Extension Builders in Harefield

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.1 (18 reviews)

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Some of our top rated extension builders in Harefield

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Sher group of builders Ltd
No reviews yet
Extension Builder in Harefield
Hi everyone, Please get in touch for reasonable quotation : ( SHER GROUP OF BUILDERS LTD) Company no : 12538248 Based in Hayes (west London) Loft conversion, extension, new build home, Complete home renovation,bathroom,kitchen Electrical,plumbing, All building work undertaken
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Sonic Building Supplies Ltd
No reviews yet
Extension Builder in Harefield
At Sonic, we provide expert construction, plumbing, electrical and heating services for residential and commercial clients. With years of hands-on experience and a commitment to quality workmanship, our licensed technicians deliver reliable solutions—from routine maintenance and emergency repairs to full system installations. Whether you're dealing with a leaky pipe, faulty wiring, or a broken boiler, we’re here to help 24/7. Serving London, Surrey, Sussex, Hampshire, Berkshire, and surrounding areas, we pride ourselves on prompt service, transparent pricing, and customer satisfaction.
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Prime brother
No reviews yet
Extension Builder in Harefield
We do excellente Extensions jobs with good price which makes your life easier with positive attitude. We make your life easy ( problem solving)
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SANDYSTONE CONSTRUCTION LIMITED
No reviews yet
Extension Builder in Harefield
Hello to everyone , All Building Work Undertaken, Such As Rear Extension, Side Extension, Refurbishment, Painting, Loft, Tilling For Roof, Roofing, Guttering, Bathroom, Carpet, Kithen And Bedroom Wardrobes, Plumbing, Electric ( re-wiring), New Build Houses !
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Volodymyr Girkovskyi
Rating: 4.7 out of 5
Extension Builder in Harefield
I am responsible, I do my job carefully, I have extensive experience in building and renovating houses.
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Latest review:
Handyman- 9 Oct 2025
Good job, done as agreed
A-tech Building Services Ltd
Rating: 5 out of 5
Extension Builder in Harefield
We are a dynamic and profesional construction company, with a vast experience over the last decade and more, offering high quality build at a very competitive price always in mind with the latest legislation in safety and durability.
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Latest review:
Bathroom Fitting- 7 Nov 2025
Amazing work done by Antonel and his colleagues! The job was done to a very high quality standard and they were very thoughtful towards my needs always keeping good communication from the start of the process. Antonel promised me a very tight deadline of 5 days and he made sure this was met, always ensuring the job was done to a very high standard, I couldn’t have asked for more. Definitely someone I would recommend to anyone.
Eurocenter-online Ltd
No reviews yet
Extension Builder in Harefield
I wanted to become a construction worker since I was a child and I became one. I like what I do and that's why I do it very professionally to satisfy every client who chooses me.
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E.r.m electrical services
No reviews yet
Extension Builder in Harefield
We are ERM Electrical Service, a team of six dedicated professionals, specializing in electrical work for buildings and constructions. We provide safe, efficient, and tailored solutions for each project.
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Gill brothers limited
No reviews yet
Extension Builder in Harefield
Gill brothers ltd is a trusted family run business based in the heart of West London with a decade of experience. Our fully qualified team of plumbers can cater to all your plumbing needs. We pride ourselves on our high standard of workmanship, using only the best tradesmen. Every project is completed with our clients desires at the forefront. We take pride in our work delivering effective communication, reliability and integrity to achieve cost saving measures and meet deadlines.
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Hodder’s construction ltd
Rating: 5 out of 5
Extension Builder in Harefield
Hi my name is Daryl I’m a bricklayer by trade but do a lot of other trades such as fencing, landscaping, driveways, automatic garage doors, and groundwork’s. I’ve been working in the construction industry For over 10 years now me and my team have a high standard of work please give me a call for a free quote.
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Latest review:
Fencing- 19 Jan 2025
Excellent job completed in 2 days, would recommend and will be using again.
A&s builders and contractors
No reviews yet
Extension Builder in Harefield
We are team of qualified and professional tradesmen covering all aspect of building work, full house wiring, plumbing, bathroom renovations, painting and decorating, extentions and even double glazing. Our team is very professional and customer satisfaction is our first priority.
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Taiz Builders
No reviews yet
Extension Builder in Harefield
**🔨🏡 “Your Dream Home, Our Expert Hands!” 🏡🔨** Looking for top-notch craftsmanship that’ll make your home the envy of the neighborhood? You’ve come to the right place! 💪✨ we don’t just build – we **create magic**! From stunning bathrooms that feel like **luxury spas** 🛁 to flawless tiling, plumbing, and renovations that’ll make your jaw drop, we bring **passion, precision, and a whole lot of elbow grease** to every job. ✅ **Reliable & Punctual** – We show up on time, every time! ✅ **Top-Quality Work** – Because you deserve nothing but the best! ✅ **No Mess, No Stress** – We leave your space **sparkling clean**! ✅ **Affordable Prices** – Luxury look without the luxury price tag! Why settle for **ordinary** when you can have **extraordinary**? Call us today, and let’s turn your vision into **reality**! 🔧✨
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S R Builders
No reviews yet
Extension Builder in Harefield
I have over 25 years of experience in the trade, having worked in the family business founded by my father. We specialize in both new builds and extensions, including double stories, loft conversions, and rear extensions. We have a portfolio of completed projects available for your review. Our approach is meticulous, treating every job as if it were our own home. We maintain a clean work environment and consistently deliver high-quality results to a high specification. As a registered gas engineer, we also offer comprehensive plumbing services, including boiler replacements, servicing, landlord safety checks, and all major plumbing works.
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Ion luca
No reviews yet
Extension Builder in Harefield
Bricklaying blocks,bricks
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On
No reviews yet
Extension Builder in Harefield
General building work jobs experience 16 years within the construction industry. I have completed Varius extensions of all kinds. we have a great team here that can provide the quality and reassurance you are seeking.As we pride ourself in only high end and professional works for all my customers.
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M&M Building
Rating: 4.5 out of 5
Extension Builder in Harefield
Bathroom and Kitchen renovation, floor and wall tilling, wooden floor, kitchen and bathroom plumbing, painting, wood renovation
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Latest review:
Bathroom Fitting- 19 Jan 2021
Efficient, good service. Work not carried out due to job being bigger than expected but good advice given. Will reschedule.

4.1

Top rated Extension Builders

Our Extension Builders in Harefield, are rated 4.1 out of 5 based on 18 reviews from customers like you.

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

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

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

What are the hourly rates of extension builders in Harefield?

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

Find extension builders in Harefield with MyBuilder

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

Step 2: Compare different extension builders in Harefield

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

Step 3: Hire Harefield extension builders with confidence

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

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

What to ask a Harefield extension builder before hiring?

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

An extension builder in Harefield 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 Harefield 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 Harefield?

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 Harefield 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 Harefield 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 Harefield

Can an extension builder in Harefield help with planning permission?

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

Many Harefield 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 Harefield help with materials and finishes?

Yes, most extension builders in Harefield 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.