Extension Builders in Hertfordshire

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 Hertfordshire

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Marra Constructions Ltd
New on MyBuilder
Extension Builder in Hertfordshire
MARRA CONSTRUCTIONS LTD Building • Renovations • Extensions 🏗️ Our Services Extensions & conversions Plastering & rendering Painting & decorating Kitchen fitting & installation Bathroom fitting & refurbishment Flooring Tiling Partition walls & room conversions General building & renovations Quality workmanship • Reliable service • Free quotations
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Innovate carpentry
No reviews yet
Extension Builder in Hertfordshire
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.
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Elite Construct, Design & Build
No reviews yet
Extension Builder in Hertfordshire
With over 20 years of experience in the trade, our philosophy is rooted in a passion for delivering high-quality construction services, tailored to the needs of each client. Serving Hertfordshire and the surrounding areas, we specialise in extensions, roofing and internal fittings, as well as a variety of other construction works. We pride ourselves on providing expert craftmanship, attention to detail and a commitment to excellence, ensuring every project is completed to the highest standards. What sets us apart is our dedication to building strong relationships with our customers. We believe that open communication and offering a personalised service are the foundations of a successful project. From initial consultation to project completion, we work closely with you, offering you expert advice and innovative solutions to bring your vision to life. Choosing us means choosing a team that values trust, quality and reliability. We understand that your home or business is one of your most important investments, and we treat every project with the care and professionalism it deserves Let us help you create spaces that are not only functional, but beautiful and built to last.
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Golden Construction 2007 Ltd
No reviews yet
Extension Builder in Hertfordshire
I am a highly skilled construction worker with excellent communication skills having over 30 years’ experience in the construction industry including costs estimations, surveys, site inspections, ground work, building, mechanical, carpentry, joinery. I also have good working knowledge of plumbing & electrical.
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Prela LtD
No reviews yet
Extension Builder in Hertfordshire
I have strong experience in gardening, landscaping, and house repairs. I am confident in all aspects of the work I do, including maintenance, renovation, and practical hands-on tasks. I am dedicated, hardworking, and always focused on delivering high-quality results. I take pride in my work, learn quickly, and adapt easily to different types of jobs. I am reliable, motivated, and committed to completing every task safely, professionally, and on time
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DimiLTD
No reviews yet
Extension Builder in Hertfordshire
We are dedicated to providing top-quality workmanship and reliable service for all your home improvement and maintenance needs. Whether it’s plumbing, electrical work, carpentry, or general repairs, our experienced team is committed to delivering excellent results on time and within budget. Customer satisfaction is at the heart of everything we do. We take pride in our attention to detail, transparent communication, and honest pricing. From small fixes to larger projects, you can trust us to treat your home with respect and care. Let us help you bring your ideas to life or keep your property in perfect shape. Contact us today for a free consultation!
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sbg services
Rating: 5 out of 5
Extension Builder in Hertfordshire
I am safety conscious and able to fully concentrate on tasks. I like to keep my work zone in a clean condition and I’m trying to unfold my activity in a good organized steps.
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Latest review:
Groundwork & Foundations- 7 Nov 2024
From start to finish, Bogdan and his team were exceptional. After dealing with a previous builder who caused numerous delays, I found SBG Services. Bogdan came by the same day to assess the job and impressed me with his extensive knowledge. Given my tight schedule, he got to work immediately. I’ve never seen a builder work as hard as his team; they labored tirelessly from morning to night to ensure the project was completed promptly without compromising quality. Every trade I've had since has commented on their attention to detail. In just three weeks, they completed two extensions and transformed my garden. I will definitely be calling Bogdan back to handle my front garden early next spring.
Cristian Anton Popescu
No reviews yet
Extension Builder in Hertfordshire
professional builder with 25 years of experience in renovations, refurbished, window and door installation, loft conversion, extensions, conservatories, kitchen installation
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Bond Construction London Ltd
No reviews yet
Extension Builder in Hertfordshire
We are Bond Construction London Ltd, a construction and maintenance company operating in London and Hertfordshire. We have been trading since January 2015, but have extensive experience in double and single extensions, loft conversions and Houses of Multiple Occupation (HMO's) property conversions. As well as this, we complete renovations and alterations both on residential and commercial properties. All our work is guaranteed and we are fully insured for all aspects of construction.
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Gudgeon’S groundworks and construction
No reviews yet
Extension Builder in Hertfordshire
Gudgeons Groundworks & Construction is a Hertfordshire-based contractor specialising in residential extensions, new builds, and structural groundworks. We deliver high-quality construction from foundations and drainage through to superstructure, working closely with clients, architects, and engineers to ensure every project is completed to specification and the highest standards. From single-storey and multi-storey extensions to full new-build homes and outbuildings, we provide a reliable, end-to-end service built on craftsmanship, attention to detail, and clear communication.
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Real Hammer
No reviews yet
Extension Builder in Hertfordshire
We offer a full range of services for the construction of lofts and extensions.
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Kalafuldeco
Rating: 5 out of 5
Extension Builder in Hertfordshire
❌ We Turn Houses Into Kalaful Homes ❌ 350+ REVIEWS / 5 STAR RATING X⭕️X - WE'LL MATCH ANY REASONABLE QUOTES - X⭕️X Hi, This is Cristina in The Office. We Specialise in Flooring / Painting Int / Ext Building Services - Kitchens / Bathrooms / Lofts / Extensions.etc +£25 Each - Plane / Trimming Doors if required +Removal £50 - £75 Each Room + Disposal £100 - £300 If Required FLOORING ESTIMATES / WE ALSO DO PAINTING Fitting Beading / Scotia is Free, Inc in the Job Fitting Skirting is Min £200+ / Hallway Min £250+ Kitchen / Bathroom Min £200+ Laminate / Lvt Click ( Sub Floor Must be Reasonablly Level ) Straight Runs - £20m2 / Inc Hallways £25m2+ MIN £100 UPTO 5m2 Engineered Click Straight Runs - £25m2 / Inc Hallways £30m2+ MIN £150 UPTO 5m2 Hardwood T&G / Tongue & Groove Straight Runs - £30m2 / Inc Hallways £35m2+ MIN £200 UPTO 5m2 Herringbone - £40 - £45m2+ Cash Deals + 20% on Bank Transfer or if Invoice is Required - Payments To be Made End Of Each Day ❌ Must be Able to Provide Off Street Parking / Permits as The Crew Needs Access to The Vehicle at all Times. Thanking you in Advance Christina & Kam @ Kalaful Deco PAINTING ESTIMATES PAINTING ONLY - NO WALLPAPERING We also do Flooring / Gardening / Man & Van + Handyman Jobs Single Room - £300 Inc Minor Filling & Sanding / All White ) + £75 / 2 Colours / Woodwork £50+ £150 Extra To Paint on Fresh Plaster Living / Double Room - £400 Inc Minor Filling & Sanding / All White + £75 / 2 Colours / Woodwork £50+ Hallways- £450 - £750 Inc Working around 4-8 Doors Thanking you in Advance Christina & Kam @ Kalaful Deco
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Latest review:
Hard Flooring- 8 Sep 2026
The floor has turned out perfectly, Kam did a great job! Thanks Kam!
S&r building ltd
No reviews yet
Extension Builder in Hertfordshire
New build Extension Loft conversion Full refurbishment
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LPB Land Developments Ltd
No reviews yet
Extension Builder in Hertfordshire
We have been in the construction business for more than 25 years ranging from general building works to new build developments. We have also refurbished large buildings in the London areas on behalf of clients and main contractors.
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Matt smith
No reviews yet
Extension Builder in Hertfordshire
A Brick work Company with over 30 years experience. -New Builds -Extensions -Driveways and Patios -Garden walls -Rendering -insurance work
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JS Construction & Property Maintenance Ltd
Rating: 5 out of 5
Extension Builder in Hertfordshire
We have over 20 years of experience in the building, construction and property maintenance industry. Whatever your building needs maybe, we can provide support starting from initial consultation, drafting your plan, finalising budgets, designing, building and aftercare support.It’s all about headache-free work .References are available on request .we would always invite you to visit a property we have or are working on so you can view our workmanship. We have excellent reviews on Check a Trade .
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Latest review:
Extensions- 13 Apr 2023
Jas and his team were fantastic and completed the initial build in a wonderful timeframe. Highly recommend Jas.

3.9

Top rated Extension Builders

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

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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 Hertfordshire?

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

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

What are the hourly rates of extension builders in Hertfordshire?

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

Find extension builders in Hertfordshire with MyBuilder

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

Step 2: Compare different extension builders in Hertfordshire

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

Step 3: Hire Hertfordshire extension builders with confidence

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

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

What to ask a Hertfordshire extension builder before hiring?

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

An extension builder in Hertfordshire 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 Hertfordshire 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 Hertfordshire?

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 Hertfordshire 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 Hertfordshire 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 Hertfordshire

Can an extension builder in Hertfordshire help with planning permission?

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

Many Hertfordshire 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 Hertfordshire help with materials and finishes?

Yes, most extension builders in Hertfordshire 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.