GS Renovation carries out loft conversions across the Royal Borough of Greenwich, from the Georgian streets of SE10 near Greenwich Park to the Victorian terraces of SE7, SE9 and SE18 and the period houses bordering Blackheath in SE3. Consent varies sharply by postcode here, and that is where a project is won or lost.
Heritage constraints in SE10 and SE3
Central Greenwich sits within a World Heritage Site and extensive conservation areas, and a great many buildings around the Maritime Museum and the park are listed. Permitted development for roof extensions does not exist inside a conservation area, so any dormer or mansard is a full planning application to the Royal Borough of Greenwich, and a listed building needs listed building consent as a second, separate approval. Rear dormers that would pass without comment a mile away are routinely refused here.
Where a scheme does go ahead in these streets, it is usually a mansard or a carefully proportioned dormer in slate with lead cheeks and traditional window detailing, designed by a heritage architect. GS Renovation is a contractor and builds to that approved design. Blackheath-facing houses in SE3 come with similar sensitivity, because the roofscape is part of what is protected, so the design conversation happens long before anyone talks about a completion date.
Straightforward conversions in SE7, SE9 and SE18
Away from the protected core, the borough has plenty of ordinary Victorian and Edwardian terraces and interwar semis where a loft is much simpler. On a terrace with a rear closet wing, an L-shaped dormer at an indicative £55,000 to £80,000 gives a bedroom and a shower room. On a hipped semi, hip to gable plus a rear dormer lands in a similar range. A rooflight conversion adding no volume, roughly £30,000 to £45,000, suits roofs that already have generous height.
Building regulations are the same everywhere in the borough regardless of the planning route. Part B requires a protected stair route to a final exit with fire doors and interlinked alarms once the house reaches three storeys, Part K sets the new stair, and the floor is carried on engineer-designed steels bearing on padstones in the party walls. Old tanks come out, usually alongside a switch to a combi boiler or an unvented cylinder, and party wall notices go out before the first cut.
- Water tank removal and conversion to a sealed system
- Dormer cheeks, flat roof and leadwork detailed to last
- Staircase design to Part K, including the landing below
- Insulation between and over rafters to Part L
- En suite plumbing, drainage and mechanical extraction
Why Greenwich Homeowners Choose GS Renovation
Greenwich is two markets inside one borough, and GS Renovation is straight with you about which one your house is in. We coordinate the architect and engineer where heritage consent is needed, build the steel and the dormer where it is not, and see the Royal Borough of Greenwich building control through to sign-off. Fully insured, building control compliant, Companies House no. 14611254.
- Ridge height measured before any design work is commissioned
- Clean, tidy and reliable tradespeople
- Roof type assessed so you get the scheme your house can actually take
- Neighbours given notice before the noisy stages
- Registered in England, Companies House no. 14611254
- Honest updates if a date or a detail has to move