Extension Builders in Northampton

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 Northampton

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Cole Builders
Rating: 5 out of 5
Extension Builder in Northampton
Hi im Ben from cole builders Were a family run company from Newport Pagnell , Milton Keynes . We only take one job on at one time and complete the work ourself ...
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Latest review:
Kitchen Fitting- 6 Dec 2015
Ben did a great job on a complete kitchen refit
AP Smith Building Services
Rating: 5 out of 5
Extension Builder in Northampton
Hello my name is Adam. I am an experienced general builder in all aspects of construction. There is no job to big or to small my work ranges from brick and block work to full extensions, brick work repairs and repointing,all aspects of carpentry, new patios, patio relays, block paving, roofing, fencing, all aspects of landscaping, block paving, full garden makeovers, floor screeding, flooring,facias and soffits, guttering, kitchen fitting bathroom fitting, small plumbing and electrical works.
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Latest review:
Repointing- 5 Nov 2020
Adam responded to our advert within a couple of hours and came over the same day to provide a quote which we accepted. He was very professional in his approach and explained what was needed to be done. His workmanship was exceptional and he ensured that the areas were kept clean and tidy once he had completed the job. We would highly recommend him and would have no hesitation in using him again.
MJG
Rating: 4.5 out of 5
Extension Builder in Northampton
I have been working in the building industry a long time now and we have carried out many contracts big or small from extensions to bathrooms. I have a small group of guys that i always work with and trust to always deliver a great job for the customer.
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Latest review:
Extensions- 8 May 2025
Matthew is not good on communication but the work his team do is outstanding
MG Home Improvements
Rating: 4.4 out of 5
Extension Builder in Northampton
MG Home Improvements is a trusted, local carpentry and home improvement business based in Kettering, covering Northamptonshire and surrounding areas within a 40-mile radius. With over 40 years of experience, we specialise in kitchen fitting, internal doors, stair repairs, skirting, and all aspects of carpentry work. Whether it’s a full kitchen installation or smaller jobs around the home, we take pride in delivering high-quality workmanship with attention to detail and a reliable, friendly service. No shortcuts—just solid, dependable work you can trust.
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Latest review:
Carpentry- 19 Aug 2026
Not being started until 4th September
Finlay Clive Carpentry & Construction
Rating: 4.5 out of 5
Extension Builder in Northampton
The carpenter you need to get the job you want done, everything from First Fix (Stud, Roof work, etc) to Second Fix (Door, Flooring, Skirting & Architrave, etc). My knowledge and expertise also extends past wood work into plaster, ground, brick work and CAD where depending on how you want a certain job to look aesthetically, we can design it before it’s built to achieve the result you want. Insured, qualified and willing to give the best service possible.
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Latest review:
Extensions- 15 Jan 2025
Finlay did work to a high standard and quality. However, he was repeatedly unable to meet agreed timelines and was much slower than other contractors to complete the work. The project also ended up costing much more than originally quoted. We ended up having to terminate our contract and finish the project with other contractors. This was disappointing as Finlay is a lovely guy.
B.Eales building contractors
No reviews yet
Extension Builder in Northampton
B.Eales building contractors offer a professional, polite and reliable service who like to work one on one with the client, to ensure they get the highest possible standard for the job in hand. We have over 12 years+ experience in the trade that we love doing, brickwork, stonework, slabbing, Extentions, renovations and much more Free quotes and advice
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New Era Building Ltd
Rating: 5 out of 5
Extension Builder in Northampton
We are a small but competent building company who undertake house building, extensions, brickwork and carpentry. We enjoy building one off houses from start to completion. We have an excellent resume of completed projects. We carry Contractors All Risk Insurance.
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Latest review:
Extensions- 14 Mar 2021
It was a pleasure having Simon and his team building my extension. The work started as per the agreed date and completed ahead of schedule. I would certainly use this company again in the future and would highly recommend them.
Sorzano's Plumbing and Construction Limited
Rating: 5 out of 5
Extension Builder in Northampton
Welcome to Sorzano’s Plumbing & Construction Ltd, where excellence meets craftsmanship. Founded by Peter Sorzano, our company was born out of a passion for delivering top-tier plumbing, renovation, and construction services. Our goal is to be the most trusted partner for homeowners wherever we build. We are driven by a mission to deliver exceptional craftsmanship and a service experience that exceeds expectations. We believe that high-quality work should be standard, not a luxury. That is why we combine our decades of experience with a promise of reliability. We treat your home as if it were our own, ensuring clean sites, clear communication, and results that last. We construct comfort and create value, backed by our comprehensive 12-month guarantee.
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Latest review:
Peter Sorzano and his team were very considerate and professional. They were always approachable and accommodated our family needs whilst the work was behind done, completing the work to a high standard. I am very happy to recommend them
M.C Plastering
Rating: 5 out of 5
Extension Builder in Northampton
Plasterer with 10 year experience.
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Latest review:
Plastering- 27 Oct 2020
We're very happy with the finished job. Makles arrived on time and got on with the job very efficiently. To our eyes, the ceiling finish looks very good and such an improvement over the original Artex. Recommended, and would hire again.
S.J Dunphy Construction
Rating: 4.5 out of 5
Extension Builder in Northampton
I'm a local friendly builder from Buckingham, I've been in the building industry for 10 years. In these years I've gained experience as a bricklayer nvq level 2, groundworks, machine drive and much more. I've also taken on many projects from extensions, new builds, barn conversion, garage conversions and much more. Please don't hesitate to ask for more information.
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Latest review:
Extensions- 11 Nov 2018
Great builder. The initial quote is the price charged. He has a great work ethic, very professional and provided us with a really good quality finish and the project was completed on time. The contractors he brought in for plumbing, electrics and plastering were also all fantastic. We are really pleased and would thoroughly recommend Sean.
Mark Kirtland Building Services
Rating: 5 out of 5
Extension Builder in Northampton
I'm a local builder with over 25 years experience. I offer a complete range of building services from garden walls/Patios to larger projects like extensions,renovations,conversions.
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Latest review:
Extensions- 16 Oct 2018
Mark completed a two room single story extension to our 19thC barn conversion and assisted with preparation work for a kitchen installation. He is professional, reliable & easy to work with and the quality of his workmanship is excellent. We are delighted with the end result and I would not hesitate to recommend his services.
DG Carpentry
Rating: 4.8 out of 5
Extension Builder in Northampton
Simple, honest, reliable carpenter
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Latest review:
Carpentry- 5 Jun 2024
Just as wanted. He did a great job, very professional.
RJ Construction
No reviews yet
Extension Builder in Northampton
RJ Construction Design.Build.Maintain . For more than 30 years we have provided a comprehensive Building , Maintenance and Hard Landscaping service in and around Northamptonshire, In addition we have featured on Kirstie & Phils Love it or List it on Channel 4. We have constructed everything from New Build houses and extensions to cellar and loft conversions during our 30 plus years, we also supply and fit kitchens and bathrooms.
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PH Design & Build Ltd
Rating: 5 out of 5
Extension Builder in Northampton
With over 15 years construction experience working on traditional and timber frame construction development's, we have recently set up a new construction company PH Design&Build Ltd in 2021 to establish and grow a quality assured, right first time application to general domestic renovations or home improvements, extensions and new build projects.
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Latest review:
Bathroom Fitting- 13 Mar 2022
Paul came to quote on an ensuite which he said was not possible after a number of assessments. I made Paul aware of works I planned for the garden and bathroom and a few other bits. If you went someone that is; consistent, timely, has defined cost (regular has updates on costs and possible variances), honest, good quality finish, then Paul is your guy. Our bathroom is to a very high standard with a very detailed finish across all areas With regards to the garden. It was like a swap, no drainage and just clay. Paul came up with a detailed plan as to how he would resolve it, which he did. Communication 10 Time 10 Quality 10 Pricing 10 Consistency 10 Personality 10 It's a shame my builder doesn't allow pictures to be uploaded....
JA Brickwork
Rating: 4.8 out of 5
Extension Builder in Northampton
we are a small company based in Milton Keynes We also undertake extensions / general building works undertakern.... Public liability assured.. City and guilds assured.. Neat and tidy friendly company's.... Health n safety certificate blue card bricklayers credentials card
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Latest review:
Bricklaying- 12 Feb 2026
I hired JA Landscaping and Brickwork to build a garden retaining wall and complete patio tiling. Unfortunately, my experience with John (Jay) was very disappointing. The work was left unfinished, and the site was left in a very poor condition; even my front driveway is fully messed up with 8-10tons of waste. Despite claiming over 25–30 years of experience, the work was not properly assessed or managed, even though he was already working on a retaining wall next to the patio project at the same property and location. Although John refunded the waste removal charges £450, even that didnt covering full waste removal, the remaining unfinished and corrective work is costing me approximately 40% more than originally planned. This has made the overall project financially difficult and stressful. Based on my experience, I would not recommend this company, particularly for medium to large projects over £1k, as I do not feel they are capable of handling larger jobs professionally.
Chris Searcy
Rating: 5 out of 5
Extension Builder in Northampton
I’m a bricklayer/general builder with 20 years experience and I can lay bricks/ stone , slab laying , repointing ,concrete jobs , driveways etc
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Latest review:
Repointing- 22 Oct 2019
Chris was very friendly. Communicated really well about when the work could be completed and did a very nice job

4.5

Top rated Extension Builders

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

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

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

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

What are the hourly rates of extension builders in Northampton?

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

Find extension builders in Northampton with MyBuilder

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

Step 2: Compare different extension builders in Northampton

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

Step 3: Hire Northampton extension builders with confidence

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

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

What to ask a Northampton extension builder before hiring?

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

An extension builder in Northampton 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 Northampton 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 Northampton?

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 Northampton 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 Northampton 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 Northampton

Can an extension builder in Northampton help with planning permission?

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

Many Northampton 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 Northampton help with materials and finishes?

Yes, most extension builders in Northampton 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.