Extension Builders in Northamptonshire

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.5 (4 reviews)

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Some of our top rated extension builders in Northamptonshire

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George Apostol ltd
No reviews yet
Extension Builder in Northamptonshire
General construction skills
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Jaku construction ltd
No reviews yet
Extension Builder in Northamptonshire
Everything started as a family business, but now we are doing good
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Green Ark Ltd
No reviews yet
Extension Builder in Northamptonshire
Green Ark specializes in one off developments. We are client focused and have a track record of delivering turn key projects. So if you have plans for your dream home, whether that's a small extension or a complete new build, we can get it built.
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Orion
No reviews yet
Extension Builder in Northamptonshire
Here at Orion the sky isn’t our limit, we reach for the stars and we would love to help you with your projects
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Paul smith Build
Rating: 1 out of 5
Extension Builder in Northamptonshire
Hi I am a general builder. I have been in the building for 22 years, trading for 6 years on my own through word of mouth and recommendation.I studied bricklaying at college and have a level 2 NVQ. I am also a plaster/Chippy/Groundworker/tiler all learnt from working along side other tradesmen.i also have a good team of other trades for the bits I don’t do and for bigger jobs. I take on all works from extensions to refurbs and landscaping.
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Latest review:
Extensions- 4 Jul 2022
Never finished job, took on too many builds elsewhere, put tiles roof on, leaked soo bad for two weeks, filled SIX 200 litre barrels, all insulating was wet and fell out. Roof had to be stripped and get a roofer in (Munton), Bricklayer didnt turn up for four weeks, and Paul didnt notice, called me to see if he had been in. Brickwork shocking (see website photo), Building inspector not called in latter half of build, no final inspection or sign off. Asked Paul for invoices, he cant supply me any invoices because he didnt keep records, Asked me what amount I would like putting down on an invoice. I had to pull down scaffolding on my own, in the middle of the night / dark and pouring rain, after being told it would be removed but no, Still up two weeks after being needed and it needed to be down as bifold doors were being fitted next morning, Paul wasnt interested. Build took about year and half to complete because he wasnt managing it and doing other projects. http://www.paul-smith-builders.co.uk/
PD Construction
Rating: 4.8 out of 5
Extension Builder in Northamptonshire
We offer a complete project management service for any construction project. Based in Daventry, Northamptonshire our services cover any jobs within an hour's radius from our location. With over a decade of valuable experience we have a close-knit team of highly skilled and qualified professionals. We pride ourselves on delivering exceptional customer service with competitive prices and a free quotation for our clients
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Latest review:
Conversions - General- 13 Sep 2024
All went well with our garage conversion as Perry followed all the instructions we gave him. The garage was converted to a very high standard and taste. We will surely recommend Perry to our friends.
SMH Homes Ltd
No reviews yet
Extension Builder in Northamptonshire
We are SMH Homes, we operate with our own skilled labour to manage and deliver your building projects. We can complete full cost analysis’s for your project and will project manage your home till completion.
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UNIVERSAL CONCEPTING LTD
No reviews yet
Extension Builder in Northamptonshire
Bathrooms Kitchens Conservatories Plastering Plumbing
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Westley Building Services Ltd
No reviews yet
Extension Builder in Northamptonshire
I am a qualified and experienced Tradesmen with years of experience working on a range of bathroom, conversion, renovation, groundworks and landscaping projects. I am reliable, providing high-quality workmanship, and pride myself on having honest communication with the client throughout the development to provide seamless end to end solutions. Based in Northampton, we operate all surrounding areas.
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ALPHA DESIGN AND BUILD NORTHAMPTON LTD
No reviews yet
Extension Builder in Northamptonshire
General building company.
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EBI building renovation
Rating: 5 out of 5
Extension Builder in Northamptonshire
15+ years industry experience specialising in building renovations and internal/external projects. Services range from building extensions to roofing and loft conversions.
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Latest review:
Bricklaying- 14 May 2026
A very professional builder who is competant, trustworthy, hard working, reliable, competetive and a caring person who will go out of his way to get the job done. I will highly recommend him to anyone looking for quality workmanship. I am a professional carpenter with over 45 years experience and rarely do i meet someone like Rob. I will certainly use him to do my work in the future.
BUILDING APM LTD
Rating: 5 out of 5
Extension Builder in Northamptonshire
Building APM Ltd Expert brickwork. Built to NHBC standards. Building APM Ltd is a professional construction company specialising exclusively in brickwork and structural masonry. We deliver high-quality work for house extensions, garages, and garden walls, built from foundation level up to wall plate, in line with NHBC standards. We focus on precision, strength, and a clean finish, ensuring every project is completed to the highest standard. Reliable, efficient, and detail-oriented, we take pride in doing the job right the first time. 🧱 Services • Brickwork for house extensions (substructure & superstructure) • Garage brickwork (full build up to roof level) • Garden walls (new builds & repairs) • Blockwork • Repointing & structural repairs • Wall demolition & rebuilding ⸻ ⚠️ Please Note We specialise in brickwork and masonry only. We do not carry out roofing or internal works. ⸻ ✅ What You Get ✔️ NHBC standard workmanship ✔️ Free quotes ✔️ Fast availability ✔️ Clean & tidy work ✔️ Honest pricing ✔️ Waste removal included
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Latest review:
Bricklaying- 28 Mar 2026
Great comms initially and they were able to do the job quickly. Arrived promptly as promised and did a great job. Really pleased and would thoroughly recommend.
Swiss Build Ltd
No reviews yet
Extension Builder in Northamptonshire
Swiss Build is a trusted construction and building services company delivering high-quality workmanship across residential and commercial projects. With a strong focus on precision, reliability, and customer satisfaction, we provide a full range of building solutions—from renovations and extensions to complete property refurbishments. As proud members of the Federation of Master Builders (FMB), we adhere to strict industry standards and best practices, giving our clients added confidence in the quality and professionalism of our work. Our FMB membership reflects our commitment to excellence, accountability, and continuous improvement within the construction industry. Our team combines skilled craftsmanship with modern building practices to ensure every project is completed to the highest standard, on time and within budget. We take pride in our attention to detail, clear communication, and commitment to exceeding client expectations at every stage. At Swiss Build, we believe in doing things properly the first time—building not just structures, but long-lasting relationships with our clients.
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R Lange Construction
Rating: 5 out of 5
Extension Builder in Northamptonshire
R Lange construction LTD is a building firm with over 10 years experience,and offers a friendly and professional service. My main goal is to provide excellent craftsmanship and and happy customer,we are also proud to be a member of the federation of master builders. Work normally undertaken is anything from small garden walls,extensions,structural wall removal,barn conversion and one of house builds.
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Latest review:
Extensions- 21 Jan 2018
From the outset we found Ryan to be punctual and polite - at the same time maintaining a good professional balance between friendliness and over-familiarity. The level of detail in his bid far exceeded the other two bids, which got him off to a good start - combined with the fact that he was also the lowest bidder, and a local builder to boot, made him the clear favourite for us. We were not disappointed. Throughout the job, Ryan and his team were very tidy workers, unfailingly good-humoured and always keen to please - nothing was too much trouble for them. In the end, the job did take a bit longer than we had anticipated however the quality of work was first class, and we were totally satisfied. We would not hesitate to employ Ryan again.
T Clarke Heritage Builders and Stonemason’s
Rating: 4.9 out of 5
Extension Builder in Northamptonshire
Hello ! After being dragged around stone pits and helping my father with his stone work for as long as I can remember I developed a real love and passion for stone and stone work in 2009 I was highly awarded in the stone Federation awards for my stone work on Norwich Cathedral judges comments were a complete understanding of natural stone work . I have my own stone saws and scaffold and come as a complete package .Period houses are a interest of mine and stone work is my passion .
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Latest review:
Stonemasonry- 3 Apr 2026
Despite the bad weather causing some unforseen delays, Tristan managed to do complete an excellent rebuild of the stone wall in very unclement conditions. I would definitely recommend him for any stone work jobs.
THOR CIVILS LTD
No reviews yet
Extension Builder in Northamptonshire
Thor Civils is building and civil engineering company based in Northampton 20 years experience new build, extensions ground work
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4.5

Top rated Extension Builders

Our Extension Builders in Northamptonshire, are rated 4.5 out of 5 based on 4 reviews from customers like you.

Quality screening

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 Northamptonshire?

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

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

What are the hourly rates of extension builders in Northamptonshire?

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

Find extension builders in Northamptonshire with MyBuilder

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

Step 2: Compare different extension builders in Northamptonshire

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

Step 3: Hire Northamptonshire extension builders with confidence

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

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

What to ask a Northamptonshire extension builder before hiring?

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

An extension builder in Northamptonshire 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 Northamptonshire 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 Northamptonshire?

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 Northamptonshire 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 Northamptonshire 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 Northamptonshire

Can an extension builder in Northamptonshire help with planning permission?

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

Many Northamptonshire 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 Northamptonshire help with materials and finishes?

Yes, most extension builders in Northamptonshire 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.