Extension Builders in Chalfont St Giles

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 3.5 (11 reviews)

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Some of our top rated extension builders in Chalfont St Giles

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Jass
Rating: 5 out of 5
Extension Builder in Chalfont St Giles
We do all kind of staircase with fill finishing, Roofs Structure, Roof Tiles , installing doors , Flooring and other construction work.
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Latest review:
Carpentry- 1 Jul 2026
Jass was quick to respond and gave a good price for fabricating a staircase on site. Jass made sure I was happy before leaving and readjusted one of the steps which was creaking.
James Barnard
Rating: 5 out of 5
Extension Builder in Chalfont St Giles
Jb build and landscape strives to deliver a quality, friendly , cost efficient building experience . With a large portfolio of works carried out and a long list of happy customers , Let Jb build take care of your building needs .
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Latest review:
Extensions- 5 May 2019
We’re delighted with the work Jamie and Charlie have carried out for us. Although only a single story extension, it was complicated work with several steels and unusual roof angles to negotiate. Their workmanship and pride in taking care of the details shone throughout. We decided to stay living in the property whilst the work was carried out and they made sure we had a fully functioning temporary kitchen, with insulated temporary wall shielding us from the elements and keeping us secure. They were fantastic with the kids and we thoroughly enjoyed having them around. I’ve never known trades to be so tidy, making sure our space was totally liveable throughout the project and going above and beyond to try and keep minimal impact to us. We decided to extend the project and asked them to tidy up our garden with a fantastic new double patio, hand made wooden pergola and raised beds, and a new garden fence - all completed to their usual high standard and great advice on what would look good. We’re delighted with how it’s all turned out. I wouldn’t hesitate to recommend them to others and we’ll certainly be using them for any future building projects. Thanks guys!
Cousins Brickwork
Rating: 4.8 out of 5
Extension Builder in Chalfont St Giles
Cousins Brickwork puts quality first. We provide quality brickwork, landscaping and specialist repointing. We take pride in our work and reputation. No job too small or too big, we are happy to cater to all jobs. Fully insured and qualified bricklayers and labourers, many years of experience through out the team. Hope to hear from you soon Cousins Brickwork
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Latest review:
Repointing- 1 Dec 2025
Really wonderful work. Matt was a delight to deal with from start to finish and his work was a very high standard. I would strongly recommend him. We want him to do more work for us.
James Harvey construction
Rating: 5 out of 5
Extension Builder in Chalfont St Giles
I’m a small building contractor able to do a bit of everything my main trade is bricklaying as I have NVQ 1,2,3 in brick work qualifications, I deal with conversions, extensions, basemeants, garden walls, pointing, sheds, paving, pavement, patios, repairs, restoration I have had a good reputation and all good feedback top quality brickwork as standard love too meet you and help you in anything that you require.
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Latest review:
Bricklaying- 3 Apr 2023
James did the job to a high standard and at a good price. He also left everything clean and tidy. I was very pleased with the work.
Marker building contractors LTD
No reviews yet
Extension Builder in Chalfont St Giles
Marker Building Contractors LTD pride ourselves on customer satisfaction. We are a team of specialised tradesman with 15+ years of experience. We cover all aspects of building which include refurbishments, extensions and loft conversions. All jobs are completed to the highest standard by our team of skilled craftsman. We look forward to hearing from you.
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St albans plastering ltd
Rating: 5 out of 5
Extension Builder in Chalfont St Giles
Hello, I have over 10 years experience in building and plastering. I undertake all types of plastering, rendering and refurbishment jobs. In the last year I have done lofts conversions, garage conversions, sky lights, media walls and much more. I have a good team who are reliable and professional. Please shortlist me so that I can provide you with a free quote. I am also happy to provide you with photos of my work.
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Latest review:
Conversions - General- 13 Dec 2018
Tony was superb. Very professional in quoting for the job, discussing different options and keeping us informed all the way through of progress and costs. The quality of the work is very high and the job was done in really good time. Highly recommended.
GP Construction Services Ltd
Rating: 5 out of 5
Extension Builder in Chalfont St Giles
New build, extensions, loft conversion, glazing, roofing, electrical and plumbing
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Latest review:
We recently bought flat to let and decided to do completely refurbish. We invited few quotations including Gurwinder. We shortlisted top 3 quotation and invited him for discussion. During the meeting he was very professional and full of ideas. So we decided to honour him. Work started as agree on time, during the Job we liked his ownership of the work and advising us on the very step of the decision. Although it would have been better if his communications were more punctual but it neither affect us nor delayed any work. Even after completion he has been very helpful if any issue arises ( nothing major).
Jlbplus
Rating: 5 out of 5
Extension Builder in Chalfont St Giles
Exterior and interior painting Tiling and flooring, building, extension building, More than 25 years of experience Free estimate by visiting Colour samples Quality of work and friendly prices Liability insurance Contract and invoice Huge gallery of our work and videos
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Latest review:
Painting & Decorating- 7 Aug 2026
Very impressed with Jan and Lucia. Excellent work. Punctual, professional reasonably priced and friendly. Highly recommended and the work has transformed our living room.
Waris Group Ltd
Rating: 5 out of 5
Extension Builder in Chalfont St Giles
WARIS GROUP LTD NEW BUILD - LOFT CONVERSION, EXTENSION, PATIO AND DRIVEWAYS ALL ROOFING WORKS FLOOR TILES WORK DOOR & WINDOWS GARDEN WORK KITCHEN BATHROOMS, ELECTRICAL WORK PLUMBING WORK BOILER & HEATING PLASTER WORK K RENDER INSTALLATION SKIMMING WORK RENOVATION, DECORATION, FACIA AND GUTTERING ALL BUILDING WORKS UNDERTAKEN FREE ESTIMATE Why chosse us The 15 years of experience and a commitment to excellence, we offer top-quality craftsmanship and superior customer service. From minor fixes to major renovations , trust us to deliver reliable solutions tailored to your needs. WE HAVE COMPLETED A LOT OF PROJECTS
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Latest review:
We hired waris group ltd for a complete rear house extension and kitchen refit. From start to finish, their communication was fantastic. They arrived on time, kept the site clean every day, and finished the project right on schedule and within budget. Highly recommended
HR RENOVATIONS
Rating: 5 out of 5
Extension Builder in Chalfont St Giles
HR Renovations cover all aspects of building renovations.
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Latest review:
Painting & Decorating- 2 Jul 2025
Would highly recommend HR Renovations. A massive thank you to Ben and his team. They did a fantastic job of renovating my house and I would definitely be using them again! I would highly Recommend HR Renovations.
ALFA QUALITY CONSTRUCTION LTD
Rating: 5 out of 5
Extension Builder in Chalfont St Giles
WELCOME TO ALFA QUALITY CONSTRUCTION LTD Expert Builders You Can Trust We are a team of experienced construction professionals offering top-notch services tailored to your needs. From small refurbishments to large projects, we deliver quality and reliability. Our expertise includes extensions, property maintenance, plumbing, electrical services, sustainable construction, wall tie replacements, and general building. We specialize in warehouse racking, mastic sealant, garage conversions, equestrian stables, concrete garages, agricultural buildings, cladding, core drilling, demolition, and foundations. Whether it’s garden studios, loft conversions, or fire and flood renovations, we bring unmatched craftsmanship. From concept to completion, we ensure durability and client satisfaction. Let us bring your vision to life with professionalism and sustainable practices.
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Latest review:
I thank Alfa Company for the work they did for me. Excellent service, on time and accurate work from the management and employees. I recommend them.
Heritage Masonry Ltd
Rating: 5 out of 5
Extension Builder in Chalfont St Giles
We are a newly founded masonry company with over 10 years experience operating both on commercial and private building sites , we often work with the NHBC standards and provide a top tier standard of work . If you are looking for a builder in regards to a one off build , an extension , a garden wall or anything that involves brickwork , blockwork or stonework and you are after someone reliable , punctual and tidy look no further. Fully insured . Thanks for taking your time reading into our profile. Regards.
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Latest review:
Bricklaying- 28 Nov 2025
Fast response, honest and professional quote. Excellent job!! Have my best recommendation to everyone that needs this kind of job.
DKSC Building Services Ltd
Rating: 4.9 out of 5
Extension Builder in Chalfont St Giles
deals with various types of work. but mainly painting and decorating. I have 10 years of experience. performs work quickly and accurately.
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Latest review:
Bathroom Fitting- 16 Jun 2026
Daniel was responsive and patient with changing plans
Sukhpreet Singh
Rating: 5 out of 5
Extension Builder in Chalfont St Giles
Follow blueprints and building plans to meet the needs of clients. Install structures and fixtures, such as windows and molding. Measure, cut, and shape wood, plastic, and other materials. Construct and install building frameworks, including walls, floors, and doorframes. We do all type of construction work. When it comes to electrical help, our expertise shines through. As experienced professionals in the field, we offer comprehensive services to meet all your electrical needs. From troubleshooting and repairs to installations and upgrades, we've got you covered. Whether it's fixing faulty wiring, installing new outlets, or upgrading your electrical panel, we handle every task with precision and care. Safety is our top priority, and we adhere to all industry standards and regulations. As experts in floor and tiling work, we bring a wealth of experience and skill to every project. From consultation to completion, we excel in delivering high-quality results that transform spaces. With meticulous attention to detail, we ensure precise measurements and flawless installation, whether it's hardwood, tile, or laminate flooring. Our expertise extends to surface preparation, including leveling and waterproofing, to ensure a durable and long-lasting finish. As professional indoor painters, we're skilled artisans with years of experience. From surface preparation to flawless paint application, we excel in every aspect of our craft. Our expertise extends beyond technique—we're problem solvers, ensuring durability and quality. Equipped with the best tools and safety gear, we deliver exceptional results while prioritizing our team's well-being. From consultations to final inspections, our dedication to client satisfaction shines through.
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Latest review:
Carpentry- 5 Aug 2024
Good job .. polite, good work, good lads
SMBuilding Company Limited
Rating: 5 out of 5
Extension Builder in Chalfont St Giles
20+years experience in construction.Working on all types of jobs;large,small and everything in between.Seasoned in extensions,brickwork,renovations,chimney removal,structural work and development,we ensure an exceptional finish. Competitive rates,we have natural drive to get jobs done. These qualities allow us to set out budgets,and time frames,allowing our clients peace of mind. See our about section,and soon you could be relaxing in the knowledge that your job will be done on time and budget.
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Latest review:
Bricklaying- 4 May 2016
Sean was polite, friendly, efficient, clean, tidy and his work was simply the best, I cannot praise Sean's work highly enough, if you want a great tradesman you can trust and someone will do exactly the job you want and more then hire Sean now. Sean is a rare find mark my words HIRE HIM .....
Harrow Home Builders LTD
No reviews yet
Extension Builder in Chalfont St Giles
Harrow Home Builders has been in the construction industry for many years. We are proud of the quality and satisfaction that we provide to our customers. We are able to achieve this at every single project and that is all thanks to the professional team that make this company so unique and successful. Here at Harrow Home Builders, we normally undertake various different works but most commonly we undertake complete new house builds, loft conversions and property extensions.
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3.5

Top rated Extension Builders

Our Extension Builders in Chalfont St Giles, are rated 3.5 out of 5 based on 11 reviews from customers like you.

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What types of services are offered by local extension builders in Chalfont St Giles?

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 Chalfont St Giles 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 Chalfont St Giles who are available and interested can respond to your post.

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

What are the hourly rates of extension builders in Chalfont St Giles?

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

Find extension builders in Chalfont St Giles with MyBuilder

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

Step 2: Compare different extension builders in Chalfont St Giles

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

Step 3: Hire Chalfont St Giles extension builders with confidence

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

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

What to ask a Chalfont St Giles extension builder before hiring?

Before hiring an extension builder in Chalfont St Giles or extension building company in Chalfont St Giles, 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 Chalfont St Giles?

An extension builder in Chalfont St Giles 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 Chalfont St Giles 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 Chalfont St Giles?

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 Chalfont St Giles 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 Chalfont St Giles 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 Chalfont St Giles

Can an extension builder in Chalfont St Giles help with planning permission?

Yes, many extension builders in Chalfont St Giles 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 Chalfont St Giles handle everything from design to construction?

Many Chalfont St Giles 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 Chalfont St Giles help with materials and finishes?

Yes, most extension builders in Chalfont St Giles 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.