Extension Builders in Letchworth Garden City

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

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

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 Letchworth Garden City

876 Results

Sort by:

BURTON SMITH LIMITED
Rating: 4.7 out of 5
Extension Builder in Letchworth Garden City
The Burton Smith Group is team of exceptionally skilled engineers dedicated to delivering the utmost quality and standard of work. We prioritise thorough consultations at your residence to discuss your project. Throughout the duration, you will have a designated point of contact available at all times, streamlining communication. With all trades consolidated under one roof. We are fully insured across every trade, providing peace of mind within your home. Contact us today.
Get in touch
Latest review:
Plumbing- 7 Feb 2025
Great company. Very happy with the work they carried out. They even carried out some extra work for us. Will definitely use them again, should the need arise.
Innovate carpentry
No reviews yet
Extension Builder in Letchworth Garden City
We specialise in all home renovations covering Hertfordshire and South Bedfordshire. We aim to work with each client to achieve the outcome and look that they require making each job personal to you.
Get in touch
L & B masonry
No reviews yet
Extension Builder in Letchworth Garden City
L & B masonry team have over ten years of hands-on experience in the bricklaying trade, we bring skill, reliability, and real pride to every project. We combine traditional workmanship with a modern, professional approach. From small repairs to full builds, attention to detail and a high-quality finish are always our top priorities. I believe the end result is everything, and we work closely with every client to ensure the job is completed to the highest standard, on time and built to last.
Get in touch
KC & TROY CONSTRUCTION LTD
No reviews yet
Extension Builder in Letchworth Garden City
Hi my name is Patryk, I have started this company in my dad’s and son’s name. I have been involved in the building trade for 14 years. I started with my dad and I want to carry on until my son is able to take over. I am rather versatile in the building trade (Extension, Roofing, Rendering, Fencing, Fibreglass, Roofing, Patios, Ground Works, Structural Works, Kitchen, Bespoke Sheds) and much more. The most important thing for me is starting and finishing a project with a happy customer.
Get in touch
A.S.M Windows
Rating: 5 out of 5
Extension Builder in Letchworth Garden City
Hi thanks for shortlisting us. A.S.M windows is a small family run business with over 10years experience in replacement Windows, Doors, Conservatory’s, Facia Soffit & Gutters, Warm roofs, Electric roller doors. We offer a high standard of workmanship and take Care of our customers homes while We work in the property. We offer financial packages to suit our customers needs.
Get in touch
Latest review:
Windows & Doors (uPVC & Metal)- 10 Jan 2023
Adam & his team were very professional, knowledgable & punctual. We were very happy with their advice & the new door & window we went with. Would defo use them again
LMB CONSTRUCTION LIMITED
Rating: 5 out of 5
Extension Builder in Letchworth Garden City
We are a Construction company based in Steeple Morden and undertake building work in the Industrial/Commercial and domestic sectors, all our trades are time served and are used to working in all types of environment. We pride ourselves in an ethos of well managed, organised and clean sites.
Get in touch
Latest review:
Conversions - General- 10 Oct 2018
I posted this job for my Mum, she had lost all enthusiasm to get her two storey extension finished so I took charge. Understandably given the first builder stole 22k (for which he was convicted) and left her with nothing. She had managed to scrape together the money to get the dry shell built bybabother builder but could not afford the quoted a ount to finish the internals. The immediate thing that needed doing was two walls knocking through from the existing house to the extension. After posting this job and inviting Lee he made contact with me that day, I passed my Mum's details to him and he contacted her and arranged to visit. He put my Mum at ease and quickly provided a quote. Lee was so reasonable that my Mum actually had him complete the remaining works including two walls knocking through, floor screeded, stud walls fitted, plastering and carpentry work. Lee was fantastic with my Mum the whole way through, communicating and sticking to every date/promise he made. The work is to a very high standard and all completed within the time frame set at the original VERY reasonable price. He often did little extras to help Mum as she is at home on her own Mon-Fri. My Mum wholeheartedly recommends Lee to anyone! I know if I need any work doing in he future I will be on the phone to him. Thank you Lee
JHF Construction Limited
Rating: 5 out of 5
Extension Builder in Letchworth Garden City
JHF Construction Ltd have been established as a limited and VAT registered company since March 2018. Located on the outskirts of Hitchin, our brand-new Studio is an example of our work and welcomes visits. We provide a reliable, professional service with innovative concepts and pride ourselves on the quality of our work. We offer everything from design through to completion and work hand-in-hand with our clients to ensure expectations are met and exceeded. Always striving to go the extra mile.
Get in touch
Latest review:
Kitchen Fitting- 27 Feb 2019
Jack and the team did a great job on our new kitchen including new electrics, tiles and underfloor heating and we’re truly delighted with the end result. Jack was always available to discuss the project and answer any questions or concerns I had and was able to quickly overcome issues we experienced relating to the kitchen units and a design error. He was always professional and gave us useful tips and input into the overall kitchen design and helped us source very nice materials. As with many small businesses, Jack and the team were juggling other jobs along side ours which meant that after some unexpected additional work on our floor, they were unable to complete the job within the original timeframe plus 2 days contingency. As a family with young children we found this really difficult so I would urge you to project manage closely. It was all totally worth it in the end though and overall I would recommend Jack and the team.
Chris Davis
Rating: 4.9 out of 5
Extension Builder in Letchworth Garden City
Hello, l have 35 years of construction experience. My trade is as a bricklayer, which has developed beyond that alone. Have worked for large & small builders over the years, mostly in residential refurbishment & extensions. Within my role project management has been a responsibility l have been given, liaising with clients and architects. If you wish any further information please contact me.
Get in touch
Latest review:
Bricklaying- 23 Jan 2025
job went well - completed in one day
Bly Contracting Ltd.
Rating: 5 out of 5
Extension Builder in Letchworth Garden City
Bly Contracting specialise in construction projects within the residential sector. Whether your building your new home or extending, rely on our expertise. We offer a range of servicees: New Build: We work alongside our private clients to develop their ideal home Home Improvement: We can work with you to enhance your existing home Bespoke Landscaping: We offer extensive landscaping services to meet your requirements External Works: We construct patios, driveways and more
Get in touch
Latest review:
Will was helpful and gave me what I thought was a good quote. He was professional throughout. We had the old drive stripped off, new concrete edges around the perimeter and replaced the shingle. I am very happy with the the finished drive it looks great. I would recommend Bly contracting to anyone needed work done in the area.
Lee Construction Builders LTD
Rating: 5 out of 5
Extension Builder in Letchworth Garden City
Lee Construction Builders LTD are your local Builders in Stevenage. We offer free quotations and can build your project for a fixed price. All our team are fully qualified and experienced tradesmen that have seen and dealt with every building challenge possible. We have a track record of happy satisfied customers as we provide a friendly, professional service, and are always respectful of our customers, understanding that our workplace is your home.
Get in touch
Latest review:
Roofing (Pitched)- 17 Apr 2016
Fantastic job; quick reply; thorough professional job. Lee really likes doing the job right; certainly not a cowboy. He really took his time in assessing the problem. Very neat job from the inside and out. Highly recommended.
Groundwork
Rating: 5 out of 5
Extension Builder in Letchworth Garden City
Hello, this is DL groundworks. I am an independent groundworker years of experience, who specialises in mostly all aspects of ground work including any decking jobs or extensions start to finish. I pride myself in working efficiently, high quality work and service.
Get in touch
Latest review:
Landscaping- 5 Jun 2022
We received several quotations for the landscaping of our rear garden, Groundworks quote was competitive and after having met Donaldo we felt comfortable they could do the job. Donaldo and his team were reliable, professional, well organised and considerate of our neighbours throughout. Donaldo maintained good communications when issues arose or aspects of the landscape design needed our input to ensure the finished outcome was to our requirements or liking. The works were complete within the timeframe agreed and to the standard we desired. I would have no trouble recommending Groundwork’s or appointing them for similar work again.
Amy's electrical and building ltd
No reviews yet
Extension Builder in Letchworth Garden City
We are a building company based in Hertfordshire, we have 15 years experience in the building industry and pride ourselves on delivering highly professional work on schedule ... My trade ....qualified electrician
Get in touch
JLS Building and Property Development
Rating: 5 out of 5
Extension Builder in Letchworth Garden City
At JLS Building and Property Development, we bring over 30 years of industry experience delivering high-quality construction and property development services across Bedfordshire and the surrounding counties. As a company, we have continued to grow and evolve, and we are proud to be accredited by the Federation of Master Builders (FMB) and SafeContractor, demonstrating our commitment to professionalism, safety, and industry standards. We specialise in all aspects of building work, including full home extensions, renovations, and structural alterations, as well as kitchens, bathrooms, carpentry, and landscaping. Whether it’s a large-scale development or a smaller improvement project, we approach every job with the same level of care, precision, and attention to detail. Our focus is on delivering a seamless and stress-free experience for our clients. We work closely with you from initial consultation through to completion, ensuring your vision is fully understood and executed to the highest standard, on time and within budget. With JLS, you’re not just hiring a builder, you’re working with a trusted, accredited team that takes pride in craftsmanship, reliability, and customer satisfaction. Get in touch today to discuss your project.
Get in touch
Latest review:
Carpentry- 11 Mar 2025
Very good, very professional from start to finish, would recommend and would definitely use again
TDA Building Ltd
Rating: 5 out of 5
Extension Builder in Letchworth Garden City
TDA Building Ltd is a professional company covering all aspects of building work with full project management for home extensions, loft and garage conversions and refurbishments. With a friendly professional attitude we pride ourselves on quality finishes, excellent communication and customer service.
Get in touch
Latest review:
We hired Tony, TDA Builders, to remove a load bearing wall in our timber frame house. After being let down by other contractors we were relieved when Tony responded and came round to estimate the work on the day and time he promised. His quotation was very detailed and precise and within our budget so we asked him to do the work. What a very pleasant person to have working in your house, professional, respectful and very clean and tidy and very knowledgable. His work was to a very high standard and he started and finished on time. I would have no hesitation asking him to undertake further work or recommending him to anyone. What an excellent job.
SB Carpentry & Construction ltd
Rating: 5 out of 5
Extension Builder in Letchworth Garden City
My brother and I both run the business in which I specialise in all aspects of Carpentry and he specialises in extensions and brickwork etc. We also offer a complete bespoke kitchen package in which we manufacture in our workshop and fit on site exactly how you want it. Any aspects of building work undertaken regardless of size.
Get in touch
Latest review:
Carpentry- 15 May 2023
Fantastic job done by Steve, very clean, tidy, on time and perfect job done, so so happy thank you.
Maytrix Construction Limited
Rating: 5 out of 5
Extension Builder in Letchworth Garden City
Maytrix Construction Ltd was formed in 2012, our management team and key staff has over 90 years of combined experience delivering high end construction projects, so you can be confident that our unique blend of expertise and experience means we deliver schemes to the exact level of detail demanded by our clients. Our Professional services include (not limited to): New Build Residential Property. Extensions and Alterations. Commercial Property. Educational & Public Sector.
Get in touch
Latest review:
New build brickwork and block work done on budget and on time. Workmanship excellent. Maytrix kept me informed on progress and were very helpful tradesmen who were always on time.

Top rated Extension Builders

Our Extension Builders in Letchworth Garden City, are rated 4 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 Letchworth Garden City?

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 Letchworth Garden City 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 Letchworth Garden City who are available and interested can respond to your post.

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

What are the hourly rates of extension builders in Letchworth Garden City?

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

Find extension builders in Letchworth Garden City with MyBuilder

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

Step 2: Compare different extension builders in Letchworth Garden City

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

Step 3: Hire Letchworth Garden City extension builders with confidence

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

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

What to ask a Letchworth Garden City extension builder before hiring?

Before hiring an extension builder in Letchworth Garden City or extension building company in Letchworth Garden City, 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 Letchworth Garden City?

An extension builder in Letchworth Garden City 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 Letchworth Garden City 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 Letchworth Garden City?

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 Letchworth Garden City 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 Letchworth Garden City 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 Letchworth Garden City

Can an extension builder in Letchworth Garden City help with planning permission?

Yes, many extension builders in Letchworth Garden City 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 Letchworth Garden City handle everything from design to construction?

Many Letchworth Garden City 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 Letchworth Garden City help with materials and finishes?

Yes, most extension builders in Letchworth Garden City 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.