Garage Conversion in Welwyn Garden City & Luton

Convert Your Garage Into a Living Space · Home Office · Bedroom · Utility Room · Playroom

Serving Welwyn Garden City, Luton, St Albans & Hitchin · Projects from £5,000

Professional Garage Conversion Service

We specialise in garage conversions, creating practical and modern living spaces tailored to each customer’s needs. Whether it is a home office, an extra bedroom, a gym or additional family space, we manage the full project from start to finish.

Our work includes structural alterations, insulation, electrics, plumbing, plastering and all final finishes — completed to a high standard throughout.

Garage conversions are one of the most cost-effective ways to add valuable living space to your home, and in most cases do not require planning permission.

What's Included in a Garage Conversion

From insulation and flooring through to plastering, electrics and final decoration — here is what a typical garage conversion covers

Structural Alterations

Internal wall removals, structural alterations and any required groundwork to prepare the garage space for conversion

Garage Door Removal & Infill

Removal of the existing garage door and professional brickwork infill to match your existing property

Windows & Doors

Supply and installation of new windows and a door to bring natural light into the converted space

Insulation

Full floor, wall and ceiling insulation to building regulations standard — essential for a warm, comfortable living space

Electrics & Plumbing

New consumer unit connection, lighting, sockets, heating and plumbing where required for the intended use

Plastering & Decoration

Full plastering, skimming and decoration throughout the converted space to a clean professional standard

Flooring

Laminate, engineered wood, tiling or carpet fitted throughout the converted space

Internal Door & Joinery

New internal door connecting the conversion to the main property, with matching skirting and architrave throughout

Project Management

One point of contact throughout — clear communication, realistic timelines and written quotes

Why Choose Master Builder?

Garage conversions managed start to finish — one team, one contact
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 Customers Say About Our Work

Master Builder

5.0

Based on 24 reviews

review us on

Jasiah Alanna

05:54 17 May 25

Had our entire home renovated by Master Builder, including a loft extension and full interior refit. Super professional and the finish is flawless.

Rylan Madyson

20:41 11 Apr 25

I’ve worked with a few builders in the past, but Master Builder stands out for their professionalism and quality of work. They transformed my outdated bathroom into a modern space that I absolutely love. Thank you!

Elisha Presley

20:04 10 Apr 25

I was dreading the renovation process, but Master Builder made it stress-free. Their project management was excellent, and they handled everything from planning to execution seamlessly. The end result is stunning!

Sohaib Afzal

12:56 09 Apr 25

Highly recommended. Professional and high quality work.

Armani Zachariah

03:49 08 Apr 25

We needed a full refurbishment of our house, including a loft conversion, a new kitchen, and two new bathrooms. Master Builder handled everything with absolute professionalism. Their team worked tirelessly to deliver high-quality results while keeping everything on schedule. The communication was excellent, and they provided great advice throughout the process. The final result is stunning—our home now looks like something out of a magazine! Would definitely use them again for future projects.

A Google User

02:00 07 Apr 25

We purchased an old 5-bedroom house that needed a full refurbishment, including new flooring, electrics, plumbing, and an extension. Master Builder handled everything from start to finish with professionalism and expertise. They transformed the entire house into a stunning modern home. The new bathrooms are elegant, the kitchen is spacious and stylish, and the overall finish is outstanding. The entire project was well-managed, and the team was always approachable and transparent. Worth every penny!

Tia Randy

20:18 05 Apr 25

They recently completed a full renovation of our home, including a brand-new kitchen, bathrooms, and a rear extension. The attention to detail was impressive, and the quality of workmanship was top-notch. They worked efficiently, ensuring minimal disruption, and completed the project on time.

Dahlia Kristen

19:55 04 Apr 25

The team handled our loft conversion brilliantly. They worked diligently, paid attention to detail, and made sure we were happy with every step. No hidden costs, no delays—just great work. Wouldn't hesitate to hire them again.

Oswaldo Gretchen

19:22 03 Apr 25

We had a fantastic experience with Master Builder. From the initial consultation to the final touches, they were responsive and always available for any queries. The craftsmanship is excellent, and they delivered exactly what was promised.

Jimena Freddie

12:12 02 Apr 25

We hired them for a full refurbishment and extension of our 5-bedroom house, and the results are beyond our expectations! The team was professional, punctual, and incredibly skilled. From the structural work to the fine details, everything was done with precision. They managed the entire process smoothly, keeping us informed and handling any challenges without stress. The new space is modern, functional, and beautifully finished. Highly recommend them for major renovation projects!

Garage Conversions — Project Photos

A selection of our garage conversion projects across Welwyn Garden City, Luton & surrounding areas

Garage Conversion

Frequently Asked Questions

Everything you need to know before getting in touch

What can a garage conversion be used for?

A garage conversion can be used for almost any purpose — home office, extra bedroom, playroom, gym, utility room or a self-contained annexe. We advise on the best layout and specification based on your intended use.

Do I need planning permission for a garage conversion?

In most cases no — garage conversions fall under permitted development and do not require planning permission. However if your property is in a conservation area or is a listed building, permission may be required. We will advise during the site visit.

How much does a garage conversion cost?

Garage conversion costs vary depending on size, intended use and specification. We take on garage conversion projects starting from £5,000. Every project receives a detailed written quotation after a free site visit.

How long does a garage conversion take?

A typical garage conversion takes 2 to 4 weeks depending on the scope of work and intended use. We provide a realistic timeline in every written quotation before work begins.

Will the conversion be properly insulated?

Yes — always. We fully insulate floors, walls and ceilings to current building regulations standard. This ensures the converted space is warm, comfortable and energy efficient year round.

Do you handle electrics and plumbing in garage conversions?

Yes. We manage all trades in-house including electrics, plumbing, plastering and decoration. If your conversion requires a new consumer unit connection, heating or plumbing we handle all of it.

Does a garage conversion add value to my property?

Yes — a well-executed garage conversion typically adds significant value to a property by increasing usable living space. It is one of the most cost-effective home improvements available.

Are you fully insured for garage conversion work?

Yes. We carry full public liability insurance and employers liability insurance covering all garage conversion work. Documentation is available on request.

Ready to Convert Your Garage?

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