Add £150k
to your home's value.
Architect-led loft conversions and extensions across SW6, SW3, W11 and SW11. Fixed price. 8–12 weeks on site. Ten-year guarantee. Pay only for completed work.
Based on Nationwide 2025 data: avg. loft conversion value uplift in SW postcodes.
Every horror story
starts the same way.
London renovation projects go wrong at an alarming rate. Not because homeowners are naive — because the industry is structured to hide the risks until it's too late to walk away.
The builder quotes low to win the job. Variations pile up after week 4. By month 3 you're 40% over with nowhere to go — because they have your deposit and your house open to the sky.
They said 10 weeks. At week 12 the site is empty for three days. Your family is living in dust. There's no fixed programme in the contract because they never wrote one.
No contract. No paper trail. No programme. When it goes wrong you discover that a verbal quote and a WhatsApp message hold no legal weight. You have nothing to fall back on.
We built 2VP specifically so this doesn't happen to you.
Everything included.
Nothing hidden.
One fixed price.
Free estimate · No obligation · No salesperson callback
Loft conversions and extensions
we're proud of.
Loft conversions and extensions —
plus everything else.
We specialise in lofts and extensions across prime West London. We also deliver new builds, full renovations, bespoke joinery, and design-only commissions.
Loft Conversions
Dormer, mansard, hip-to-gable. 8–12 weeks on site. From £55,000 including architect design and planning.
Extensions
Rear, side-return, wrap-around. Structural steel and slim-frame glazing. From £70,000 including design and planning.
Full Renovations
Whole-house refurbishments. Roof to cellar — fully finished.
Design by Nick Elias
RIBA Silver Medal-winning architecture. Concept through technical design.
Learn more →Bespoke Joinery
Kitchens, wardrobes, media walls, staircases. In-house workshop.
Learn more →Twelve stages,
fully managed.
Successful projects are structured long before construction begins. Every 2VP build follows the same twelve-stage process — so you always know what's next.
Discovery & Feasibility
We visit your site, understand your brief, and give you a realistic cost envelope before any fees are incurred.
Design & Planning
Nick Elias leads the architectural design. We handle planning applications, building regs, and all consultants.
Fixed-Price Contract
Open-book QS quote, line by line. Once signed, the price is locked. No provisional sums. No surprises.
Build & Aftercare
Director visits weekly. Daily site diaries. On handover: 10-year guarantee and annual check-ins.
“Vladimir put together a team of talented, hard-working professionals with a ‘can-do’ attitude and attention to detail. We couldn’t be more pleased with the results.”— Jackie · Extension & Modernisation · London
160+ projects across London.
Moncrieff Street · Loft Conversion
Moncrieff Street · Loft Bedroom
Amott Road · Extension Kitchen
Fieldway · Dormer Loft
Fieldway · Rear Extension
Cholmeley Park · Extension
Moncrieff Street · Extension
Built by 2VP.
Designed by Nick.
You speak to both.
2VP Construction Ltd is owned and run by Vladimir Castravet. Every contract, every site, every guarantee is 2VP's. Nick Elias Architects is our design partner — Nick handles concept and drawings; Vladimir runs everything else.
Sixteen years building for London's most demanding clients. 160+ completed projects across prime London including specialist fit-outs at the V&A Museum, Moncler and the South Bank cinema complex. On every 2VP site weekly. Signs every contract personally.
RIBA Silver Medal-winning architect. Previously at Foster + Partners and Haptic Architects, leading design on Apple HQ California, HS2 Euston, Istanbul New Airport and the Oslo Government Quarter. On 2VP projects Nick is the design partner — concept, drawings, RIBA Plan of Work stages 0–4. 2VP delivers everything else.
42 loft conversions and extensions
across West London.
All areasEverything you
need to know.
How much does a loft conversion cost in London?+
A dormer or hip-to-gable loft conversion in prime West London typically ranges from £55,000–£120,000 including architect design, structural engineering, planning (where needed) and VAT. Use our calculator for a free estimate tailored to your postcode and spec — it takes 60 seconds.
How much will a loft conversion or extension add to my home's value?+
Nationwide data shows loft conversions in SW postcodes add an average of £100,000–£150,000 in resale value — typically 15–20% of property price. A rear extension adds similar amounts. The net ROI is usually positive within 3–5 years in prime London postcodes.
Do I need planning permission for a loft conversion?+
Most lofts and rear extensions fall under Permitted Development and don't need full planning. Conservation areas and listed buildings almost always do. We handle the pre-app, application and building regulations as part of the design-and-build service.
What does the fixed-price quote actually cover?+
Every line item — design fees, planning fees, structural engineering, party wall surveys, build cost, bathrooms, kitchen, joinery, flooring, decoration, 10% contingency and VAT. If it's on the drawings, it's in the number. No provisional sums.
How long does a loft conversion take?+
A typical loft conversion takes 6–9 months from brief to handover: 2–3 months for design and planning, then 8–12 weeks on site. Extensions take 9–14 months total. We write the programme into the contract — not 'TBC at build start'.
What if I want to change something during the build?+
Every project includes 52 hours of variation time — changes to spec or layout that we pre-cost and present with options before you decide. Most changes are absorbed without extra charge. Where a variation affects cost, we tell you the price before we do the work.
Can we live in during the build?+
Usually yes for loft conversions and ground-floor extensions — we plan phased access. For full renovations you'll need to move out for part of the build. We plan this with you at feasibility, before any fees are committed.
What's included in the 10-year guarantee?+
A 10-year structural and workmanship warranty, underwritten via HomePro and backed by our professional indemnity insurance. It transfers with the property if you sell. We also do a personal annual check-in for the first two years — Vladimir or a director, in person.
Your loft conversion
starts with a number.
Get a realistic estimate in 60 seconds. A PDF breakdown in your inbox. A 15-minute call with Vladimir, if you want it. No commitment. No sales pressure.
We take 4 new projects per month across West London. Planning season books 3 months ahead.