerkenwell, Covent Garden and more
- North LondonCrouch End, Edgware, Enfield Town, Finchley, Golders Green and more
- East LondonBethnal Green, Bow, Canary Wharf, Dalston, Hackney and more
- South East LondonBeckenham, Bermondsey, Bexleyheath, Blackheath, Brockley and more
- South West LondonBalham, Battersea, Brixton, Clapham, Croydon and more
- West LondonActon, Brentford, Chiswick, Ealing, Fulham and more
Other services
Interiors
- 3D wall printingNew in LondonPhoto-quality murals printed straight onto your wall with a vertical UV printer – seamless, sharp and cured the moment they’re printed.
- Feature walls & 3D panelsOur specialitySculpted 3D wall panels, media walls and statement finishes that give a room real presence.
- Painting & decoratingInterior and exterior painting, wallpapering and murals, with the preparation that makes a finish last.
- Plastering & renderingSkimming, re-plastering, boarding and external render for surfaces that are smooth, straight and ready to decorate.
- Full renovationsComplete house and flat renovations, managed from the first strip-out to the final coat of paint.
- Kitchen installationsKitchen fitting from first fix to final trim – units, worktops, tiling, appliances and lighting.
- Bathroom installationsBathrooms, en suites and wet rooms – fully waterproofed, beautifully tiled and finished with care.
- FlooringTiles, laminate and wood flooring, laid flat and finished neatly on a properly prepared subfloor.
Building and outdoor
- Loft conversionsDormer, hip-to-gable, mansard and rooflight conversions that turn unused space into beautiful rooms.
- Fencing & deckingFences, gates and decking built square, level and made to last outdoors.
- Garden structuresPergolas, gazebos and verandas that make the garden an extension of the home.
- General building workBrickwork, repairs, alterations and the smaller jobs that still deserve to be done properly.
Get a quote for extensions
Send a few details and we’ll arrange a free site visit and a clear, itemised quote – with no obligation.
Covering all of London
Thank you – your enquiry has been sent.
We’ll be in touch to arrange your free, no-obligation quote. If it’s urgent, call us on 07949 238390.