Loft Conversion Builders in Fulham (SW6)
Professional loft conversion builders in Fulham, South West London.
Why Choose All Well for Loft Conversions in Fulham?
Fulham's Victorian terraces have good roof structures for loft conversions, and the property values in SW6 mean the return on investment is excellent. Adding a bedroom with en-suite to a Fulham terrace typically adds £120,000-£180,000 in value for a build cost of £55,000-£70,000. We build L-shaped dormers on the larger terraces that create a genuine master suite — bedroom, en-suite, and dressing area — that rivals the best rooms in the house.
Every project comes with a fixed-price contract, single project manager, and full certification including Building Control sign-off.
Loft Conversions for Fulham Properties
Fulham is known for its victorian terraces, edwardian mansion flats, riverside developments. Our loft conversions services are tailored to these property types, ensuring results that complement the character of your home.
Postcodes we cover: SW6
Loft Conversions Tip for Fulham Homeowners
The conservation areas in Fulham restrict dormer design more than in some other boroughs — Hammersmith and Fulham Council expects dormers to be subordinate to the existing roof, clad in materials that match the original covering, and set well back from the front elevation. We work within these constraints to maximise internal space without triggering a planning refusal. For non-conservation properties, permitted development rules provide more flexibility on dormer size and materials.
What a Fulham loft conversion typically covers
Three patterns cover most of what we build in SW6. L-shaped dormer on a wider Victorian terrace is the most common Fulham project. The Victorian terraces along Munster Road, Bishops Road, and the streets towards Bishops Park have steep cut-roof pitches and reasonable back-addition footprints. Combining a rear dormer with a side dormer over the back addition creates 25-32 square metres of usable floor space — typically a master suite with bedroom, en-suite, and dressing area. Cost is £60,000-£90,000 including structure, staircase, en-suite plumbing, electrics, plastering, and decoration. Build time 12-14 weeks. The party wall mechanics involve both neighbours because the side dormer crosses the party wall. Rear dormer on a narrower Victorian terrace near Fulham Broadway and the streets towards Parsons Green is the second pattern. Cut-roof Victorian construction with 2.4-2.5 metres at the ridge. A rear dormer creates a master bedroom with en-suite within the existing roofline. Cost is £52,000-£75,000. Build time 10-12 weeks. The 40 cubic metre Class B terraced allowance applies under permitted development. Mansard conversion on properties where rear dormers are restricted is the third pattern. The existing roof structure is largely rebuilt with a near-vertical rear slope and a small flat roof at the top. Mansards always need full planning because they change the roof profile. Cost is £85,000-£130,000. Build time 16-20 weeks including consent. Note on mansion blocks: top-floor flats in the Edwardian mansion blocks near Fulham Broadway and along Fulham Road usually cannot have a loft conversion. The roof structure is shared building fabric, the lease typically prohibits structural roof alterations, and the freeholder rarely consents. We confirm at the survey and clarify scope rather than quoting work that can't be delivered.
Hammersmith and Fulham conservation areas, dormer design, and mansion-block lofts
Three Fulham factors define the planning approach on most loft conversions. Extensive conservation areas. Hammersmith and Fulham Council has extensive conservation areas across Fulham — Fulham Park Gardens, Studdridge Street, Hurlingham, Munster Road, Bishops Park, and several others. Within all of these, dormer designs need conservation officer review and the council expects dormers to be subordinate to the existing roof, clad in materials that match the original covering (typically slate on Victorian terraces), and set well back from the front elevation. Front-facing dormers are virtually never approved. The council publishes detailed design guidance and our submitted designs typically get approved without revisions because we work within the published parameters. Dormer design rules. Within conservation areas, rear dormers must sit well below the existing ridge (typically 500mm or more, stricter than the standard 300mm), set back from the eaves by 300mm or more, and not exceed 60-70 percent of the rear roof slope width. Materials must match the existing — Welsh slate is common, with lead flashing throughout. Side-facing dormer windows to habitable rooms must be obscure-glazed and fixed shut up to 1.7 metres above floor level under the General Permitted Development Order. Mansion-block flat lofts usually impossible. The Edwardian mansion blocks near Fulham Broadway and along Fulham Road have shared roof structures and leasehold structures that typically prohibit loft conversion. Even where the lease permits structural alteration, Section 20 freeholder consent and Licence to Alter would be required, and freeholders rarely approve loft conversions because they affect the building's shared roof and weather envelope. For top-floor mansion-block flats, the achievable scope is usually limited to skylight upgrades or roof terrace creation under separate planning consent — not a habitable loft conversion. We clarify scope at the survey rather than quoting work that can't be delivered.
Hammersmith and Fulham process and project management
Fulham falls under Hammersmith and Fulham Council. Permitted development under Class B covers loft conversions on non-conservation properties within volume limits — 40 cubic metres for terraced and 50 cubic metres for semi-detached or detached. We submit a Lawful Development Certificate (£103, 6-8 weeks at Hammersmith and Fulham) on permitted development projects. For conservation area projects, full planning at £206 applies and the council typically determines applications in 8-12 weeks. Mansards always need full planning because the roof profile changes. A Fulham loft conversion involves 9-13 trades over 10-20 weeks (longer for mansards): structural steel install, joist and floor structure, dormer or mansard carcassing, brick build-up matched to existing London stock, slate roofing with lead flashing matched to the existing covering, Velux rooflights and FENSA-registered casement windows (with traditional sash or casement profiles in conservation areas), insulation (150mm PIR between rafters plus 50mm under to U-value 0.18 W/m²K under Building Regulations Part L), staircase joinery, plastering, NICEIC electrics (BS 7671), en-suite plumbing, decoration. We assign one project manager from survey through handover with photo updates. Fire safety follows Building Regulations Part B — protected escape route with FD30 fire doors on every habitable room along the route to the front door, mains-wired interlinked smoke alarms on every floor, 30-minute fire-resistant floor construction. Original ground-floor doors typically need replacement to FD30 standard at £400-£600 per door fitted. Stair design follows Building Regulations Part K — 2 metres minimum headroom, 42 degree maximum pitch. Fixed-price contracts cover labour, materials, structural engineer calculations (£800-£1,500 for the design pack; £1,500-£3,000 for mansard structural redesign), Building Control fees (£500-£900 at Hammersmith and Fulham), FENSA glazing registration, party wall surveyor coordination (typically two neighbours on Fulham mid-terraces), conservation area or full planning where applicable, FD30 escape route door upgrades, slate and lead flashing matching, and the Lawful Development Certificate or planning fee.
Loft Conversions in Fulham: What's Included
Loft Conversions Pricing in Fulham
£45,000 – £80,000
6–10 weeks | Fixed-price contracts | No hidden costs
What Our Customers Say
“All Well managed our project from start to finish. The fixed-price contract meant no surprises, and the result is stunning.”
Verified Customer
Fulham
“Professional team, clear communication throughout. They handled everything including Building Control sign-off.”
Verified Customer
Fulham
Frequently Asked Questions
- How much does a Fulham loft conversion cost?
- L-shaped dormer on a wider Victorian terrace (the most common Fulham project) runs £60,000-£90,000 including structure, staircase, en-suite plumbing, electrics, plastering, and decoration. Rear dormer on narrower Victorian terraces runs £52,000-£75,000. Mansard conversion runs £85,000-£130,000 reflecting the rebuilt roof structure and the planning consent process. Conservation area properties add 10-20% to standard cost because of stricter material matching (Welsh slate, lead flashing) and tighter design parameters. A typical Fulham conversion adds £120,000-£180,000 to property value, returning 1.7-2.0× build cost. FD30 escape route door upgrades are £400-£600 per door. Party wall surveyor (Agreed Surveyor route) is £900-£1,500. Fixed-price contract before any work starts.
- Why do Fulham conservation areas restrict dormers more than some other boroughs?
- Because Hammersmith and Fulham Council has more residential conservation area coverage than most West London boroughs and the council's design guidance is more prescriptive on dormer subordination. Within conservation areas, rear dormers must sit well below the existing ridge (typically 500mm or more, stricter than the standard 300mm), set back from the eaves by 300mm or more, and not exceed 60-70 percent of the rear roof slope width. Materials must match the existing — Welsh slate is common, with lead flashing throughout. Front-facing dormers are virtually never approved. The published design guidance is one of the clearest in London and our submitted designs typically get approved without revisions because we don't push the limits. For non-conservation properties, standard permitted development rules apply with more flexibility on dormer size and materials.
- Can I do a loft conversion on my Fulham mansion-block flat?
- Almost never. The Edwardian mansion blocks near Fulham Broadway and along Fulham Road have shared roof structures and leasehold structures that typically prohibit loft conversion. Even where the lease permits structural alteration, Section 20 freeholder consent and Licence to Alter would be required, and freeholders rarely approve loft conversions because they affect the building's shared roof and weather envelope. For top-floor mansion-block flats, the achievable scope is usually limited to skylight upgrades or — under separate planning consent and Licence to Alter — a roof terrace. A habitable loft conversion is rarely possible. We clarify scope at the survey rather than quoting work that can't be delivered through to handover.
- Why hire All Well for a Fulham loft conversion?
- Three reasons. First, accuracy: we know the SW6 stock — narrow Victorian terraces, the extensive Hammersmith and Fulham conservation areas, the dormer design rules tighter than most boroughs, and the mansion-block lease constraints. Second, full accreditation: NICEIC for electrical (BS 7671), FENSA for glazing, Gas Safe registered for boiler relocation, structural engineer calculations, and Building Control sign-off included on every project. Third, fixed-price contracts: the quote doesn't change unless the specification does, including conservation area applications, slate and lead flashing matching, mansard structural redesign, and party wall surveyor fees. 57 verified Google reviews averaging 4.5/5. Office on Limes Avenue, SE20.
Loft Conversions Near Fulham
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