Extension Builders in Harlow

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.4 (14 reviews)

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

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 Harlow

1736 Results

Sort by:

Beni The Builder Ltd
Rating: 5 out of 5
Extension Builder in Harlow
I am a mutli trade building company, and I carry out loft conversions, extensions, full refurbishments and renovations, new builds and garage conversions. I also carry out smaller jobs such as both interior and exterior decorating, kitchen fitting, bathroom fitting, tiling and general repair works. We also do fencing, paving and decking.
Get in touch
Latest review:
Fencing- 9 Jun 2020
To say we are delighted with the results from Beni The Builder, is an understatement.They did an excellent job building a substantial retaining wall using railway sleepers and installing a new fence along the top. They also helped collect materials which enabled us to start the work sooner. Extremely capable and competent team, arrived on time and left the job site clean and tidy after completing the works. They dealt with some difficult ground works easily and expertly. Price was competitive and the quality exceeded expectations. I have no reservation recommending Beni The Builder and will invite them back for some projects we have planned in the near future.
Silvertree Projects
No reviews yet
Extension Builder in Harlow
I am a specialist brickwork contractor and general building contractor I have 20 years experience in the industry. We carry out all types of work from residential to commercial. Garden walls, Extensions,New builds and Renovations. I also have references that can be provided on request.
Get in touch
Lemak
No reviews yet
Extension Builder in Harlow
Bricklaying & Pointing Services - Experienced & Reliable We offer all types of brick and block work for both domestic and commercial projects.
Get in touch
M&L builders
Rating: 5 out of 5
Extension Builder in Harlow
M&L builders doing all your Quality building work to your outstanding standers To quality builders with outstanding work to the customer’s standards
Get in touch
Latest review:
Plastering- 20 Dec 2022
Very happy customer. Mick is a very hard worker, trustworthy and reliable. He done a absolute brilliant job. would highly recommend this person 👍 Thank you so mick .
Shelomack designs
No reviews yet
Extension Builder in Harlow
I used to watch while others built but i have spent 18 years doing what I used to pay others for. I am a very physical person and consider quality to be my aim. I holds a 127 iq score because of my quick and efficient way of creating the possibilities to satisfy and bring dreams to reality. I am located in Hackney of London where I grew up. My practical experience extends beyond building houses but also conversion of cars and using recyclables for design. I am very open minded and inventive. Ready to satisfy.
Get in touch
Right Builds
No reviews yet
Extension Builder in Harlow
Right builds is a building company designed to meet all customer needs, we have been in the Construction trade for over 10 years. No job is to small or to big for us. We help customers from planning to completion.
Get in touch
Ionut Toanca
No reviews yet
Extension Builder in Harlow
A professional painter, decorator, and builder with a passion for transforming spaces. I offer high-quality finishes, reliable service, and attention to detail you can count on — whether it’s a single room or a full property makeover. From walls to woodwork, interiors to exteriors — I’ve got you covered. Let’s make your space look its best!
Get in touch
Safe Rexel Ltd
New on MyBuilder
Extension Builder in Harlow
We turn visionary designs into enduring, award-winning buildings – trusted by architects, developers, and clients across London and the UK. As a leading construction specialist, we deliver complex, high-quality residential, commercial, and mixed-use projects, recognised nationally for exceptional build quality, technical skill, and collaborative delivery. Our work has earned prestigious RIBA Awards – including landmark projects Barretts Grove (RIBA London Award & RIBA National Award 2017) and Clerkenwell Close (RIBA London Award & RIBA National Award 2018, Stirling Prize Shortlist 2021) – projects celebrated for innovation, craftsmanship, and outstanding contribution to the built environment Why Choose Us? 🏆 Proven Award-Winning Expertise – Our track record on RIBA-winning projects proves we deliver quality that stands up to national scrutiny. 🛠️ Technical Mastery – Specialists in complex builds, heritage-sensitive sites, innovative materials, and architecturally demanding designs. 🤝 Collaborative Approach – We work seamlessly with architects, engineers, and clients, ensuring design intent is protected and enhanced at every stage. ⏱️ On Time, On Budget – Rigorous planning, clear communication, and reliable delivery.
Get in touch
Pro builders
Rating: 5 out of 5
Extension Builder in Harlow
Got 10 years experience in kitchen and bathrooms installation, plumbing and internal renovation
Get in touch
Latest review:
Plumbing- 9 May 2019
Helpful, polite, tried best to resolve the mixer shower issue but the root problem is still to be sorted.
Dong
No reviews yet
Extension Builder in Harlow
I have been in the decoration industry for twenty years and can handle all kinds of repairs, expansions and renovations of houses.
Get in touch
CIRCLELETTINGs london limited
New on MyBuilder
Extension Builder in Harlow
an experienced builder with good knowledge of building, plastering, tiling job
Get in touch
Braestone Construction Ltd
Rating: 5 out of 5
Extension Builder in Harlow
Professional, trusted and reliable building contractor based in Essex, Braestone Construction is a team of skilled and highly trained construction professionals. Over 20 years experience of planning, building and development. General residential building work including extensions, renovations and new build. Groundworks, carpenters, electrician and plumber all direct employees. We also work with trusted and reliable subcontractors such as bricklayers, scaffolders etc.
Get in touch
Latest review:
Extensions- 24 Aug 2022
Lovely team of guys who are all very skilled. Damien great to deal with. Would recommend. Nick Bowen
H & A Rail ltd
Rating: 5 out of 5
Extension Builder in Harlow
We are a Civil Engineering Contractor
Get in touch
Latest review:
Groundwork & Foundations- 22 Dec 2021
I couldn't have asked for more from this firm.... called when they said they would, arrived early and did everything they could to take away the stress of this stavr in my build. Clean and tidy works, pleasant and polite workforce. I will always use this firm for my work and highly recommend them
Cosybuild ltd
No reviews yet
Extension Builder in Harlow
Cosy Build is a new chapter in our journey, rebranding after over 10 years of trusted building and construction expertise across Harpenden, Radlett, Hertfordshire, North London, and surrounding areas. Based in Hertfordshire, our professional, reliable tradesmen serve St Albans, Harpenden, Radlett, North London, and nearby regions, delivering high-quality building services with a commitment to excellence. Formerly known as Luan Ajazi Home Improvements. Cosy Build is a family-run, customer-focused building company with deep roots in the Hertfordshire and North London construction industry. Our team consist of: Highly skilled craftsmen with decades of combined experience. Fully insured and certified professionals for your peace of mind. Local experts who understand the architectural styles and regulations of the area. What We Do & What We Care About Cosy Build is a family-run, customer-focused building company with deep roots in the Hertfordshire and North London construction industry. We specialise in: Loft conversions – Maximising your home's space and value. Loft conversions – Maximising your home's space and value. Home extensions – Seamlessly blending new spaces with your existing property. Renovations – Modernisin
Get in touch
Fred
No reviews yet
Extension Builder in Harlow
Looking for jobs
Get in touch
Swiftbuid Solutions Ltd
No reviews yet
Extension Builder in Harlow
An experienced and dedicated builder with over 10 years of hands-on experience in residential, commercial, and industrial construction projects. Proficient in a wide range of building techniques, including loft conversion, house extension, house renovation etc, with a focus on quality, safety, and client satisfaction
Get in touch

4.4

Top rated Extension Builders

Our Extension Builders in Harlow, are rated 4.4 out of 5 based on 14 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 Harlow?

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

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

What are the hourly rates of extension builders in Harlow?

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

Find extension builders in Harlow with MyBuilder

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

Step 2: Compare different extension builders in Harlow

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

Step 3: Hire Harlow extension builders with confidence

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

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

What to ask a Harlow extension builder before hiring?

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

An extension builder in Harlow 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 Harlow 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 Harlow?

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 Harlow 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 Harlow 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 Harlow

Can an extension builder in Harlow help with planning permission?

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

Many Harlow 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 Harlow help with materials and finishes?

Yes, most extension builders in Harlow 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.