Extension Builders in Guildford

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.3 (19 reviews)

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Some of our top rated extension builders in Guildford

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SAM DESIGN & BUILD LTD
Rating: 4.4 out of 5
Extension Builder in Guildford
Having a wide range of experiences in designing and constructing extensions, loft conversions, alterations and new buildings with planning, structural drawings and calculation, we provide full range of service from planning and design to construction. Electrical, gas safe, plumbing and heating are also part of our wide range of services. Load bearing wall removal, chimney breasts removal, refurbishing kitchen and bathroom were also one of the most accomplished projects in last year. Look forward to hear from you.
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Latest review:
Extensions- 3 Oct 2025
Job was to convert WC in outbuilding into a full bathroom, do walls and ceiling in outbuilding to convert into an office space. Price was agreed with things planned, still with some issues towards later part of job, It worked out in the end. Overall I am giving 3-4 stars as quality of work is good. Just need to have things written down with him, and a thorough discussion on plan before commencing work and agree on payment plan. suggested to keep 20% to be paid at completion.
R&R builders
No reviews yet
Extension Builder in Guildford
R&R Builders is a leader in providing value-added construction services to our customers by creating a successful partnership with them throughout the construction process. Our pledge is to establish lasting relationships with our customers.
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KF Carpentry and Construction Ltd
New on MyBuilder
Extension Builder in Guildford
Family-Run Carpentry & Construction Specialists in Farnham & Surrey We are a trusted, family-run carpentry and construction company based in Farnham, Surrey, providing high-quality workmanship with a personal, reliable service. From bespoke carpentry and renovations to extensions, Kitchens and general building work, we take pride in delivering every project to a high standard. Whether it’s a small home improvement or a complete renovation, we work closely with our customers from start to finish, ensuring a professional finish and attention to detail every time. Quality workmanship • Reliable service • Local & family run
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Jass
Rating: 5 out of 5
Extension Builder in Guildford
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.
DC Design & Build
No reviews yet
Extension Builder in Guildford
I spent 15 years locally as a general builder having first worked to achieve my advanced craft C&G carpentry training. I then worked in central London for ten years building very impressive homes for very wealthy people. I am now bringing all of my experience back to my roots so my clients can enjoy the benefit of my broad experiences within the building industry without the expensive costs.
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GP Construction Services Ltd
Rating: 5 out of 5
Extension Builder in Guildford
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).
ROCBUILD LTD
No reviews yet
Extension Builder in Guildford
RocBuild is a professional building company where customer satisfaction is our top priority. We predominately carry out extensions but offer all the associated trades separately too Our clients can rest assured all works are carried out to the highest standards complying with building regs
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j ward joint sealing specialists ltd
Rating: 5 out of 5
Extension Builder in Guildford
Est 2010, we have grown our business and expanded . We have worked for some of the largest developers in the country on properties up to £70 million. 2015 was the turning point for us going to a Ltd company ahead of target. We expanded our business to bespoke design and build and specialize in refurbishment properties and major extensions with a large client base across the east, south, and west counties, including work in the Cotswolds. We have now expanded in PROFESSIONAL SNAGGING. We also specialize in feature wall paneling. All of our tradesmen are certified in their fields. References and photographic evidence can be provided. We take the strain from any job and provide all trades, Project management and Produce quality work to the highest of standards.
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Latest review:
Extensions- 8 Oct 2025
Jason and his team have just completed our wraparound extension, and the result has exceeded all expectations. Their workmanship, accuracy, and attention to detail are outstanding, and the whole process was smooth and stress-free. They stuck to timings, kept the budget in mind, and made everything feel effortless. Partway through the build, Jason had to undergo an operation and was signed off for five weeks. Remarkably, nothing was delayed — his team carried the project seamlessly, and with Jason still on site when he was able to be, everything ran perfectly. It’s a real credit to how capable they all are and the consistently high standards they work to. The only negative thing I can say is that we were sad to see them leave – they’ve been such a positive part of our daily lives over the past eight weeks. The finish is exceptional and we’re absolutely over the moon. We couldn’t recommend Jason and his team highly enough.
J West Contracts
New on MyBuilder
Extension Builder in Guildford
I am a general builder specialising in bespoke carpentry. I see jobs through start to finish e.g demolition all the way to kitchen fittings.
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BlueCrownBuilders
Rating: 4.8 out of 5
Extension Builder in Guildford
Hi My name is Satinder Singh @BLUECROWN BUILDERS LTD I am a specialist in variational constructional activities : Groundworks specialist (Drainage, Utilities, Concrete finishing, Kerbs, Edges Concrete slabs, Foundations) In house/ paint and decorating and house renovations Gardens Drives/patios Hedge cutting/trimming Clearances
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Latest review:
Garden Maintenance- 3 Jun 2025
Great job done for an overgrown garden, very clean work, took all the gardening waste with them and cleaned the patio and the lawn. Very polite man and never needed to explain the job after the first convo. Definitely recommend him, very humble and honest guy!
Angle Construction
Rating: 4.7 out of 5
Extension Builder in Guildford
We have been in the construction business for over 15 years doing all sorts of works, from minor works to full home constructions. No job to small no job to big. We work in and around London
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Latest review:
Windows & Doors (uPVC & Metal)- 28 Jan 2026
Very unhappy with how things went with Angle Construction overall. Poor comms during the transaction was the first red flag - no communication for 2 days the moment money was sent, however afterwards received an apologetic call - parts ordered and arrived in due course. Andrei turned up, and got to work on removing the old gate, but then started shaving down the post without saying anything -we were told after that the posts were not level. Eventually he said the door would need to be cut, which we agreed to. The door and posts were both cut to fit, but massive gap left at the bottom, and only half of the door fittings and no handles were installed! In addition, where the door was cut and the wood shaved made, a lot of mess was left all over the garden furniture and patio floor. Shocked at the lack of care and professionalism. He was clearly agitated and in a rush to leave. We have a working back door, but it looks like a real botched job. Not happy, and I would not recommend.
First Choice KB Constructions Ltd
Rating: 5 out of 5
Extension Builder in Guildford
At First Choice KB Construction Ltd, we pride ourselves on being your go-to solution for home improvements projects. With a wide array of expertise in house extensions, refurbishments, loft conversions, and the renovation of bathroom and kitchens, we’re fully equipped to tackle diverse projects. Our services span across various aspects including brickwork, plumbing, electrical, and more, ensuring a comprehensive approach to every job. Our team boast over a decade of experience in the field, ensuring that we deliver results that stands the test if time. At First Choice, our goal is clear: to provide top-notch quality work that lasts, while adhering to agreed-upon timelines. We prioritize flexibility to accommodate our customers’ unique needs and preference. No project is too small for us. We're dedicated to delivering excellent service, ensuring that our clients' needs and requirements are not just met, but exceeded. Customer satisfaction is our ultimate priority.
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Latest review:
Extensions- 30 Jun 2024
Absolutely brilliant from start to finish. Customer service is A+ Very happy with the fitted wardrobes and work done.
Darktolight
Rating: 4.5 out of 5
Extension Builder in Guildford
WELCOME to DARK 2 LIGHT CONSTRUCTION LTD. We are team of builders and electricians and all the trades . Our website is available to get more information ! Our team is made up of qualified, trusted and experienced workers . No job is too small or too big, we offer a big range of services . Call now to get a free quote !
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Latest review:
Extensions- 14 Jun 2023
⭐️⭐️⭐️⭐️Excellent Builders.👍👍⭐️⭐️⭐️ I used different types of builders for the past 10yrs for various type of job. But I would tell DARKTOLIGHT are THE BEST of all. They are skilful, honest, punctual, friendly, economical, and very professional. They always consider your financial situation and help your building/repair needs accordingly. They complete the job with the fullest satisfaction on time. I have already booked for more of my other jobs. Highly recommend.10/10.
Jhand construction ltd
Rating: 4.5 out of 5
Extension Builder in Guildford
Hi i have 14 years experience in construction industry we do loft conversion, extensions please feel free contact us
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Latest review:
Plastering- 21 Aug 2025
Best construction company, amazing staff. Thank you so much for the service.
Precision Builds
No reviews yet
Extension Builder in Guildford
There are 86400 seconds in a day, each one as precious as the last because no two are ever the same and once there gone there gone. So my motto is do or do not there is no try. Hi I'm Shaun, a General Construction and Property Maintenance Contractor with 15 of years Experience in multiple skillsets spanning across several industries. I Offer Free Quotations and Full Insurance and Liabilities coverage for Customer Piece of Mind. My Fields of expertise include but are not limited to.... Driveways Garden Rooms Extensions Patios Fencing GRP Masonry Carpentry Painting and Decorating Audio Visual HVAC "Heating Ventilation & Air Conditioning" Demolition
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Home Renovations Ltd
Rating: 5 out of 5
Extension Builder in Guildford
We're a building company specializing in house extensions, loft conversions and refurbishments. Our clients come from New Malden, where we're based, but also surrounding areas. The vast industry experience enables us to provide valuable advice, professional services and individual approach, benefiting our customers. As we understand trust and credibility are crucial when undertaking such projects, we arrange viewings and provide customers with references and photos of our most recent projects.
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Latest review:
Extensions- 24 Jun 2017
We had a large piece of work done by Johan and his team. It was a 4m single storey rear extension with new kitchen installation, converting the old kitchen into a downstairs bathroom and utility room, plus other bits and bobs like new boiler, rear patio. We got quotes from a few builders, Home Renovations weren't the cheapest, they were actually towards the higher end. But we went and saw their previous work and spoke to some of their other clients. The work was done to a high quality and the clients seemed to be happy so we decided to go with them. Johan's team are very hard working, professional and polite. Pawel and his team of builders, bricklayers, plumbers, electricians, etc. would turn up before 8am and finish at 6pm working solidly throughout the day. There is Magda as the project manager who keeps you in the loop, and answers any of your questions (which we had many). There is Michaela on the finance side who keeps you up to date with the budget. Our budget went over by 5% with "variations" (extra work or materials) but it was always communicated why and the work wasn't done without our approval. Pawel would give his recommendations but the final word would always be ours. But these things can add up. Overall we were very happy with the build, it was done to a very high standard. They also finished it before time. They said it would take 12 weeks in fact they finished it in 10 weeks which was amazing as you would normally expect these things to go over.

4.3

Top rated Extension Builders

Our Extension Builders in Guildford, are rated 4.3 out of 5 based on 19 reviews from customers like you.

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

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

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

What are the hourly rates of extension builders in Guildford?

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

Find extension builders in Guildford with MyBuilder

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

Step 2: Compare different extension builders in Guildford

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

Step 3: Hire Guildford extension builders with confidence

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

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

What to ask a Guildford extension builder before hiring?

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

An extension builder in Guildford 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 Guildford 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 Guildford?

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 Guildford 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 Guildford 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 Guildford

Can an extension builder in Guildford help with planning permission?

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

Many Guildford 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 Guildford help with materials and finishes?

Yes, most extension builders in Guildford 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.