Extension Builders in Knebworth

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 3.9 (15 reviews)

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Some of our top rated extension builders in Knebworth

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MYD Studio London Limited
Rating: 5 out of 5
Extension Builder in Knebworth
MYD STUDIO London limited is a Design-Led Architectural and Planning consultancy focusing on New Build ,Extensions, Loft Conversions, Change of use and Flat conversion projects in different Boroughs in London. Whether you are looking to increase the size of your home, make the most of its current size through an internal alteration, or gain planning permission in order to increase its value before selling, we will help you to produce a planning application to meet all of your expectations.
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Latest review:
Extensions- 6 Aug 2022
Majid has been great in producing drawings for our rear extension. He's also helped explain the whole build process to us from design, building inspection, and building. We received our drawings in under 10 days from the initial consultation and site visit. Majid was accomodating and was able to visit the site on weekends for the initial consultation. Always a pleasure to deal with and has been easy to reach over the phone or email. Would highly recommend Maji and MYD Studio London to anyone looking for an architect.
Curraj Construction Ltd
No reviews yet
Extension Builder in Knebworth
What sets Curraj Construction apart is our dedication to quality and client satisfaction. We don’t just build structures - we build long-term relationships. Every project we take on is managed in-house by qualified, skilled professionals who bring years of experience and a hands-on approach to ensure smooth delivery. Our work is fully insured and compliant with UK building regulations. We never compromise on materials or workmanship. We understand that your home is your most valuable asset, so we treat every project with the respect it deserves - whether it's a small renovation or a large-scale build. With transparent quotes, reliable timelines, and an approachable team, we make construction feel simple, not stressful.
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John
No reviews yet
Extension Builder in Knebworth
General brickwork
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Hoxhaj
No reviews yet
Extension Builder in Knebworth
WE BUILD YOUR DREAM!!
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Ali builder
Rating: 5 out of 5
Extension Builder in Knebworth
Hey I go with the name of Ali builder! I been working in the building field for the last 20 years and have got many clients and every client I work for I make sure I do the 100 percent perfect !
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Latest review:
Mr Muhammad is a great guy with a lot of skills and he was refer to me by friend and he has done my work very nice and on time . Very professional man with great sense of hummer
Samuel Motac
New on MyBuilder
Extension Builder in Knebworth
Reliable Building & Home Improvements I provide reliable, professional building and home improvement services for homeowners across London and the surrounding areas. With professional experience working in residential construction and project management, including my role working with Motacus Constructions, I bring a high standard of workmanship, organisation and attention to detail to every project. I undertake a range of residential projects, including brickwork, blockwork, repointing, garden walls, landscaping, patios, concrete bases, drainage, property repairs, kitchen and bathroom installations, and general interior improvements. Whether you need a small repair, a home improvement project or help bringing your ideas to life, I offer a straightforward, reliable service with attention to detail and clear pricing.
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Ferati
No reviews yet
Extension Builder in Knebworth
Transform Your Space with Professional Drylining Services Looking to enhance your interiors with expert drylining? Our skilled team delivers top-notch drylining solutions tailored to your needs. Whether it's for residential or commercial projects, we ensure high-quality finishes that stand the test of time!!
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ZBRUCH TEAM LIMITED
No reviews yet
Extension Builder in Knebworth
We are doing all types of dry lining jobs: Metal stud partitions, metal ceiling, grid ceilings, all kinds of plaster-boarding, tacking and dot&dab, insulation, loft insulation, plastering and tape and joint, loft conversion and any type house extension, We can supply all materials as well Also we can do transportation job,if people are moving in and out. Please be in touch with us and we will deal with prices Kind regards ZBRUCH TEAM
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Kaseno Group LTD
Rating: 5 out of 5
Extension Builder in Knebworth
Our company is based in London. We do all aspects of the construction. Our main target is to achieve the finest quality of our services and to satisfy any of the clients' requirements deliver the project on time and achieve a reasonable price.
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Latest review:
Kitchen Fitting- 19 Jan 2019
Very good, professional ,trustworthy team.I can recommend them to anybody. Their communication was excellent. The work they have done is of high stardard and was done on time.
Gabriel Marocico
No reviews yet
Extension Builder in Knebworth
Hi if you want a nice and tasteful bath appeal to me 👌
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thompsons carpentry and construction
Rating: 4.9 out of 5
Extension Builder in Knebworth
Thompsons Carpentry and Construction, based in Bedfordshire, is a trusted, full-service construction company proudly serving clients within the 40-mile radius. With over 11 years of experience in the construction industry, we bring expert craftsmanship, reliability, and a customer-focused approach to every project we undertake. We specialise in all aspects of construction, including carpentry, roofing, brickwork, structural work, renovations, and conversions. From small home improvements to large-scale structural projects, our team delivers high-quality workmanship built to last. We also offer guarantees on all work, with flexible warranty lengths tailored to each job for added piece of mind. At the heart of the business is a simple mission; to bring every customer's vision to life while working closely with them at every stage, ensuring all work is completed efficiently, professionally, and to the highest standard. We pride ourselves on transparent communication, attention to detail, and a commitment to delivering results that exceed expectations. Whether you're transforming a space, repairing a structure, or building something completely new, Thompsons Carpentry and Construction is here to make it happen with quality and care
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Latest review:
Roofing (Pitched)- 5 Sep 2026
Calvin did a high-quality temporary patch on my cracked lead roof and took the time to meticulously examine the area before providing a quote for the permanent fix. He clearly takes pride in his work, and I wouldn't hesitate to hire him again.
BrownBricks Construction
No reviews yet
Extension Builder in Knebworth
"Welcome to Brown Bricks Constructions, your local builders with a witty touch! From painting and decorating to handyman work and everything needed within the house, we've got you covered. With our skilled craftsmen and friendly approach, we turn your house into a home. No task is too big or small for us – whether it's fixing a leaky faucet or transforming your space with a fresh coat of paint, we handle it all with precision and flair. Trust Brown Bricks Constructions for quality workmanship, attention to detail, and a touch of local charm. Let's build something wonderful together!"
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Schs
No reviews yet
Extension Builder in Knebworth
We’re specialist in plumbing and boiler installation, were also doing good extension building job , were working in Watford , Bromley, harrow, all over london.
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PLANNING APP LTD
Rating: 5 out of 5
Extension Builder in Knebworth
We create architectural drawings. We are specialised in applications for planning permission and building regulations and co-operate with local structural engineers for structural calculations, party wall surveyors and building companies. Our projects include extensions, lofts, garages, house&flat conversions in different councils all around London. If you are thinking of extending, converting, or splitting your property do not hesitate to contact us for a free first consultation & quotation.
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Latest review:
CAD / Drawings- 23 Sep 2020
Marius has been doing a great job and put in an extra effort to ensure we were happy with the outcome. I can not recommend Marius highly enough, especially as he managed to fix an issue with the council that we had from someone else drawings. He was patient and very well prepared. Went an extra mile and gave us different ideas/options. He was flexible with timings and most importantly with price. Had by far the best quote and did an exceptional job.
Bricklayer
New on MyBuilder
Extension Builder in Knebworth
Over 7 years experience, quality guaranteed
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George The Builder
No reviews yet
Extension Builder in Knebworth
Reliable and experienced builder specialising in extensions, renovations, brickwork and general building services. I deliver high quality workmanship with attention to details, clear communication and projects completed on time and within budget. No matter the size of the job, i work professionally and treat every property with care
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3.9

Top rated Extension Builders

Our Extension Builders in Knebworth, are rated 3.9 out of 5 based on 15 reviews from customers like you.

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

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

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

What are the hourly rates of extension builders in Knebworth?

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

Find extension builders in Knebworth with MyBuilder

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

Step 2: Compare different extension builders in Knebworth

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

Step 3: Hire Knebworth extension builders with confidence

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

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

What to ask a Knebworth extension builder before hiring?

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

An extension builder in Knebworth 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 Knebworth 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 Knebworth?

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 Knebworth 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 Knebworth 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 Knebworth

Can an extension builder in Knebworth help with planning permission?

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

Many Knebworth 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 Knebworth help with materials and finishes?

Yes, most extension builders in Knebworth 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.