Extension Builders in Northampton

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

Easily find verified Northampton Extension Builders. Just post your job to get quotes from MyBuilder's Extension Builders in Northampton.

Select a service

How it works

Post your job for free

Tell us about your job, and we’ll alert suitable tradespeople in your area. It’s simple and free.

Tradespeople respond

Once your job is posted, you’ll get responses from interested tradespeople through the website.

Review profiles and choose

Browse profiles, work history, and feedback, then choose who you wish to share your details with.

Some of our top rated extension builders in Northampton

431 Results

Sort by:

Proper Builders
Rating: 5 out of 5
Extension Builder in Northampton
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.
Get in touch
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!
Lighthouse Crew Limited
Rating: 5 out of 5
Extension Builder in Northampton
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.
Get in touch
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.
Shaun blythe
Rating: 5 out of 5
Extension Builder in Northampton
Osmium property services is a multi-disciplined team of professional tradesmen. We have successfully completed projects that have truly transformed our customer’s homes into spaces that they can now enjoy living in. We provide sufficient knowledge to customers ensuring you know exactly what is needed for a job, as well as suggestions on improvements and other respectable tradesmen needed for the jobs. We offer free quotes with 100% A* work.
Get in touch
Latest review:
Plastering- 3 Sep 2021
Excellent plastering and painting job done by Shaun . My living room looks all new again . He took out the fireplace all nicely and did a great plastering job . All this done at very reasonable price . He went a extra mile to install my TV as well . Based on plastering work , he also mentioned he could do the box work for garage and he did excellent job there as well . Will definitely recommend Shaun for interior works and will definitely call for any future works .
Darren Coote Builders
Rating: 5 out of 5
Extension Builder in Northampton
I have worked in construction for 30 years. I am a reliable, conscientious, trustworthy and happy person. I have City & Guilds in Brickwork, of which I did my apprenticeship. I specialise in driveways, patios, extensions, brickwork, new builds and much more. I only do 1 job at a time from start to finish. Thank you.
Get in touch
Latest review:
Extensions- 24 Apr 2019
Darren was on site every day without fail. His work was 1st class. He knows his job and is very experienced. He was able to give us a start and finish date and he kept to those dates. He cleared and cleaned the site every day. He was an absolute joy to be around and went the extra mile to ensure we were pleased with his work. I would not hesitate to recommend him. His brickwork is a pleasure to look at and both the extensions he built - a rear extension with bi-fold doors, and a side extension (the garage) both look as if they've always been there. Craftsmanship at its best. He knows the building regs required, his standards are 100% good. Darren's prices are extremely competitive, he's no rip-off merchant.
abode conversions ltd
No reviews yet
Extension Builder in Northampton
At Abode Conversions we strive to make your home the best version of itself. From renovating your kitchen to extending your property we plan, build and project manage at every step to remove the stress from you. With over 30 years experience in the building trade our dedicated team work with our clients to renovate, extend or simply update your home. Our exceptional workmanship and expertise ensures that projects such as extensions, bathrooms refurbishments, kitchen refurbishments, conversions and HMOs are completed to the highest standard.
Get in touch
MASWAY CONSTRUCTION LIMITED
Rating: 5 out of 5
Extension Builder in Northampton
Masway Construction provide and undertake all aspects of building and carpentry works, priding ourselves on our fast growing reputation. With this in mind our services are heavily built upon not only giving an outstanding finished product but giving exceptional levels of customer service. With a wealth of experience through out we are able to deliver a quality and unique service based on our understanding of customer needs. As specialists we can help & advise with all designs and ideas.
Get in touch
Latest review:
Joinery & Cabinet Making- 20 Nov 2017
Alex was very quick to provide an appointment to look at job and cost. He arranged for workmen to start work in the same week. The job was completed in a day by Chris who was very polite and helpful throughout. I would definitely hire again. Thank you M&S Construction
R Brooks Carpentry & Building-Bespoke Construction
Rating: 5 out of 5
Extension Builder in Northampton
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
Get in touch
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 Northampton
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.
Get in touch
Oliver Creese Brickwork
Rating: 5 out of 5
Extension Builder in Northampton
We undertake all aspects of brick and blockwork, from garden walls to full 2 storey extensions and new builds including conservation projects, conversions and rebuilds.
Get in touch
Latest review:
Extensions- 2 Mar 2021
Oliver has just completed building our porch ... great job don’t bother looking for anyone to do your brickwork .
DD Diamond Developments LTD
Rating: 5 out of 5
Extension Builder in Northampton
Diamond Developments, we strive to create houses into homes. From painting and decorating to extensions, we consider no job to small. With our customer centric approach, our team are consistently focused on making clients smile. Our team has a combined experience of 30+ years within different trades, so we always have a specialist for the task at hand. We have completed high quality work from Leicester to London.
Get in touch
Latest review:
Bathroom Fitting- 14 Apr 2023
Gurpreet and his team are professional. The bathroom has an excellent finish. The job was complete in a timely fashion. I will definitely use them again going forward. Thank you for your brilliant work.
Dipun Gandhi Designers Limited
Rating: 5 out of 5
Extension Builder in Northampton
Whether its a refurbishment, renovation or a new development of your home or business, I can deliver all the processes of a project, from initial designs to planning approvals, regulations, and the building work itself. I care about what I do, so only your best interests are in mind when seeking the most rewarding results. Clear and concise drawings, 3D models, realistic impressions, and a personal touch are all part of ensuring the best Value for your project.
Get in touch
Latest review:
Architecture- 2 Apr 2018
Very helpful in formulating plans and submitting all the paperwork, really clear information as we went through the process.
WRP LTD
Rating: 4 out of 5
Extension Builder in Northampton
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.
Get in touch
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.
ALL ABOUT CONSTRUCTION LTD
Rating: 5 out of 5
Extension Builder in Northampton
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
Get in touch
Latest review:
Carpentry- 13 Aug 2026
James did a great job installing our new guardrail and under stair storage. He was also kind enough to help us with panelling. Highly recommend.
Kacper
No reviews yet
Extension Builder in Northampton
Taking every job seriously. Quality work and always meeting deadlines.
Get in touch
Jwm construction Ltd
No reviews yet
Extension Builder in Northampton
Jwm construction Ltd Will provide you with quality work at affordable prices. We believe in going the extra mile for all our customers old and new.
Get in touch
Infinity joinery ltd
No reviews yet
Extension Builder in Northampton
I'm a carpenter with 10 years experience inall aspects of carpentry, specialising in fitted wardrobes and kitchens
Get in touch

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.

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 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.