Extension Builders in Eastleigh

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.4 (5 reviews)

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

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 Eastleigh

518 Results

Sort by:

The Solution for Building and Refurbishment
Rating: 5 out of 5
Extension Builder in Eastleigh
The Solution is a friendly professional company who loves what we do. We take great pride in our work focusing on providing a finished product that is of the highest quality and beauty. We believe it is essential to ensure our customers satisfaction from job start to finish.
Get in touch
Latest review:
Plastering- 24 May 2010
100% positive feedback - no doubt. Lino worked very hard with excellent quality. There was a very short notice for this job, but still was able to give me a very fair price. Also I received a few valuable advises for my future projects for 'free'. I definitely recommned Lino's services for anyone who needs it. Thank you.
D Baxter brickwork
Rating: 5 out of 5
Extension Builder in Eastleigh
Hi my names Dean I'm a fully qualified Bricklayer. I've been working in the trade for 10 years now I always aim to insure the best quality and price possible.
Get in touch
Latest review:
Did a great job, will use again.
3 Futures ltd
Rating: 5 out of 5
Extension Builder in Eastleigh
We are a full turn key Construction company that offers Mechanical, Electrical & all Construction services, from a small repair to a major refurbishment or new build project. We pride ourselves in our ability to take an idea through to a completed reality, all this is achieved through our knowledgeable and expert team. We also hold accreditations such as CHAS and NICEIC
Get in touch
Latest review:
Conversions - General- 22 May 2022
Terry and his team were great, work completed within time scale and accommodated changes we asked for. The finished work is exactly what we wanted. He kept us fully informed throughout and we’ll use him again when we’re ready for our next project. Would recommend.
S Clements Building Services
Rating: 5 out of 5
Extension Builder in Eastleigh
I've been in the building trade for over 18 years I have an NVQ in bricklaying also many years experience in plastering. I undertake work involving groundworks i.e. Footings, drainage, concreting. Brick/blockwork Block and beam Plasterboard and plastering Rendering ,Patios and landscaping
Get in touch
Latest review:
Conversions - General- 17 Apr 2018
Scott and his team were punctual, polite, efficient and very experienced. I cannot praise them enough. The work was carried out to a high standard and well within scheduled time. They left the place very clean and tidy end of the day and when the build finished. I would definitely use them again and would highly recommend them.
Gibs Construction
Rating: 5 out of 5
Extension Builder in Eastleigh
At Gibs Construction we take on all areas of building work big or small. With over 40 years experience in the construction industry we make sure the job is done right!
Get in touch
Latest review:
Used Ryan for the complete rip out and refurb of my property. Would recommend to anyone looking for this type of work, easy communication and updates, good pricing & amazing quality! Couldn’t be happier
RB Construction and Building LTD
Rating: 5 out of 5
Extension Builder in Eastleigh
We are a reliable and trustworthy company. We carry out small and large scale domestic and commercial projects, covering all aspects of construction.
Get in touch
Latest review:
RB Construction have done several projects at our premises. We have been more than happy with the professionalism, quality, value for money, programme and the understanding of their clients wants and needs. All their employees and subcontractors are courteous, friendly and respectful of the environment in which they work. We are very happy to have RB Construction as one of our trusted supply chain and would recommend them for any project.
GB Home & Garden services
Rating: 5 out of 5
Extension Builder in Eastleigh
I have been in construction and property maintenance for 20 years working for myself the last 15 here at GB HOME AND GARDEN SERVICES we strive do a professional job we take on all kinds of work from bricklaying painting and decorating and garden services i.e. patios lawn care garden walls paths we have taking on projects from fitting a skirting board to building garages and painting and decorating projects there is no job too small because some of the smallest jobs are the most important thanks
Get in touch
Latest review:
Bricklaying- 3 Feb 2019
Greg turned up when he said he would and charged a very reasonable amount for a couple of small bricking up jobs, which we are very satisfied with. He was very pleasant to have around, and is easy to communicate with. Would recommend.
Green earth builders ltd
Rating: 5 out of 5
Extension Builder in Eastleigh
New to mybuilder Green Earth Building & Roofing Contractors Transforming Homes with Sustainability and Style Looking to expand, House flip, Structural changes, upgrade, or completely remodel your home? Trust Green Earth Building & Roofing Contractors – your local experts in eco-friendly construction and renovation. We specialise in: Home Extensions & Loft Conversions – House flips, structural changes, Add space and value with seamless, energy-efficient designs. Home Remodelling – Revitalise your living space with stylish, functional transformations. New Roof Installations & Repairs – Durable, sustainable roofing solutions tailored to your home. Bathrooms & Kitchens – Modern, eco-conscious designs that blend comfort with innovation. With a commitment to quality craftsmanship, sustainable materials, and customer satisfaction, we bring your vision to life while caring for the planet. Get your free quote today and build better with Green Earth.
Get in touch
Latest review:
Very professional throughout the project, clean and tidy workmen excellent workmanship
JCM Installations Limited
Rating: 4.4 out of 5
Extension Builder in Eastleigh
JCM Installations Limited based in Southampton is a family-run local building company for 10 years+. We are helpful, considerate, clean, and tidy, and always strive to cause minimal disruption whilst producing a professional finish to your job. We specialise in: Building of single/double-storey extensions (groundworks, footings & drainage, roof installation, steelwork & removal of walls, double glazing, plastered finish with plumbing), Loft conversions, Kitchens, Fencing, Patios and more.
Get in touch
Latest review:
Extensions- 13 Feb 2023
Porch looks nice but that’s all. First a positive - the guys that work for Justin were great and worked hard when they were here, but I never knew when they were coming and the project took 6 months which was far too long. Justin was always busy doing other things and didn’t turn up when he said he would so I had to keep chasing. The price also increased a lot but he blamed covid which was nonsense as he started in January 2022. Since the porch was finished barely 6 months ago, I’ve had water seeping through the wall so now the plaster is cracked and water marked and all Justin offered to do was put some silicone between the fascia/soffit and wall, and this took him a week to come and do. I then had an issue where water was leaking above the internal door - it turns out the condenser pipe and pressure relief from the boiler are above that door, but when the porch was built these were left in place and covered up with the plasterboard. I contacted Justin but all I received was rudeness, aggression, lies and blaming me for the problem and then he hung up on me. He offered to fix the issue but told me he’d charge me for it as it was my fault for telling him the pipes were redundant which is completely untrue. The design of the porch is good and it looks much better than the old one but I wouldn’t use Justin again
Southern construction and maintenance contractor
Rating: 5 out of 5
Extension Builder in Eastleigh
Local tradesmen been in construction 17 years highly skilled and experienced. Extremely motivated to finish projects and please customers with high quality. Private or commercial Big and small jobs wanted
Get in touch
Latest review:
Fascias & Soffits- 10 Mar 2025
Scmc very friendly team. Worked around my schedule ,punctual, clean,cleard all the mess, completed the job in time. Very happy with the job. Highly recommend them. I will always use them.
Mofokeng Dodzo and Partners Ltd
Rating: 5 out of 5
Extension Builder in Eastleigh
MD and Partners is a limited company that specialists in Civil engineering works and property developers.We are capable of perform jobs of different magnitudes to the satisfaction of our clients
Get in touch
Latest review:
Willard installed the paving slabs and cut bushes in our garden. We were very much impressed with his work ethic and the short-time he took to complete the job.
Sw brickwork
Rating: 5 out of 5
Extension Builder in Eastleigh
I have 25 years experience of bricklaying ,I reliable punctual and clean and tidy ,I can build what ever is required walls,steps,extension no job to big or to small,I also do hard landscaping, ponds,patios etc
Get in touch
Latest review:
Bricklaying- 15 Nov 2025
Great job from start to finish Kept us updated of the progress and very happy with the finished job
BBR Solutions
Rating: 5 out of 5
Extension Builder in Eastleigh
Hi im jason owner of BBR solutions, I have over 10 years of experience in all aspects of groundworks, from patios to concreting, paving, to footings for new extensions, drainage & new pipeline. I also have over 10 years of experience in all aspects of tiling I’m fully qualified in wall and floor indoor & outdoor. We have grown our ability to do other jobs in different trades I take pride in my work provide good quality Complete jobs to a high standard and satisfying customers is paramount.
Get in touch
Latest review:
Groundwork & Foundations- 8 Apr 2026
Good competitive quote. Short lead in time before doing the work. The concrete base was completed quickly and efficiently.
Szymon Martul
Rating: 5 out of 5
Extension Builder in Eastleigh
Always looking for perfection in work.
Get in touch
Latest review:
Bathroom Fitting- 6 Sep 2024
Szymon remodeled and fitted a new bathroom, the attention to detail he and Emil showed was next level. Easily the best tradespeople we’ve ever used, their skills, knowledge and perfectionism was incredibly impressive. They were also just really lovely and kind people to have in our home. Thanks so much guys!
Larks design & build
Rating: 5 out of 5
Extension Builder in Eastleigh
Larks Design and Build is a trusted team of skilled professionals with years of experience in the construction industry,offering construction services. We deliver stunning, high-quality finishes tailored to your vision, with a commitment to completing projects on time and leaving your space clean and tidy. Our friendly approach and clear communication ensure a seamless experience. Start with a complimentary phone consultation to discuss your project. We’re excited to transform your space and look forward to working with you!
Get in touch
Latest review:
Bathroom Fitting- 1 Jun 2026
Arrived approximately 10am as arranged. Viewed the job then went back to van to collect tools. commenced work and by 12 noon the work was complete.all rubbish, old fittings etc were removed and the site was left clean neat and tidy. I can recommend Larks most highly.
Merit Building & Maintenance
Rating: 5 out of 5
Extension Builder in Eastleigh
Hi there, We carry out All aspects of general building work Extensions, refurbs, structural alterations, out buildings , fascia sofits and guttering ,carpentry , brickwork, bathrooms and kitchens , driveways, patios and much more . Fully insured I work with various other trades to carry out a complete professional quality of work. I’ve Worked in building trade for over 15 years and we are very hard working And reliable. We don’t find excuses only solutions Thanks for the interest
Get in touch
Latest review:
David worked on my property for just over 6 months. Structurally I had a supporting wall removed and ground floor extension. David competed a complete refurbishment on my house which is a 3 bedroom Victorian property. He worked with additional contractors and project managed the entire thing from start to finish. He was a pleasure to deal with and I felt he gave my property the same care and attention to detail he would have given his own home. I happily recommend David to my friends and family.

4.4

Top rated Extension Builders

Our Extension Builders in Eastleigh, are rated 4.4 out of 5 based on 5 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 Eastleigh?

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

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

What are the hourly rates of extension builders in Eastleigh?

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

Find extension builders in Eastleigh with MyBuilder

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

Step 2: Compare different extension builders in Eastleigh

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

Step 3: Hire Eastleigh extension builders with confidence

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

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

What to ask a Eastleigh extension builder before hiring?

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

An extension builder in Eastleigh 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 Eastleigh 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 Eastleigh?

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 Eastleigh 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 Eastleigh 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 Eastleigh

Can an extension builder in Eastleigh help with planning permission?

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

Many Eastleigh 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 Eastleigh help with materials and finishes?

Yes, most extension builders in Eastleigh 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.