Price your London project
before you trust a builder.
Get a free 60-second cost estimate using our 2026 London rate card. No callback, no salesperson, no obligation — the same numbers we use on real client projects. Design and build. Itemised. Ten-year guarantee.
Three steps. Zero pressure.
No quote until you are ready.
We've built a value ladder for homeowners who've been burned before or want to do their own research first. Start anywhere. Stop anywhere.
Instant cost estimate
Postcode, project type, size, spec tier. Our calculator runs the same rate card we quote real clients with — back to you on screen, no signup.
Open the calculator →2026 London Cost Guide
The breakdown most builders don't show you: where every £ goes, what hidden costs catch homeowners out, and how to read a quote properly.
Email me the guide ↓Architect consultation
Sit down with Nick Elias RIBA and Vladimir. Bring your floorplan or sketches. Walk out with a real route forward — even if it's not us.
Book a slot →Why most London builders won't quote you straight — and how we fixed it.
The lowball quote
A figure designed to win the job, then repriced via variations once you're committed. Industry-standard overrun: 18–28%.
Our quote = the contract sum. Variations only ever go down unless you change the spec yourself.
The vanishing programme
“Twelve weeks” turns into seven months. Your kids share a bedroom for the summer. No-one is accountable.
Fixed programme written into the contract. Late completion = our problem, not yours.
The orphaned design
Architect draws it, builder can't price it, you sit between two contracts trying to bridge the gap.
Nick Elias RIBA leads design under the same contract as the build. One team, one number, one accountable.
What homeowners actually pay this year.
All figures inclusive of design, planning, build, contingency and VAT. Tighter numbers for your postcode and spec live inside the calculator.
The 2026 London Cost Guide for homeowners.
The honest breakdown most builders won't show you. Built from our own client projects across SW6, SW3, W11, SW11 and W4.
- ✓Where every £ actually goes on a £200k extension
- ✓How to read a builder’s quote (and spot the gaps)
- ✓Borough-by-borough price multipliers across London
- ✓The 7 hidden costs that catch homeowners out
- ✓Realistic programmes — design through to handover
- ✓Questions to ask before you sign anything
Send me the guide.
What homeowners ask us before they book a calculator.
How much does a design & build project cost in London in 2026?
Typical 2026 London ranges (inc. design, build, contingency & VAT): loft conversions £75k–£160k; rear or side-return extensions £90k–£280k; full house renovations £180k–£650k; new builds £450k–£1.8m. The figure depends on borough, specification tier and structural complexity. Use the calculator for a tailored 60-second estimate based on your postcode and project.
What's the difference between design & build and using a separate architect + builder?
Traditional procurement asks you to manage two contracts: the architect designs, then you tender to builders who often quote optimistically and reprice later. Design & build wraps both under one JCT contract with one team accountable. You get one price against one agreed scope, one programme, one point of contact — and no finger-pointing if something goes wrong. If the scope changes the price changes with it, priced and signed by you first, which is a different thing from being repriced after the fact.
Is 2VP a real design and build practice or just a builder?
Both. Our collaborating architect Nicholas Elias is a RIBA-chartered architect and Silver Medal recipient. He leads scheme design, planning submissions and detailing. Vladimir Castravet leads delivery on site. Every project gets architect input — not a draughtsman copying a template.
What warranty comes with the work?
Every 2VP project carries a 12-month workmanship warranty on second-fix fittings backed by us and signed by the trades who did the work. On top of that, a 10-year HomePro insurance-backed guarantee is available on request: you arrange it with HomePro and pay them directly, at 2.5% of the contract value. Because it is underwritten independently, an insurer would cover defects for 10 years from practical completion even if the company ceased trading. Both sit alongside our public liability and contract works insurance.
Which areas of London does 2VP cover?
Our core boroughs are Fulham (SW6), Chelsea (SW3), Notting Hill (W11), Chiswick (W4), Battersea (SW11), Hammersmith, Clapham, Wandsworth, Wimbledon, Putney and Paddington. We work across Zones 1–3 and selectively further out for whole-house projects.
How long does a typical project take from first call to keys?
Loft conversions usually run 14–18 weeks on site after planning. Extensions 16–22 weeks. Full renovations 6–10 months. Add 8–12 weeks for design and planning beforehand. Our fixed programme is part of the contract — late delivery costs us, not you.
Do I have to pay for the design before I commit to building with 2VP?
Design is a separately costed stage so you can stop after planning if you choose. But our design fees are credited against the build cost if you proceed, which is why most homeowners go all-in from the start.
What's the catch with the free instant estimate?
There isn't one. The calculator uses our internal 2026 rate card — the same one we use for client quotes. No callback, no salesperson, no obligation. Worst case you get a number; best case you book a site visit.
Twenty minutes with a RIBA architect.
For free.
Bring your floorplan, your Pinterest, or just a rough idea. Nick Elias RIBA and Vladimir will give you a real route forward — feasibility, planning likelihood, realistic budget, sequence.
Held in the studio at 20 Dawes Road SW6, on a video call, or on site. Whichever suits you.
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