GS Renovation builds loft conversions across Romford, where interwar semis and later family homes near Raphael Park sit on plots with space to work. RM1 roofs are generally high enough to convert and the permitted development allowances are more generous than in inner London. We coordinate the engineer and carry Havering Council building control to sign-off.
Room to build in RM1
Interwar and postwar Romford houses tend to give you two things inner London terraces do not: a ridge height that comfortably clears the 2.2m to 2.4m you need, and a semi-detached or detached form that carries a 50 cubic metre permitted development volume allowance rather than 40. On a hipped roof, building the hip up into a gable and adding a rear dormer gives you a full width room, an en suite and eaves storage.
Where the roof is already gabled, a rear dormer alone often does the job. Indicative London ranges for 2026 are roughly £45,000 to £65,000 for a rear dormer and £55,000 to £80,000 for hip to gable with a dormer, with an en suite adding £8,000 to £15,000. Space on the plot also means a smoother site: scaffold, skips and materials can usually be handled without closing the road.
Havering Council and the regulations that always apply
Permitted development is common in Romford but never automatic. The conditions have to be satisfied, nothing may project forward of the roof plane on the principal elevation, materials must match, and side facing windows must be obscure glazed. Conservation area designation or an Article 4 direction cancels the rights entirely, so we check the position for your address with Havering Council rather than relying on what a neighbour did five years ago.
Building control sign-off is required even where planning permission is not. Havering building control will inspect the engineer-designed floor structure sitting on steels and padstones, the protected stair route with fire doors and interlinked alarms under Part B, the stair geometry under Part K, and the insulation and ventilation under Part L. On a semi, cutting bearings into the party wall is notifiable, and you serve that notice as the building owner.
- Rooflight conversions where the roof line must not change
- Mansard conversions where planning will not accept a dormer
- Building control inspections booked at floor, steel and completion
- Head height and ridge survey before design
- L-shaped dormers over a rear closet wing
Trusted Loft Conversion in Romford
Romford homeowners choose GS Renovation because we build the whole conversion and hand over the paperwork that proves it was done properly. Engineer coordination, steels, gable, dormer, stair, insulation, en suite and decoration from one team, with Havering Council building control signed off at the end. Fully insured, with free no-obligation quotations and a founder of 30+ years hands-on experience.
- Paperwork and certificates handed over for when you sell
- Building control applications and inspections coordinated for you
- Roof type assessed so you get the scheme your house can actually take
- Ridge height measured before any design work is commissioned
- Structural engineer instructed and coordinated on your behalf
- Party Wall notices prepared for steels bearing into a shared wall