Extension Builders in Stevenage

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4 (8 reviews)

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Some of our top rated extension builders in Stevenage

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Shonan carpentry and building services
Rating: 5 out of 5
Extension Builder in Stevenage
I’m a Qualified NVQ Carpenter and joiner with 17 years experience in residential and commercial construction industry. I lived in Japan for 3 years and whilst there learnt Japanese carpentry skills. I pride myself in making sure the customer is happy and the quality of my work is second to none. communication between customer and myself is key to making sure the job runs smoothly. Carpentry Maintenance Kitchen fitting Wood flooring Refurbishment
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Latest review:
I have employed Jordan Wade many times to work on my properties, his primary trade is a fully qualified carpenter, though any other activity such as plaster boarding and kitchen installations that he has carried out for me has been of top quality. He's always on time and has never let me down when he says he will turn up, he turns up, I can certainly highly recommend Jordan
SJC Buiders
Rating: 4.3 out of 5
Extension Builder in Stevenage
GENERAL BUILDER
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Latest review:
Extensions- 13 May 2025
Steve and his team are great. From the initial enquiry through to completion Steve was prompt, professional, friendly and communicated continuously. Completed the job to a high standard and Im really happy with the finished porch. I would definitely use Steve again if I need any further work done. Very reliable. Thank you
Urwin services
No reviews yet
Extension Builder in Stevenage
We are a driveway clearance and demolition specialist, all aspects of clearance and demolition undertaken, competitive rates clean and efficient working in home counties and north London
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Range development
No reviews yet
Extension Builder in Stevenage
Hi
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Yew Tree Projects
No reviews yet
Extension Builder in Stevenage
Yew tree projects is a small family business. We are competitive with our quotes and we take pride in making sure your project runs as smoothly as possible and with as little disruption to your life as we possibly can. We are friendly and approachable and will always do our best to advise and help you to make decisions based on our experience. We try to add a personal touch and keep you fully informed of what’s happening as the project moves forward.
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Ervis
Rating: 5 out of 5
Extension Builder in Stevenage
We take on all kind of work that you need to do. We have been doing this for almost 8 years. We even do foundations digging muck away etc. Please do contact us for any further information we more then happy to answer.
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Latest review:
Handyman- 22 Dec 2025
Was very quick to respond and complete this job 3 hours later. To a high standard.
Elite Home Improvements
Rating: 5 out of 5
Extension Builder in Stevenage
We are a family partnership who have over 17 years experience in home improvements. We use only our certified and trusted tradesmen to carry out work to a very high standard. Elite Home Improvements are proud of the work we do and the service that we deliver.
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Latest review:
Extensions- 31 Oct 2017
Ant and team were brilliant. They turned up on time and left the house clean when they were done for the day. More than happy to help us with any problems and put up with us changing our mind a few times. Would highly reccomend.
JCL Renovations Ltd
Rating: 5 out of 5
Extension Builder in Stevenage
We are a construction with over 20years experience between the team, We undertake all aspects of renovation work including house renovations and extensions. We also have extensive experience in laminate, hardwood flooring and decking installation. We offer a solution for any projects from start to finish all in one place.
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Latest review:
Repointing- 23 Jan 2020
Job well done. Will definately use in the future.
Mng Roofing Ltd
Rating: 5 out of 5
Extension Builder in Stevenage
Welcome to Mng Roofing Ltd – Your Local Roofing & Building Experts With over 20 years of experience, we’ve built a reputation across London and surrounding areas for reliable, high-quality construction and roofing services. Every job is handled by our trusted in-house professionals — we’re here to protect and enhance your home with care and precision. We specialise in: 👉 New Roof Installations – flat and pitched roofs in slate, tile, felt, bitumen, and modern PVC membranes. 👉 Roof Repairs & Maintenance – from small leaks to major refurbishments. 👉 Fascias, Soffits & Guttering – installation, replacement, and professional cleaning. 👉 Garage & Extension Roofs – tailored solutions for outbuildings and home extensions. 👉 Leadwork & General Roofing Services – high-quality lead flashing, detailing, and associated building work. 👉 Extensions – full design-and-build services to increase your living space and add value to your property. 👉 Loft Conversions – transforming unused lofts into bright, functional rooms while ensuring Building Regulations compliance. 👉 Outhouses – bespoke garden buildings designed and built to suit your needs, from offices to relaxation spaces. Whether you're dealing with a leak, planning a renovation, or considering a full extension or conversion, we tailor our work to suit your property and budget. We’re proud to offer honest advice, expert craftsmanship, and guaranteed results. When you choose us for your project, you’re not only getting skilled workmanship — you’re also fully protected by comprehensive insurance cover: ✅ Employers’ Liability (£10 million): Protects our team while they work on your property. If any of our staff are injured, you’re never at risk of being held responsible. ✅ Public Liability (£5 million): Covers accidental damage or injury to third parties. For example, if a falling tile damages a neighbour’s car, you’re completely protected. ✅ Products Liability (£5 million): Ensures you’re covered if any of the materials we supply and install turn out to be faulty or cause damage. In simple terms, our insurance gives you total peace of mind: whatever happens, you’re financially protected, and your property is in safe hands. 🤝 If you're looking for a builder and roofer who values safety, quality, and customer satisfaction—let’s talk. 📞 Feel free to message me now to arrange a free site visit and no-obligation quote.
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Latest review:
We recently had Mng Roofing Ltd carry out a new flat roof installation on our property, and we couldn't be happier with the results. From the first inspection to completion, the team were professional, reliable, and kept us updated throughout the process. The workmanship was excellent, and the site was left clean and tidy, and everything was completed on time. We now have peace of mind knowing our roof is watertight and backed by a guarantee. Highly recommend Mng Roofing Ltd to anyone needing quality roofing work done.
CPK Building & Maintenance
No reviews yet
Extension Builder in Stevenage
Hi, I'm chris from CPK building & maintenance we are a small building company, we take on all kinds of building and maintenance jobs offering a great affordable service. Over 15 years experience.
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Best Bond Brickwork & Construction
Rating: 5 out of 5
Extension Builder in Stevenage
I'm a fully qualified bricklayer with 12 years in the industry.Im Experienced in all aspects of commercial and residential types of brick/block work. Capable of completing extensions, garden walls,patios, pointing, fencing and plastering. I am a skilled tradesman with a good work ethic and work with a great team .Im happy to work with the client and get the job done to the highest possible standard and in the fastest time.
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Latest review:
Bricklaying- 27 Aug 2021
Mitch and his team were efficient at building the retaining wall in my garden, working on a Saturday to get the job done. The work was completed to a very high standard. The wall had to be left slightly unfinished in order for other works to happen first, so Mitch promised to come back and finish off the wall at no additional cost later in the week. After some chasing, Mitch came back to finish the wall by himself the following Saturday. This was also completed to a high standard. We would highly recommend Mitch’s service for an efficient, high standard output.
B H Construction
No reviews yet
Extension Builder in Stevenage
B H Construction can assist you with all aspects of the building trade including extensions, refurbishments, structural alterations and all other trades. We pride ourselves on our high standards of work and have many years experience in the trade. We work closely with a kitchen company if you require a kitchen refurbishment and we also fit bathrooms from fairly basic installations, to very high spec. Fully insured
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G.I.K SERVICES LTD
Rating: 5 out of 5
Extension Builder in Stevenage
G.I.K SERVICES LTD company is the best variant for you if you need any home renovation, flat remodelling or refubrishment. We undertake any kind of work for your property. We have the best team of experts, that have required experience and can take up each renovation project. If it’s already started – we will finish it.
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Latest review:
Painting & Decorating- 31 May 2023
Great job - very professional and came over at a moments notice - highly recommended
Arch Construction and Project Management Ltd
Rating: 5 out of 5
Extension Builder in Stevenage
Arch Construction and Project Management Ltd is specialist of structural engineering, structural alterations,restoration, extensions, loft conversions and in middle&large sized projects on highest standard. We offer full building site and/or project management from concept to completion based on 22 years experience in construction industry with hassle and frustration free experience.
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Latest review:
Extensions- 12 Jan 2023
George and his team did an excellent job in building our extension and dealing patiently with our requests or changes. We had weekly face to face meetings with George and he would respond promptly to any issue. A very professional approach to the build project and an excellent result of build quality.
ReformWorks Design Limited
Rating: 4.8 out of 5
Extension Builder in Stevenage
ReformWorks Design Ltd We have been in the building industry for more then 25 years. we refurbish huoses and build extensions your project can be as small as a kitchen or bathroom, or as large as a complete renovation
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Latest review:
Extensions- 19 May 2026
Very good builder, done a good job. You can 100% trust him to do the job.
NOVATE ACS LTD
Rating: 3 out of 5
Extension Builder in Stevenage
NOVATE ACS LTD, you can see more detail on our services on our website. We are an innovative design led London based Chartered RIBA Architectural Practice and an Accredited Construction Company. We specialise in home extensions, loft conversions, refurbishments and new builds
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Latest review:
Architecture- 21 Dec 2024
Good rating and very helpful.

Top rated Extension Builders

Our Extension Builders in Stevenage, are rated 4 out of 5 based on 8 reviews from customers like you.

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Easily find verified local tradespeople. Just post your job to get quotes from tradespeople near you across the UK.

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

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 Stevenage 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 Stevenage who are available and interested can respond to your post.

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

What are the hourly rates of extension builders in Stevenage?

Before getting started with your extension project, it’s important to have a clear budget in place. On average, extension builders in Stevenage 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 Stevenage extension builders near you on MyBuilder. This allows you to compare what each quote covers and how much your Stevenage home extension project is likely to cost.

Find extension builders in Stevenage with MyBuilder

Hiring the right extension builder in Stevenage 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 Stevenage extension builders. Once your job is live, we’ll share it with home extension builders in Stevenage who can express their interest.

Step 2: Compare different extension builders in Stevenage

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

Step 3: Hire Stevenage extension builders with confidence

After gathering all the information and quotes from your chosen home extension builders in Stevenage, 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.

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

What to ask a Stevenage extension builder before hiring?

Before hiring an extension builder in Stevenage or extension building company in Stevenage, 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 Stevenage?

An extension builder in Stevenage 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 Stevenage 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 Stevenage?

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 Stevenage 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 Stevenage 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 Stevenage

Can an extension builder in Stevenage help with planning permission?

Yes, many extension builders in Stevenage 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 Stevenage handle everything from design to construction?

Many Stevenage 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 Stevenage help with materials and finishes?

Yes, most extension builders in Stevenage 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.