Mansard Roof Extensions · SW6 Fulham
Hammersmith & Fulham controls several SW6 conservation areas; Fulham's terraces are one of west London's busiest side-return and loft markets.
This page covers one part of the borough. For the full picture — fees, timelines and the council's current position — read mansard roof extensions in Hammersmith and Fulham.
A mansard roof extension adds a full storey behind a new sloping front face — a strong option on SW6's terraces in Fulham where a standard dormer is too small. Hammersmith & Fulham Council scrutinises mansards on townscape and precedent, especially within Parsons Green, Peterborough Estate, Hurlingham, Munster; we design to the borough's roof guidance with a Heritage Statement where the setting requires it.
Fulham's most space-efficient loft solution when PD-route dormers are blocked. Our chartered team designs mansards that get approved in Fulham conservation areas — with heritage statements and planning officer negotiation built in.
Across Fulham, Parsons Green, Munster Village, Sands End in SW6, the dominant property is victorian terraces — the classic fulham 'two-up two-down' and larger bay-fronted houses — with mansion blocks and riverside new-build. That stock shapes what mansard roof extensions looks like here: the right approach for a period terrace differs from a mansion-block flat or a new-build, and Hammersmith & Fulham Council judges each on design quality and neighbour impact. We survey the specific Fulham property, confirm the planning route — Permitted Development, a Lawful Development Certificate, or full planning — and draw a council-ready set tailored to the SW6 streetscape.
Housing stock in SW6: Victorian terraces — the classic Fulham 'two-up two-down' and larger bay-fronted houses — with mansion blocks and riverside new-build.
Within the district: Fulham, Parsons Green, Munster Village, Sands End.
Streets we know in SW6: the Peterborough Estate 'Lion houses', the Munster Village streets, Hurlingham Road and the Parsons Green terraces. Each road has its own building line, boundary treatment and precedent that Hammersmith & Fulham Council weighs when assessing a mansard roof extensions scheme.
Conservation areas: Parsons Green, Peterborough Estate, Hurlingham, Munster. Inside these, most external work needs full planning and a Heritage Statement.
Getting around SW6: Parsons Green, Fulham Broadway and Putney Bridge on the District line, plus Imperial Wharf Overground.
Regeneration: Fulham falls within or beside the Fulham riverside / Imperial Wharf, which shapes local planning policy and design expectations.
Property values: around £650,000 for a flat and £1.3m-£2m for a house — a useful gauge of the build value an extension or loft adds in SW6.
Borough character: Suburban-feel residential streets with strong conservation area coverage; well-established mansard precedents on many terraces.
We check against Hammersmith & Fulham Council's mansard design guide and design to match the terrace.
Required for Fulham's conservation areas — demonstrates the mansard respects character and townscape.
Accurate photomontage showing how the mansard sits alongside neighbours — often decisive at Hammersmith & Fulham Council committee.
Mansards invariably trigger Party Wall notices in Fulham's dense terraced streets. Structural package includes new ridge, tie beams, floor joists.
Full liaison with Hammersmith & Fulham Council planning officer, committee representation if called in.
Part L thermal, Part B fire (critical on mansards), Part E acoustic separation.
Single planning or building-regs submission.
Planning + building regs + structural.
Listed, conservation or complex sites.
Because SW6 is wall-to-wall Victorian terraces — the classic Fulham two-storey houses around Munster Village and the Peterborough Estate — ideal for side-return kitchen extensions, lower-ground digs and L-shaped loft dormers as families upsize in place. We've drawn hundreds of these to Hammersmith & Fulham's standards.
Often, outside the conservation areas — a side-return within depth limits and an L-shaped rear dormer within the volume allowance, confirmed by a Lawful Development Certificate. Inside Parsons Green, Hurlingham, Munster or the Peterborough Estate, full planning applies. We confirm which covers your road.
Often, yes. Many SW6 terraces gain a kitchen-diner by lowering and extending the lower-ground floor with a rear lightwell, subject to the council's basement policy and a structural and hydrology assessment. We draw the scheme and coordinate the engineer's calculations.
With SW6 houses around £1.3m-£2m, a well-designed side-return, loft or lower-ground extension adds floor area worth well above the build and drawing cost, and Fulham's demand keeps resale strong. Our fixed drawing fee keeps the professional cost predictable.
With Fulham property at around £650,000 for a flat and £1.3m-£2m for a house, the professional drawing fee is a small fraction of the value the work adds to SW6's victorian terraces — the classic fulham 'two-up. Hammersmith & Fulham Council charges its own statutory application fee on top (currently £548 for a householder planning application, £610 for a full application). We quote the drawings as one fixed price and the free site survey covers every SW6 address.
For a SW6 project across Fulham, Parsons Green, Munster Village, Sands End, expect roughly 3–4 weeks from instruction to submission: week 1 the measured survey, weeks 2–3 the drawings and your revisions, then validation and the statutory determination by Hammersmith & Fulham Council (8 weeks for a householder application). We carry the Fulham application through every officer query to the decision.
Fulham (SW6) sits primarily in Hammersmith and Fulham, so applications are decided by Hammersmith & Fulham Council. Conservation areas within SW6 include Parsons Green, Peterborough Estate, Hurlingham, Munster, where full planning and a Heritage Statement are required. We confirm the planning route for your exact address before quoting.
Almost always. Any structural work behind mansard roof extensions in Fulham — new openings, steel beams, loft floors, foundations — needs Building Regulations approval covering structure (Part A), fire escape (Part B) and insulation (Part L), submitted to Hammersmith & Fulham Council Building Control or an approved inspector. On SW6's typically terraced and semi-detached stock, a Party Wall notice to adjoining neighbours is normally required before the steelwork. We coordinate both as part of the Complete package.
In value terms, yes. With Fulham (SW6) property at around £650, 000 for a flat and £1.3m-£2m for a house, a well-designed extension or loft typically returns more than it costs in added floor area and sale value. The bigger risk is an unapproved or non-compliant scheme — which is why council-ready drawings and a clean Building Control sign-off matter on SW6 homes.
Local policy varies more between adjoining boroughs than most owners expect. Full service detail for W6, W12 and W14.
Pick a slot that suits you. No obligation and no sales pressure, just straight answers on your planning route.
Every SW6 postcode district we draw in, the stock that dominates it and the authority that validates a mansard roof extension there. SW6 fees below are the statutory England rates for 2026, not mansard roof extension estimates.
| Postcode | Area | Dominant stock | What it means for a mansard roof extension |
|---|---|---|---|
| SW6 | Fulham / Parsons Green | Victorian terraces, mansion blocks | A mansard roof extension at an SW6 address in Fulham / Parsons Green is determined by Hammersmith & Fulham Council under its own Local Plan policies for Fulham / Parsons Green. |
| SW6 | Fulham | Victorian terraces, mansion blocks | Fulham sits inside SW6; mansard roof extension proposals here are determined by Hammersmith & Fulham Council. |
| SW6 | Parsons Green | Victorian terraces | Parsons Green sits inside SW6; mansard roof extension proposals here are determined by Hammersmith & Fulham Council. |
| SW6 | Sand's End | Victorian terraces, new-build | Sand's End sits inside SW6; mansard roof extension proposals here are determined by Hammersmith & Fulham Council. |
| W6 | Hammersmith / Brackenbury Village | Victorian terraces, mansion blocks | Adjoining district to SW6, also inside Hammersmith and Fulham for mansard roof extension purposes. |
| W12 | Shepherd's Bush / White City | Victorian and Edwardian terraces | Adjoining district to SW6, also inside Hammersmith and Fulham for mansard roof extension purposes. |
| W14 | West Kensington / Barons Court | Victorian and Edwardian villas | Adjoining district to SW6, also inside Hammersmith and Fulham for mansard roof extension purposes. |
Roof pitch, wall build-up and plot depth change every few SW6 streets, and each one changes what a mansard roof extension can achieve at that address.
Conservation areas covering SW6 (Fulham / Parsons Green): Hammersmith & Fulham Council runs 45, and Walham Green, Hammersmith Grove, Brackenbury Village are the ones SW6 (Fulham / Parsons Green) owners meet most. A mansard roof extension inside a SW6 (Fulham / Parsons Green) conservation area loses permitted development, so the SW6 (Fulham / Parsons Green) submission is a householder application at £548 decided in 8 weeks — not a £249 prior approval decided in 6 weeks. In Walham Green a mansard roof extension is judged on the street elevation first.
SW6 (Fulham / Parsons Green) and Article 4: Article 4 removes PD for HMO conversions; restrictions on ground-floor shop-to-residential in certain streets. A mansard roof extension planned at a SW6 address is checked against that direction first; Hammersmith & Fulham Council publishes the SW6 (Fulham / Parsons Green) extent, and the SW6 line rarely follows the SW6 (Fulham / Parsons Green) boundary you would expect.
What SW6 (Fulham / Parsons Green) is built from: Victorian and Edwardian terraces — particularly two-storey bay-fronted terraces south of the river in Fulham and Parsons Green; mansion blocks along main roads. Suburban-feel residential streets with strong conservation area coverage; well-established mansard precedents on many terraces. That mix decides the mansard roof extension route in SW6 (Fulham / Parsons Green) more than the postcode does, and it is what a Hammersmith & Fulham Council case officer reads first. A householder application costs £548 paid to Hammersmith & Fulham Council direct, with 8 weeks to a decision once validated.
Sources for this SW6 mansard roof extension page: borough policies maps and conservation-area registers (2025–26), Royal Mail postcode district boundaries, the Town and Country Planning (Fees for Applications) (England) Regulations, the Town and Country Planning (General Permitted Development) (England) Order 2015 as amended, and the Party Wall etc. Act 1996.
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