GS Renovation converts lofts across the London Borough of Islington, from the Georgian terraces around N1 to the Victorian streets of N5, N7 and N19 and the converted buildings of EC1. Consents drive almost every project here. We coordinate the engineer and the planning drawings, then build the structure and see it through building control.
One borough, several different roofs
Islington is not one type of house. A Georgian townhouse near the Angel usually wants a mansard, because the roof behind the parapet is too shallow for anything else and the neighbouring roofscape already carries them. A Victorian terrace in N7 or N19 with a rear closet wing suits an L-shaped dormer. A flat in an EC1 warehouse conversion is generally not convertible at all without freeholder consent, and often not even then.
Whatever the form, the measurement comes first. You need roughly 2.2m to 2.4m from the existing ceiling joists to the ridge for a conversion to work without lowering ceilings or raising the roof. Indicative London ranges for 2026 run from about £30,000 to £45,000 for a rooflight conversion up to £70,000 to £100,000 or more for a mansard, so the form you choose changes the budget substantially.
Planning and building control with Islington Council
Islington Council has extensive conservation area coverage and a large number of listed buildings, and both remove permitted development rights for loft conversions. Article 4 directions apply in places as well. That makes an early check on your specific address the single most useful thing you can do, because it determines whether you are looking at a straightforward build or a planning application with a design that has to satisfy a conservation officer.
We are a contractor. We do not produce structural calculations or planning drawings ourselves; we bring in the engineer and the designer, then build precisely to what they specify. On site that means steel beams spanning between party walls onto padstones, new floor joists clear of the old ceiling joists, a Part K compliant stair, a protected fire escape route and insulation to Part L, all inspected by Islington Council building control.
- Staircase design to Part K, including the landing below
- Hip to gable conversions on semi-detached and end terrace roofs
- Mansard conversions where planning will not accept a dormer
- Party Wall notices prepared for the building owner to serve
- Water tank removal and conversion to a sealed system
Why Islington Homeowners Choose GS Renovation
Islington homeowners choose GS Renovation because the borough is unforgiving on consents and we treat that as the starting point, not an afterthought. We coordinate the designer and engineer, build the mansard, dormer or rooflight conversion to their design, and carry Islington Council building control to completion. Fully insured, 4.9 from 31 MyBuilder reviews, founder with 30+ years experience.
- Honest updates if a date or a detail has to move
- Free follow-up visit after completion if anything needs attention
- Itemised pricing, so you can see what every stage costs
- Honest answer at survey if your roof will not take a conversion
- Water tank removed and the system converted where it blocks the space
- Waste cleared as we go, not left piled in the garden