Trusted Builders in Welwyn Garden City & Luton

House Extensions · Garage Conversions · Full Refurbishments · Bathroom & Kitchen Renovations

500+ Projects Completed

Trusted by homeowners across Welwyn Garden City, Luton & surrounding areas

Fully Insured

Full public liability and employers liability insurance. Docs available on request

20+ Years Experience

Established local builders with a proven track record of quality workmanship

TrustATrader Verified

Read our verified reviews from real homeowners on TrustATrader

Our Services

We specialise in larger residential projects across Welwyn Garden City, Luton, St Albans & Hitchin

Full Home Refurbishment

Complete property renovations including structural work, kitchens, bathrooms, flooring and full interior fit-out

House Extension

Single and double storey extensions to add space and long-term value to your home

Bathroom Renovation

Full bathroom redesigns and installations — from strip-out to finished tiling and fitting

Kitchen Renovation

Complete kitchen replacements including units, worktops, tiling, plumbing and electrical work

Garage Conversion

Convert your garage into a functional living space — home office, bedroom or utility room

Driveways

Block paving, tarmac and resin driveways installed to a high standard with clean finishing

Tiling & Painting

Professional tiling and painting services for kitchens, bathrooms and living areas

Laminate Flooring

Quality laminate flooring supply and installation throughout your home

Why Choose Master Builder?

Direct builders — no agencies or middlemen
Free site visits and detailed written quotes
Projects from £5,000 — serious jobs only
Fully insured — public liability & employers
Clear communication start to finish
Covering Welwyn Garden City, Luton, St Albans & Hitchin

What Our Customers Say

Verified reviews from real homeowners across Welwyn Garden City, Luton & surrounding areas

Melina 20th February 2026

We entrusted Master Builder with our full house renovation, including a full overhaul of the kitchen and bathroom, and we couldn’t be happier with the results. The team was professional, friendly, and provided regular updates. The new kitchen layout is both beautiful and functional, while the bathroom is now a relaxing retreat. The quality of work exceeded our expectations, and we appreciated their attention to detail and commitment to completing the project on schedule. Highly recommended!

Simon Lorton 17th February 2026

Master Builder just finished a full renovation in our home, and honestly we’re really happy with how it turned out. Our old kitchen and bathroom now look modern and much more functional, it feels like a completely new space. The team worked hard, stayed on schedule, and were always respectful of our house. There were no big issues along the way and the final result even better than we expected.

George Osborne 8th February 2026

We trusted Master Builder with a full house renovation, including major work on the kitchen and bathroom, and we’re very glad we did. Communication was clear throughout, and the team was friendly and professional. The new kitchen is both practical and visually appealing, and the bathroom now feels like a calm, well-finished space. The attention to detail and overall quality of work were excellent, and we’d happily recommend them.

Emily Thompson 1st February 2026

Master Builder carried out a full refurbishment of our property, and we are extremely satisfied with the outcome. Istvan was reliable, well organised, and kept us updated at every stage of the project. The workmanship was excellent, particularly on the larger elements of the build. It is clear that they specialise in full house refurbishments, and we would not hesitate to use them again.

Our Work Gallery

Refurbishment & Extension Bathroom Kitchen Tiling Painting Flooring Driveways

A selection of our projects across Welwyn Garden City, Luton, St Albans & Hitchin

Frequently Asked Questions

Everything you need to know before getting in touch

What type of projects do you take on?

We specialise in projects starting from £5,000 including house extensions, garage conversions, bathroom renovations, kitchen renovations and full property refurbishments. We do not take on small repair or maintenance jobs.

Do I need planning permission before contacting you?

You do not need approved planning permission to contact us, but we do require that you have architectural drawings or a clear brief before we carry out a site visit and provide a quote. We can advise on the planning process during your initial call.

What areas do you cover?

We work across Welwyn Garden City, Luton, St Albans, Hitchin and surrounding areas within approximately 25 miles.

What happens after I call?

We will discuss your project briefly on the phone. If it is a good fit we will arrange a free site visit to assess the work and provide a detailed written quotation. No work begins until you have received and approved a written quote.

Do you provide written quotations?

Yes. Every quote is provided in writing with a full breakdown of costs before any work begins. We do not charge for quotations.

Are you fully insured?

Yes. We carry full public liability insurance and employers liability insurance. Documentation is available on request.

How long does a typical project take?

A bathroom renovation typically takes 1–2 weeks. A house extension or full refurbishment can take 6–12 weeks depending on size and complexity. We provide a realistic timeline in every written quotation.

Do you use subcontractors?

We are direct builders. We do not use agencies or middlemen. All trades on your project are known to us personally and work to our quality standards.

Areas We Cover

We serve homeowners across Hertfordshire and Bedfordshire — here are our main service areas

We take on larger residential projects within approximately 25 miles of Welwyn Garden City and Luton. If you are unsure whether we cover your area, call us and we will let you know straight away.

We focus on Welwyn Garden City and Luton but regularly work across the wider Hertfordshire and Bedfordshire area. Projects outside this range are considered on request.

Ready to Start Your Project?

Free site visits and detailed written quotes for projects from £5,000. No obligation, no pressure.