House extensions
Single, double-storey and wrap-around extensions that add space, light and real value to your home.
Discuss this projectBespoke design & build · London & the Home Counties
Homes that work harder,
and live more beautifully.
Extensions, loft conversions and full renovations — designed and built by one accountable team. Fixed-price quotes, no surprises, finished on schedule.
- Free, no-obligation quote
- Fixed price before we start
- 10-year structural warranty
5.080+ reviews
on Google & Houzz
on Google & Houzz
15+Years building
200+Projects delivered
5.0★Rated on Google & Houzz
100%Fixed-price quotes
Accredited & insured:
- Federation of Master Builders
- TrustMark Registered
- Part P Certified
- 10-Year Structural Warranty
What we build
One team for the whole project
Design, planning and construction under one roof means fewer hand-offs, one point of contact, and a single team accountable from first sketch to final snag.
Loft conversions
Turn unused roof space into a bright bedroom, home office or en-suite — dormer, hip-to-gable or mansard.
Discuss this projectFull renovations
Whole-house refurbishments that reconfigure, re-wire and restore, tailored around how you actually live.
Discuss this projectKitchens & bathrooms
Considered, hard-wearing spaces — from structural openings to the final tile and tap.
Discuss this projectNew builds
Ground-up homes and garden studios delivered to architectural drawings with meticulous detailing.
Discuss this projectDesign & planning
In-house design, drawings and planning support so your project starts on the right foundations.
Discuss this projectHow it works
A calm, predictable process
Most people worry about spiralling costs, drifting deadlines and builders who go quiet. We built our process to remove exactly those fears.
- 01
Free consultation
We visit, listen to your plans and talk honestly about budget, feasibility and timelines. No pressure, no charge.
- 02
Design & fixed quote
Our team produces drawings and a detailed, itemised quote. The price you approve is the price you pay.
- 03
Build
One dedicated project manager, a tidy site and weekly updates. You always know what's happening and what's next.
- 04
Handover & warranty
We snag, clean and walk you through everything — then back it with a 10-year structural warranty.
Start with a free consultationUsually booked within 48 hours.
Recent projects
Work we’re proud to put our name to
Victorian terrace+18% valuation
Rear kitchen extension
Wrap-around extension with roof lantern and bi-fold doors.
1930s semiExtra bedroom
Loft conversion + en-suite
Dormer conversion completed in 9 weeks, on budget.
Family homeWhole-house refit
Full renovation
Re-wired, re-plumbed and re-imagined around a growing family.
Our promise
The risk is on us,
not on you.
Choosing a builder is a leap of faith. These are the commitments we put in writing on every single project.
Book your free consultationFixed price, in writing
Your quote is locked before a single tool comes out. No mid-project surprises.
Finished on schedule
We agree a completion date up front and give you a written programme to hold us to.
10-year structural warranty
Insurance-backed cover on structural work, so your investment is protected long after we leave.
Homeowners on LVX
Rated 5.0★ by the people who matter most
80+ verified reviews across Google & Houzz. Here is what it’s like to build with us.
From the first visit they were straight with us about cost and timing. The extension came in on the fixed price and finished a week early. Genuinely faultless.
A tidy site, a project manager who actually answered the phone, and beautiful workmanship. We've already recommended them to two neighbours.
They renovated our whole house while we lived in it and made it painless. The attention to detail on the finish is what really sets LVX apart.
Good questions
Everything you’re wondering
Still unsure about something? Ask us directly at your free consultation — no jargon, no pressure.
Ask us anythingEvery home is different, so we don't do one-size-fits-all pricing. After a free consultation and measured survey we give you a detailed, itemised fixed quote — so you know the exact figure before committing to anything.
Yes. Our in-house design team can produce drawings and manage planning and building-control applications for you, so you have a single point of contact from concept through to completion.
We give you a written programme with your quote. A typical loft conversion runs 6–10 weeks and a rear extension 10–16 weeks, depending on scope. We agree the completion date up front and keep you updated weekly.
In most cases, yes. We phase the work, seal off dust, and keep the site tidy and secure so you can live at home with as little disruption as possible.
Structural work is covered by an insurance-backed 10-year warranty, and we stand behind our workmanship. If anything needs attention, one call is all it takes.
Fully. We carry public liability insurance and hold recognised industry accreditations. We're happy to share certificates and references at your consultation.
Free consultation
Let’s talk about
your project
Tell us a little about what you have in mind. We’ll be in touch within one working day to arrange a free, no-obligation consultation.
- No cost and no pressure
- Honest advice on budget & feasibility
- A fixed price before you commit