Loft Conversions · London

One floor you’re not using.
One contract. Eight weeks.

A London rear dormer adds 25 m² and up to £200k to your home value. 2VP builds it in a single fixed-price contract — no architect juggling, no trade management, no surprises on the bill.

£30k–£160k
Typical cost range
+20%
Home value uplift
6–16 wks
On site, in writing
10 yr
HomePro guarantee
01
Fixed Quote, Itemised
Every line costed before we start. If we miss it, we pay it — not you.
02
Stage Payments, QA-Gated
Stage payments release only after independent QA signs the work off — not on the calendar.
03
Daily On-Site Report
Every working day: photos, what was done, what's next. You'll never wonder what's happening on site.
04
12-Month Workmanship Warranty
Backed by the company that built it — not handed off to a third party. Plus a 10-year HomePro insurance-backed guarantee.
05
One Named PM, Start to Finish
From first sketch to final snag: one person, one mobile number, one accountable team.
What a loft conversion with 2VP looks like

One unused floor. One quiet 8–14 weeks. A new home.

A London loft conversion adds a master bedroom, guest suite or study without moving postcode — and on a typical Victorian terrace it pays for itself the day you list it.

+30 m²
New floor area
A typical London rear dormer adds 22–35 m² of usable space — one bedroom plus en-suite, or two smaller rooms.
+20%
Home value uplift
Architecture for London puts a full conversion at +20% home value, +15% for a master bedroom only, +5% for an en-suite alone.
8–14
Weeks on site
Velux 6–8 weeks · rear dormer 8–12 · L-shape and hip-to-gable 10–14 · mansard 12–16. Fixed in writing before contract.
1
Contract, one team
No design-vs-builder ping-pong. Nick Elias Architects (RIBA Silver Medal) and 2VP's build team work under one signed agreement.
10 yr
Guarantee in writing
HomePro insurance-backed cover. Enforceable directly against the underwriter even if 2VP ceased trading. Travels with the property.
Five conversion types

Five ways to convert. One sane process.

All costs include VAT, design, planning, structural engineer, and contingency.

01
Velux / Rooflight
£30k–£65k18–28 m²6–8 weeksPermitted Development
+
Right for you when

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.

Cost incl. VAT£30k–£65k
Floor area added18–28 m²
On site6–8 weeks
PlanningPermitted Development
Price my loft
02
Rear DormerMost popular
£55k–£95k22–35 m²8–12 weeksPermitted Development
+
Right for you when

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.

Cost incl. VAT£55k–£95k
Floor area added22–35 m²
On site8–12 weeks
PlanningPermitted Development
Price my loft
03
L-Shape Dormer
£70k–£115k30–45 m²10–14 weeksPermitted Development
+
Right for you when

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.

Cost incl. VAT£70k–£115k
Floor area added30–45 m²
On site10–14 weeks
PlanningPermitted Development
Price my loft
04
Hip-to-Gable
£60k–£100k20–30 m²8–12 weeksPermitted Development
+
Right for you when

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.

Cost incl. VAT£60k–£100k
Floor area added20–30 m²
On site8–12 weeks
PlanningPermitted Development
Price my loft
05
Mansard
£90k–£160k35–50 m²12–16 weeksFull Planning required
+
Right for you when

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.

Cost incl. VAT£90k–£160k
Floor area added35–50 m²
On site12–16 weeks
PlanningFull Planning required
Price my loft
Cost breakdown

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.

£30k–£160k
Cost range
+20%
Value uplift
8–12 wks
On site
160+
Lofts built
Structure & steelwork£24,000
Roofing & insulation£13,500
MEP — electrics, plumbing, heating£11,250
Joinery, plastering & finishes£10,500
Design, planning & engineers£7,500
Contingency (built in)£6,000
Scaffolding, skips & logistics£2,250
Total incl. VAT£75,000
Transparency

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.

Optional upgrades

Extras you price before you sign.

En-suite bathroom
+£8k–£18k
Full fit-out including wetroom or bath
Juliet balcony
+£3k–£6k
Framed glazed balustrade
Velux balcony window
+£4k–£7k
GGL Cabrio opening roof window
Underfloor heating
+£4k–£8k
Electric mat, thermostat included
Bespoke staircase
+£6k–£20k
Oak, steel, or glass to RIBA design
Walk-in wardrobe
+£4k–£10k
Full bespoke joinery, fitted to mm

All add-ons priced at contract stage — no surprises mid-build.

Real loft conversion · Project #005 · Inner London

Project #005 — Victorian terrace, inner London.

A 30 m² rear dormer with a master bedroom suite, new staircase and en-suite shower-room — built into the existing roof of a Victorian inner-London terrace. The fixed-price contract held to the penny.

£100k
incl VAT
30 m²
new floor
11 wk
on site
0
variations
  • New rear dormer + EPDM flat roof, structural steels and reinforced floor build-up
  • Master bedroom suite with new en-suite shower-room (45 electrical points)
  • Bespoke straight-run staircase + balustrade, oak treads matched to lower floors
  • Velux rooflight to landing for borrowed light, glazed Juliet to the rear
  • JCT Minor Works contract · daily on-site report from week 1 to handover
How a 2VP loft conversion is built

Four steps. One signed agreement.

The same four steps every London loft conversion goes through with us. No consultancy waffle, no two-companies-passing-notes.

STEP 01
Get clear in 2 minutes
The calculator returns a London-zoned range and shows real 2VP lofts at that range. No email gate, no follow-up unless you ask.
60 seconds
STEP 02
Meet the people who'll build it
A 90-minute site visit. Vladimir, Nick (Architect) and your Project Manager — on a single call. Not a roster. Not three quotes from strangers.
Week 1
STEP 03
Lock the quote, sign the contract
Itemised line-by-line scope from our in-house QS, JCT Minor Works contract, stage payments QA-gated. Planning & party-wall handled before site mobilisation.
Weeks 2–12
STEP 04
Watch it happen
Daily report at 5pm: photos, what was done, what's next. Independent QA at every stage. Hand-over with the 10-year HomePro guarantee in your hand.
8–14 weeks on site
What homeowners say

The bit only real loft clients can write.

★★★★★
“The daily report at 5pm meant I never had to phone anyone. By week 4 I was reading it on the bus and trusting it.”
Sarah
Fulham · SW6
Rear dormer · 28 m² · £92,400
★★★★★
“Two architects had quoted us a year of waiting. 2VP delivered drawings, planning and build in seven months. Same person all the way through.”
James
Battersea · SW11
L-shape dormer · 38 m² · £104,800
★★★★★
“The fixed price held to the penny. They flagged one variation in writing, priced it before they did it, and we signed. No surprises.”
Anna
Notting Hill · W11
Mansard · 34 m² · £128,500

Read all 7 verified Google reviews.

Where we build London lofts

59 prime London areas, one Fulham studio.

2VP’s studio is on Dawes Road, SW6. We carry full knowledge of borough planning regimes, conservation overlays, party-wall density and parking-suspension rates across these zones.

Fulham & West London
  • Fulham · SW6
  • Parsons Green · SW6
  • Sands End
  • Chiswick · W4
  • Hammersmith · W6
  • West Kensington · W14
  • Shepherd's Bush · W12
  • Acton · W3
Prime Central
  • Chelsea · SW3
  • South Kensington · SW7
  • Kensington · W8
  • Notting Hill · W11
  • Holland Park · W11
  • Paddington · W2
  • Belgravia · SW1X
  • Marylebone · W1
South West & South
  • Battersea · SW11
  • Clapham · SW4
  • Putney · SW15
  • Wandsworth · SW18
  • Wimbledon · SW19
  • Barnes · Richmond
  • Brixton · SW2
  • Vauxhall · Nine Elms

Don’t see your postcode? Tell us where you are — we work across all of prime London.

FAQ

Questions every homeowner asks.

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