Five ways to convert. One sane process.
All costs include VAT, design, planning, structural engineer, and contingency.
01Velux / Rooflight£30k–£65k18–28 m²6–8 weeksPermitted Development+
Generous head height, healthy ridge, no extra width needed. Rooflights cut into the existing slope — no new structure added to the perimeter. Permitted Development in most London boroughs. The fastest way to unlock a bedroom and bathroom in the roof space.
02Rear DormerMost popular£55k–£95k22–35 m²8–12 weeksPermitted Development+
You want maximum floor area on a Victorian terrace. Full standing height throughout. The rear slope is replaced by a vertical dormer wall and flat roof — the most common loft type 2VP builds across Fulham, Battersea, and Chiswick.
03L-Shape Dormer£70k–£115k30–45 m²10–14 weeksPermitted Development+
You have both a rear and side return roof slope — combining two dormers into a single L-shape for maximum floor area. Adds an extra bedroom and bathroom compared to a standard rear dormer.
04Hip-to-Gable£60k–£100k20–30 m²8–12 weeksPermitted Development+
Your property has a hipped roof — sloping on all four sides. Extending the gable end to a vertical wall creates significant extra volume. Often combined with a rear dormer for a larger conversion.
05Mansard£90k–£160k35–50 m²12–16 weeksFull Planning required+
Maximum volume, flat roof with near-vertical rear face. Often the only option in conservation areas and on listed buildings where a conventional dormer would be refused. Always requires Full Planning consent.
Where your £75,000 goes.
Typical rear dormer loft conversion in inner London. Your contract is itemised line-by-line — every number agreed before work starts.
What’s in the price. What isn’t.
Included
- ✓Architectural design & drawings (Nick Elias Architects)
- ✓Planning application (where required)
- ✓Structural engineer
- ✓Party-wall surveyor (where applicable)
- ✓Building Regulations / Control
- ✓All structural steelwork
- ✓Roofing, insulation, cladding
- ✓Staircase (straight or bespoke)
- ✓1st & 2nd fix electrics, plumbing, heating
- ✓Plastering & decoration to white primer
- ✓Scaffolding, skips, parking suspensions
- ✓Daily site clean & welfare
- ✓10-year HomePro insurance-backed guarantee
Not included
- –Furniture & soft furnishings
- –Bespoke joinery (available as add-on)
- –Bathroom or kitchen supply
- –Underfloor heating (available as add-on)
- –External landscaping
- –Specialist AV / smart home systems
- –Owner-supplied fixtures or fittings
Every item is specified line-by-line before you sign. The number is the number.
Extras you price before you sign.
All add-ons priced at contract stage — no surprises mid-build.
FAQ
Questions every homeowner asks.
Do I need planning permission for a loft conversion?
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Most loft conversions in London fall under Permitted Development (PD) rights — no planning application required. PD applies if the volume added is under 40m³ (terraced) or 50m³ (semi/detached), the ridge height isn't raised, and materials match the existing roof. Exceptions: conservation areas, Article 4 directions, listed buildings, and mansard conversions always need Full Planning. We advise on PD eligibility at the free site visit.
Why one company instead of three quotes?
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Three quotes from strangers means three companies that can blame each other when something cracks. With 2VP, the team that prices your project also designs it, builds it, and signs the 10-year HomePro guarantee. One mobile number from first sketch to final snag — and the person you meet on day one is the person whose name is on the warranty on day 365.
What if 2VP can't finish my project?
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Our contracts include a financial completion bond and a list of named partner contractors. If anything happens to 2VP, your build still completes at the agreed price. The 10-year HomePro insurance-backed guarantee follows the property — not the company.
What protects my money?
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Stage payments are released only after our independent QA inspector signs each stage off — never on the calendar. No upfront builder payment. JCT Minor Works contract. Itemised line-by-line scope. £17m total insurance cover (Public Liability £5m, Employer's £10m, Professional Indemnity £2m, plus Contract Works All-Risk and Product Liability).
How does 2VP vet its team?
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The same trades on every 2VP project — not an open call. Lead carpenter, electrician, plumber, plasterer, decorator: all on rolling annual contracts, all DBS-checked, all sign the 12-month workmanship warranty alongside us. Architectural design is in formal partnership with Nick Elias Architects (RIBA Silver Medal).
What's covered by the warranty?
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Two layers. (a) 12-month workmanship warranty backed by 2VP — covers anything we've installed that fails to perform as specified, including all snagging. (b) 10-year HomePro insurance-backed structural guarantee — underwritten and enforceable directly against the underwriter even if 2VP ceased trading. Travels with the property.
How will I know what's happening on site?
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A daily on-site report at 5pm: photos taken at 09:00 and 17:00, captions, who was on site, what was done, what's next. Sent to your WhatsApp + email. Plus a written 48-hour SLA on every M2 Manager question. Plus QA-gate sign-off photos before any stage payment moves. You'll never wonder.
What's included in the price?
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Everything in the itemised scope: full architectural design, planning application, structural engineer, party-wall surveyor (where applicable), Building Control, scaffolding, skips, parking suspensions, welfare and a daily clean. The full scope is on the contract before you sign — line by line. The number is the number.