Extensions & Loft Conversions in Blackheath
In Blackheath and across Lewisham we are most often asked for side-return and rear extensions on Victorian houses and loft conversions on Edwardian terraces. Brockley, Telegraph Hill, Blackheath and parts of Forest Hill and Sydenham are conservation areas, several with restrictions on windows, roofs and front gardens. Many houses on the hills have stepped gardens, so retaining structures and drainage need thought.
Extensions & Lofts in Blackheath
More house, same address.
Moving in London costs a fortune before you have carried a single box. Extending usually costs less and gets you the room exactly where you need it. We take the job from drawings and approvals to the last coat of paint, with one team and one person to call.

- Single-storey extensionsRear, side-return and wrap-around extensions with flat or pitched roofs, rooflights and wide glazed doors.
- Double-storey extensionsExtra bedrooms and bathrooms above a bigger kitchen, tied properly into the existing house.
- Loft conversionsDormer, hip-to-gable, mansard and rooflight conversions, including the stairs, insulation and fire doors that building control expects.
- Basements & garagesGarage conversions and basement rooms, tanked, insulated and finished as proper living space.
- Planning & building controlWe work with your architect or bring ours, and handle the building control inspections through to the completion certificate.
Local knowledge
Working in Blackheath
Homes in Lewisham
Brockley, New Cross and Telegraph Hill have wide streets of Victorian houses, and Hither Green and Catford contain a large Edwardian estate of terraces built to a consistent pattern. Forest Hill and Sydenham have Victorian villas on hilly roads, Bellingham and Downham are inter-war cottage estates, and Deptford and central Lewisham have new apartment blocks.
Planning and the council
Brockley, Telegraph Hill, Blackheath and parts of Forest Hill and Sydenham are conservation areas, several with restrictions on windows, roofs and front gardens. Many houses on the hills have stepped gardens, so retaining structures and drainage need thought.
Nearby
We also cover Lewisham, Catford, Deptford, New Cross, Brockley, Forest Hill, Sydenham, Hither Green, Lee, Ladywell and Honor Oak.
FAQ
Extensions & Lofts in Blackheath
Not answered here? Call 07595 386864 and ask us directly.
Do you carry out extensions & loft conversions in Blackheath?
Yes. Blackheath is in Lewisham, where we work every week alongside Lewisham, Catford, Deptford and New Cross.
Do I need planning permission for an extension?
Not always. Many single-storey rear extensions and loft conversions fall under permitted development, which has size limits and does not apply to flats, maisonettes or some conservation areas. We check your property at the site visit and tell you which route applies before you spend anything on drawings.
How long does an extension take?
A typical single-storey rear extension takes around 10 to 14 weeks on site once approvals are in place. A loft conversion is usually 8 to 12 weeks. We give you a written programme with the quote so you know what happens each week.
Can we live in the house during the work?
Usually yes. We seal off the working area, keep a kitchen and bathroom running wherever possible, and agree the noisy or dusty days with you in advance.
Also in Blackheath
Other work we do here
Ready when you are.
Tell us about the job in about a minute. We reply within 24 hours with a time for your free site visit.