Extension Builders in Watford

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 3.5 (11 reviews)

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Some of our top rated extension builders in Watford

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Zenstruction
Rating: 5 out of 5
Extension Builder in Watford
Established in 2005, we are a trusted building company with extensive experience in all aspects of construction, from new builds to fascia and gutter installations. Known for delivering high-quality projects on time and within budget, we maintain the highest standards of workmanship, safety, and reliability. Our expertise spans a wide range of services, ensuring that each project is completed to exceptional standards, meeting both client expectations and industry regulations.
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Latest review:
Extensions- 3 Sep 2018
Zen has helped transform our home, we’ve drawn a lot of confidence from his considered approach and thorough work ethic. He’s so far addressed the cause of cracks to exterior walls of our property and has provided lasting solutions. We also asked him to plaster our hallway and update the banisters for us, Zen has done a great job of reinforcing the strength of the original features whilst retaining the property’s character. Very good with pets too. Looking forward to the next project.
Ovi
Rating: 5 out of 5
Extension Builder in Watford
Ovi the builder offers a comprehensive service specialising in loft conversions, extensions and refurbishments. We hold over 20 years experience within the construction industry, providing a high standard of work focusing on quality and ensuring a job well done.
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Latest review:
Plastering- 22 Feb 2026
Completed the job on time and as described. No issues and good workmanship. Would recommend
Plasterer
Rating: 5 out of 5
Extension Builder in Watford
With over 9 years experience and a real focus on customer satisfaction, our team of experienced professionals will produce a smooth finish every time on your walls and ceilings. We also do all aspects of rendering and EWI SISTEM (external wall insulation ). Always on time and on budget.
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Latest review:
Insulation- 5 Sep 2024
Fantastic work by Andrei, Ciprian and their team. Highly skilled and hard working team, starting on time (8am) every day and working until late, clear communication as the job was progressing, clear and fair pricing, attentive to details, and happy to accommodate non-standard request like 100mm EWI. Highly recommended!
Aurelian
Rating: 5 out of 5
Extension Builder in Watford
Hi we are" Probuildynamics" more photos can be check via FB or or company website.
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Latest review:
He is very methodical and does the solid work . No short cut and messy work.
TGS Design and Build Ltd
Rating: 5 out of 5
Extension Builder in Watford
We take on projects large or small, and approach them all with the same diligence and attention to datail. Every project is special for us. We don't consider a job finished until the customer is completely satisfield. OVER 10 YEARS OF EXPERIENCE IN UK - FULLY INSURED
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Latest review:
Extensions- 22 Dec 2022
Double side extension and rear, bi folds and sky light. Gabi was great start to finish, always on hand to help and was quick and reliable. Couldn’t fault any work they done for us, very happy. I would hire him again to do more work for us.
Bogdan Alexandru Oita
Rating: 5 out of 5
Extension Builder in Watford
Professionalism, promptness and honesty for a fast, clean and always quality service. Please note that shortlisting me, based on the information you provided on the MyBuilder website about your job, will incur a fee I must pay, ranging from £7 to £60 + VAT. Therefore, I kindly request that you carefully consider your genuine interest in proceeding with this job before adding me to your shortlist.
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Latest review:
Bathroom Fitting- 2 Dec 2025
Excellent service. Bogdan is very professional, clear communication and goes above and beyond to make sure the job is completed to a high standard. Would definitely hire him again
Ethan ansell
Rating: 5 out of 5
Extension Builder in Watford
Hello im Ethan, a fullyqualified bricklayer with 15 years experience of erecting brickwork. I am very proud of every job i have carried out and i build with pride. I ensure nothing less then the highest quality of work and a fully satisfied customer. I look foward to building for you whoever you are.
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Latest review:
Bricklaying- 8 May 2021
Ethan did an excellent job for us today. Very impressive brickwork. Nice friendly guy and left the place clean and tidy after finishing. Will not hesitate to use him again for future work.
GpmBrickwork ltd
Rating: 5 out of 5
Extension Builder in Watford
GpmBrickwork Ltd Extension garden walls all types of Brickwork Patios Chimney repairs New builds
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Latest review:
Bricklaying- 8 May 2026
Gordon was amazing. He came within a few days on a weekend to repair the steps as they were dangerous. He did a great job, also repairing loose brickwork on a wall at no extra charge. Very reasonable price too. I can recommend him and will definitely contact him again for brickwork jobs.
360Build Solutions Ltd
Rating: 5 out of 5
Extension Builder in Watford
360Build Solutions Ltd - specialised in Extensions (single or double storey), Conversions - Loft, Garage, Full Refurbishments including Kitchens, Bathrooms, Home Cinema and complete New Builds - Home Office, Gym. We deliver top quality of work and we always look at many options to come to the most logical and profitable solutions for our clients and to build long and lasting relationships. Free site visits and Estimates - learn more about us in About...
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Latest review:
Extensions- 17 Nov 2019
Marius is the best builder ever! I can not recommend Marius enough, if he can do your job I would bite his arm off! He and his team are hard working, efficient and tidy. Nothing was too much trouble, the job barely ran over schedule and I now have the most fabulous new home! This is the way building work should be done!!
Palm Real Estate Ltd
Rating: 4.9 out of 5
Extension Builder in Watford
I'm Mohsin from Palm Construction With over 7 years of experience in the industry, we've honed our skills to perfection. Whether you're looking to renovate or enhance your home, we are here for you. We take pride in delivering exceptional results and ensuring your project is completed on time and within budget. From minor fixtures to major refurbs, we've got you. No job is too big or too small, and we've dedicated to providing personalised solutions that meet your unique needs.
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Latest review:
Polite
Flori and partners
Rating: 5 out of 5
Extension Builder in Watford
Bricklayer with a vast experienced 25 years in building with the help of experience tradesmen and to finish the job and good quality and reasonable time as well as doing other trades with good rates
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Latest review:
Bricklaying- 5 May 2025
Small garden wall built. Competitively priced, excellent comms and very punctual. Thank you for the superb workmanship
AMP Builder Ltd
Rating: 5 out of 5
Extension Builder in Watford
With over 10 years of experience in the building and construction industry, I offer a wide range of services, including loft conversions, extensions, HMO (House in Multiple Occupation) refurbishments, as well as painting and decorating and flooring solutions. I am also an HMO expert (working with care homes for past 7+ years), with extensive experience in converting properties into high-quality, compliant rental spaces. Whether you're a property investor or landlord, I can help you turn a standard home into a profitable HMO, while ensuring it meets the latest building regulations. In addition to my expertise in lofts and HMOs, I provide a full range of building services, including extensions to increase your living space, flooring installations (including hardwood, laminate, and tile), and high-quality painting and decorating to give your home or business a fresh, professional finish. I take pride in delivering reliable, high-quality work with attention to detail, clear communication, and a commitment to meeting deadlines. Whether you're planning a renovation, an extension, or a full-scale conversion, I’m here to turn your vision into reality. Let’s get started on your project today!
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Latest review:
AMP builders with Mehul at the helm have been fantastic with the building contracting work. Very reliable, dependable and innovative. He has been doing our work for our home on a regular basis for more than 10 years and we have always had super experience.
PJS Builders
Rating: 5 out of 5
Extension Builder in Watford
30 years experience Extensions Loft conversions Refurbishments Maintenance Decorating Fully insured Friendly service
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Latest review:
Extensions- 22 Aug 2022
PJS and Paul were fantastic. They kept us informed at all stages of the build, were quick and efficient, offered sensible suggestions when we discussed different parts of the build and did not force their opinions or thoughts, just explained what would happen for the different choices that were available. All rubbish was cleared away afterwards and the project was finished within time and budget. We are very happy with the final result. No problems with them at all, would heartily recommend Paul Johnson for your building work.
Made Innovate Constuction & Reform
Rating: 5 out of 5
Extension Builder in Watford
We are what we would like to call a complete construction company. Due to many years of success and co-projects, we partnered with a Structural Engineer to provide a hassle-free, top-notch service and projects. We have over 30 years of experience with a team of experts who specialize in construction management, design, and build services.
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Latest review:
Andre undertook a seemingly impossible task within my own home. They transformed my down stairs storage in a w.c, the gas lines were repositioned, he and his tem also built an outdoor storage area. Their honesty, dedication, and commitment to finding the best solutions both in terms of cost and quality were truly exceptional, they transparently outlined the challenges and worked tirelessly to deliver results that went beyond expectations. I totally recommend Andre and his team if you are looking for a highstandard professioanal that really cares about people and getting the job done!
Shane Devine Bricklaying and Building services
Rating: 5 out of 5
Extension Builder in Watford
Hi my name is Shane I am a bricklayer who undertakes all aspects of brickwork as well as ground works steel works patios concrete bases driveways extensions I have a team who I bring in for all aspects of construction to do work at a first class standard no job to big or small i have worked in the construction industry for 17 years
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Latest review:
Bricklaying- 13 Oct 2018
Excellent work by Shane and his plasterer to complete work and it was also ahead of schedule too. Great final finish and they both tided up after the work was complete. Throughout there was constant contact with Shane and the date for the work was timely and efficient. We would definitely use again.
Herts construction services Ltd
Rating: 5 out of 5
Extension Builder in Watford
Welcome to Herts Construction Services Ltd. A family run business with over 20 years of construction experience we offer a variety of construction services. From concept to completion we at Herts Construction pride ourselves on delivering a professional service with excellent quality at very competitive prices. Consistently delivering customer satisfaction we have gained and maintained an envaluable reputation through word of mouth referrals.
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Latest review:
Roofing (Flat)- 14 Mar 2022
Delighted with the roof work, replacement tiles and fixing of wall/roof holes following last months storm. Miri worked diligently throughout and stuck to his word at each stage. Fair prices, kept me informed and genuinely a really nice guy. Please feel free to message me for more information.

3.5

Top rated Extension Builders

Our Extension Builders in Watford, are rated 3.5 out of 5 based on 11 reviews from customers like you.

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What types of services are offered by local extension builders in Watford?

Building an extension is a major milestone for any home. It’s not just about adding extra space, it’s a big step that can transform how you live day to day, opening up new possibilities for comfort, lifestyle, and family needs.

This is why it’s so important to find the right extension builders in Watford for you. They can help with a variety of tasks and projects, including:

Extending your home with an extra room
Two+ storey extensions
Adding partition walls to create more rooms
Building annexes or external structures

To find the right extension builder near you, simply post your job on MyBuilder. Explain the type of help you’re looking for, and then home extension builders in Watford who are available and interested can respond to your post.

Browse profiles, read customer reviews and get quotes from your chosen Watford extension builders, all before you decide who to hire.

What are the hourly rates of extension builders in Watford?

Before getting started with your extension project, it’s important to have a clear budget in place. On average, extension builders in Watford will charge between £16 and £42 per hour.

Single-storey rear extensions cost between £20,000 and £60,000 depending on size and finish.
The cost of double-storey extensions, which add more space and value, can range from £100,000 to over £170,000.
Larger wrap-around extensions that combine multiple extension types can range from £40,000 to over £120,000.

The cost of an extension will vary depending on your property. For instance, extending in certain areas may require structural adjustments to ensure stability, which can increase your material and labour costs.

To get an accurate price for your home extension, request detailed quotes from several Watford extension builders near you on MyBuilder. This allows you to compare what each quote covers and how much your Watford home extension project is likely to cost.

Find extension builders in Watford with MyBuilder

Hiring the right extension builder in Watford with MyBuilder couldn’t be easier. Just follow these simple steps:

Step 1: Post your extension project on MyBuilder

Whether you’re planning a single-storey extension, a loft conversion, or adding a new room, post your job on MyBuilder to find local Watford extension builders. Once your job is live, we’ll share it with home extension builders in Watford who can express their interest.

Step 2: Compare different extension builders in Watford

When you start receiving interest, review profiles of local Watford extension builders, check their previous work, and read real customer reviews. Ask about timelines, materials, and request detailed quotes.

Step 3: Hire Watford extension builders with confidence

After gathering all the information and quotes from your chosen home extension builders in Watford, compare their experience, guarantees, and costs before choosing who to hire.

You’ll also have confidence knowing that every tradesperson on MyBuilder is verified through several checks, including:

ID verification: When a tradesperson joins MyBuilder, we ask for a valid ID, such as a passport, ID card, or eIDAS certificate.
Company verification: For tradespeople operating under a company, we make sure every tradesperson has a registered business.

Did you know? Our continuous monitoring and complaints process ensures that tradespeople who don’t meet our standards are promptly removed from MyBuilder’s platform.

Watford extension builders are ready to help. Use MyBuilder today to find the right professional for your home extension.

What to ask a Watford extension builder before hiring?

Before hiring an extension builder in Watford or extension building company in Watford, ask a few key questions to make sure you’re choosing the right professional for your home extension project.

What qualifications and experience do you have as an extension builder in Watford?

An extension builder in Watford should have a strong track record with similar projects and relevant building qualifications or trade memberships, such as the Federation of Master Builders (FMB) or TrustMark.

Will my home extension meet all building regulations and planning requirements?

Your Watford extension builder should ensure the project complies with Building Regulations and, where necessary, handle or assist with planning permissions. Ask how they manage building control inspections and what documentation you’ll receive once the project is complete.

What experience do you have with similar extensions in Watford?

Ask to see examples of their previous work, or view examples of their work on MyBuilder. Ideally projects similar to yours in scale and design. This helps you assess the Watford extension builder’s ability to deliver a result that meets your expectations.

How long will the extension take to complete?

Extension project timelines can vary depending on size, complexity, and weather. A typical single-storey extension might take around 8 - 12 weeks. Request a detailed schedule so you know what to expect and when key milestones will be reached.

Do you offer a guarantee for your work? Most Watford extension builders offer a guarantee or warranty on their work, often between 1 and 10 years depending on the project and materials used. This gives you assurance that any issues will be resolved after completion.

If you still have questions about the professional you are looking to hire, we have a full detailed guide on hiring the right builder here.

FAQ: Common questions about home extensions in Watford

Can an extension builder in Watford help with planning permission?

Yes, many extension builders in Watford can guide you through the planning process. They can help prepare drawings, advise on local requirements, and liaise with your local council to ensure your project meets all necessary regulations.

Can an extension builder in Watford handle everything from design to construction?

Many Watford extension builders offer full design-and-build services, managing both the architectural planning and construction stages. Ask your builder whether they can provide a complete package or if you’ll need to hire an architect or designer separately.

Will an extension builder in Watford help with materials and finishes?

Yes, most extension builders in Watford can source materials and offer advice on finishes that suit your design and budget. You can also choose to supply certain materials yourself, just make sure this is agreed upon before work starts.