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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GB Framing & Building services
Rating: 5 out of 5
Extension Builder in Northamptonshire
A team of 3/4 multi skilled guys specialising in carpentry and plumbing and Bathroom/Kitchen installations with over 20 years experience. all aspects of carpentry and plumbing works undertaken, Gas safe engineers and unvented qualified. If your looking for a unique and personal service then look no further.
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Latest review:
Tiling- 15 Jun 2020
Gavin was great, very calm and relaxed. Just comes in and gets on with the job. His singing while he works is hilarious and he did a great job of tiling my bathroom. Would definitely recommend!
Glass Cube Design Ltd
Rating: 4.5 out of 5
Extension Builder in Northamptonshire
Twice recognised for an 'award winning' project, at Glass Cube Design and Architecture we provide services for properties, offices and other buildings. Also provide end to end project management on home developments. Over 35 years in designing plans, project management and property consultancy. Have done technical design, had approvals on listed buildings and greenfield sites for extensions and planning. Our prices are highly competitive and offer a free consultation to your home.
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Latest review:
CAD / Drawings- 15 Apr 2025
worst job done! left all beams and columns as it is on the plan which was meant to be hidden. DO NOT HIRE THEM
Regener8 Property Services Limited
No reviews yet
Extension Builder in Northamptonshire
Hi, At Regener8 Property Services, we are dedicated to providing top-tier property solutions that not only meet but exceed your expectations. Our commitment to excellence is unwavering, and we specialize in a wide range of services aimed at rejuvenating and enhancing your living spaces. *kitchen installations *bathroom fittings *carpentry *painting and decorating *flooring We look forward to helping you get the best for you. Team Regener8
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D&A east midlands property service LTD
No reviews yet
Extension Builder in Northamptonshire
We are property developers with several years of experience,members of the FEDERATION OF MASTER BUILDERS specialists in Extension Loft In collaboration with our team of specialists Architects, structural engineers, and building authorities, we are pleased to support your project from the beginning to the end. YOU DREAM IT.... WE BUILD IT...
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Michael Barrett
No reviews yet
Extension Builder in Northamptonshire
Highly motivated bricklayer who has a keen eye for detail and great knowledge coupled with a lot of drive to deliver the highest quality possible
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Ct building services
No reviews yet
Extension Builder in Northamptonshire
Extensions garden walls block paving slabing fencing
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NICUSOR-IONUT ALBU
Rating: 5 out of 5
Extension Builder in Northamptonshire
Need reliable, multi-skilled tradesmen for your home renovation? Our professional team offers a comprehensive range of services to transform your space with minimal hassle. We are experts in: Plastering: From minor repairs to full re-skims, we ensure perfectly smooth walls and ceilings ready for decoration. Tiling: Specializing in all materials—ceramic, porcelain, natural stone—for stunning kitchens, bathrooms, and floor finishes. Painting & Decorating: Meticulous internal and external painting with a clean finish, using quality paints for lasting results. We provide a seamless service, managing the transition from structural finishing to final decoration, which saves you time and coordination efforts. We are fully insured, highly experienced, and committed to delivering quality craftsmanship on every project.
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Latest review:
Very efficient work, arrived on time and finished as expected. Cleared any mess made and gave me a lovely smooth plastered ceiling. Definitely recommend, thank you.
jason platt
Rating: 5 out of 5
Extension Builder in Northamptonshire
We specialise in all aspects of building works, including extension, plumbing and carpentry, we do all other aspects of home improvements. We also have access to other trade likes plasterers and electricians that we work closely with. If needed we can run the process of the job from start to finish.
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Latest review:
Bathroom Fitting- 14 Nov 2018
Jason and Steve did a fantastic job. Jason ensured that I knew what they were doing each day and, when decisions needed to be made, we had a quick chat to make sure we were all on the same page. The work was completed to a high standard and any niggles/snags were dealt with quickly and without fuss. Both of them are polite, respectful and just really nice guys. I would definitely recommend them. In fact, I've already booked them to fit my new kitchen next year.
Lighthouse Crew Limited
Rating: 5 out of 5
Extension Builder in Northamptonshire
We are new business on the market although we are in construction for over 20 years. We are bringing experience from projects that we were working on throughout many years of service for commercial, domestic and insurance clients. We are offering kitchen and bathroom installation, hard floor fitting, refurbishments, complete remodeling, masonry repairs and structural repairs.We are aiming at complete refurbishments, extensions and conversions, including underpinning and structural strengthening.
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Latest review:
Joinery & Cabinet Making- 28 Oct 2022
Rafal was very helpful, and came up with alternative solutions to the job too from what I'd first suggested. He was prompt, cleaned up each day, and did a really good job which I'm very happy with. It was slightly worrying not to get a confirmed price for the work beforehand, just an estimate, but it turned out that was because it was hard to tell the time the job would take, and in the end what he did charge produced a really good result. I'd highly recommend him.
Proper Builders
Rating: 5 out of 5
Extension Builder in Northamptonshire
Proper builders! We are here to help your dreams come true. If you need home improvement, refurbishment, tiny repairs or even just an advice do not hesitate to contact us. We are a family company, professional and trustworthy. We always do our best to make our clients happy. Kitchen, bathroom, bedroom makeovers - that’s all we do every single day. We offer great service in competitive prices, innovative solutions and advices on every stage of the project.
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Latest review:
Restoration & Refurbishment- 20 Sep 2021
Proper Builders are proper builders! Pawel and his team went above and beyond our expectations when we tasked them with an upstairs bathroom conversion and utility room build. Having their expertise and vast knowledge was a godsend when it came to dealing with the aspects of our wonky Victorian house and our no-so-accurate measuring. It was also massively valuable to have their suggestions and ideas for certain aspects of our project which we overlooked. We are very happy with the end result - the team take great pride in their work and it shows. You can definitely entrust Proper Builders to undertake your plans - reliable, trustworthy, tidy and informative from start to finish. Although I advise to get in touch quick as it seems that my neighbours have been that impressed by their work half of my street is now enquiring with them!
Instant Builds
Rating: 5 out of 5
Extension Builder in Northamptonshire
We undertake all sort of construction jobs but specialise in two areas. Firstly we have over 10 years experience in wet underfloor heating systems and travel the country doing this work. We can complete every aspect of this job from start to finish including taking up flooring/ breaking concrete, laying the pipe work and connecting and testing the system. We are then able to repour concrete and/or fit the desired flooring. Secondly we specialise in External Insulation for properties and have a large portfolio of recent work completed. We are able to offer an extensive guarantee for the products used in this job. However, this is not all we do and have a wide portfolio of work including extension building, building garages and outhouses, roofing, kitchen fitting, groundwork, bricklaying, soffits and guttering, landscaping and small jobs like fitting flooring, plumbing, painting and decorating. We are happy to provide references for our work. Thank you
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Latest review:
Groundwork & Foundations- 20 Sep 2024
What was supposed to be only a concrete excavation job turned out to be a full UFH installation with insulation and screed on top. It was a big job but the team has managed very well. Good communication, flexible attitude and excellent work. I would highly recommend them.
A1HOME4U LTD
Rating: 5 out of 5
Extension Builder in Northamptonshire
Any structural jobs, extentions , driveways/patio, roof, guttering, plumbing, carpentary, tiling, etc
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Latest review:
Extensions- 4 Feb 2023
Tamara has a world of knowledge when it comes to construction. She did a 5 ft extension of our kitchen. She made recommendations that later came out really well. I would not hesitate to recommend her to anyone!
WRP LTD
Rating: 5 out of 5
Extension Builder in Northamptonshire
ALSEC General building, renovation and extension specialists serving the Midlands. Specialists in domestic extensions, bathrooms, kitchen fit outs and project management with over 30 years experience. Part of the Octane Group of companies. PERFORMANCE DRIVES Driveway and Security specialists serving Warwickshire and the Midlands. We offer high-quality block paving and resin drives. We also specialise in vehicle and home security, offering and fitting a wide range of security posts, bollards, gates and more. Dropped Kerb Specialists at fixed pricing - NRSWA Approved for street works with optional management of council applications. Part of the Octane Group of companies.
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Latest review:
Driveways (Paved & Loose)- 7 May 2026
We were lucky enough that Performance drives had a cancellation and was able to get to our job so quickly. Thankfully the job was done within good time and finished to a high quality which left the homeowner very happy.
R Brooks Carpentry & Building-Bespoke Construction
Rating: 5 out of 5
Extension Builder in Northamptonshire
I am a CSCS registered, level 3 NVQ qualified carpenter, (Advanced carpentry and joinery) with 13 years experience in all types of construction work. Incredibly passionate about my work and always conducting myself in a professional manner. Friendly, trustworthy and will go out of my way to help your project run smooth. Working along side other quality tradesman to help envision, build and achieve your desired finish. All work is finished to a high standard. Kind regards Ryan
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Latest review:
Carpentry- 29 Jan 2021
A very good job to a high standard , as a fellow trades person (sparky) i know how important reputation is . Ryan was very helpful in sorting out my doors and i am very happy with the job done. i would have no problem in using Ryan again for my next carpentry project .
The Building Partnership Ltd
No reviews yet
Extension Builder in Northamptonshire
We are a main contractor and building company that has been trading since 1996 and we undertake domestic, commercial and industrial projects of all sizes. These include extensions, refurbishments, conversions and new builds. The company is run by two co-Directors who have over 75 years of building experience between them.
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ALL ABOUT CONSTRUCTION LTD
Rating: 5 out of 5
Extension Builder in Northamptonshire
My name is James I’m a carpenter joiner by trade but have been in construction for 22 years building extensions , loft conversions renovations etc . All work is quoted by me and carried out by me , or a helping hand on the day
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Latest review:
Joinery & Cabinet Making- 11 Jun 2026
The job went well.

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.

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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.