GS Renovation builds loft conversions across Acton, on the bay-fronted Victorian and Edwardian terraces that make up most of W3. Where a house still has its original rear closet wing, an L-shaped dormer is usually the type that returns the most usable room. We coordinate the engineer, build the structure and see Ealing Council building control through to sign-off.
Choosing the right loft type for a W3 terrace
The first measurement that matters is the height from the top of the existing ceiling joists to the underside of the ridge. You want roughly 2.2m to 2.4m for a conversion to work without dropping the ceilings in the bedrooms below or raising the roof, and a good number of Acton terraces have it. Where the original rear closet wing survives, an L-shaped dormer wraps the main rear slope and the wing together, which is how you get a double bedroom plus an en suite rather than one narrow room.
If your ridge height is generous and the budget is tight, a rooflight conversion leaves the roof profile untouched and costs least, roughly £30,000 to £45,000 as an indicative London range for 2026. A plain rear dormer sits in between. Where the house falls inside one of the conservation areas near Ealing Common and a boxy dormer would be refused, a mansard rebuilds the rear slope at a steep pitch, gives the most volume of any option and usually reads better to a planning officer.
Planning and building control with Ealing Council
Loft conversions are frequently permitted development, working to the commonly cited allowance of 40 cubic metres of added volume on a terraced house and 50 on a semi-detached or detached one, with conditions attached: nothing forward of the existing roof plane, materials to match, no verandas or balconies, and side-facing windows obscure glazed and non-opening below 1.7m. Those rights fall away on listed buildings, inside conservation areas, and anywhere Ealing Council has made an Article 4 direction, so nobody should promise you a dormer before your address is checked.
Building regulations apply whether or not planning does. Ealing building control will look for a protected stair route with fire doors and interlinked alarms under Part B, a staircase meeting Part K on rise, going and headroom, and a new floor built on joists sized by a structural engineer and carried on steel, never sat on the old ceiling joists, which were never designed to take a floor. Insulation and ventilation follow Part L. We build to the engineer's design and book each inspection at the right stage.
- Rear dormers to win full head height across the new floor
- Party Wall notices prepared for the building owner to serve
- Staircase design to Part K, including the landing below
- Interlinked mains-powered smoke alarms
- Structural steel sized by the engineer and set on padstones
Trusted Loft Conversion in Acton
Acton homeowners choose GS Renovation because one accountable team runs the whole loft, from the engineer's steelwork and Ealing Council building control to the party wall paperwork, the stair, the en suite and the decoration. Founder Abdelaaziz Saaid brings 30+ years of hands-on structural work to W3 roofs. We are fully insured, quote free with no obligation, and rate 4.9 from 31 MyBuilder reviews.
- One point of contact on the phone, not a call centre
- A written scope and programme agreed before work starts
- Clean, tidy and reliable tradespeople
- Dust screens and floor protection in occupied homes
- Staircase set out to Part K within the space you have
- Roof made good, leadwork and guttering finished properly