Extension Builders in Harlow

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.4 (13 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

1723 Results

Sort by:

SP Cranstone LTD
Rating: 5 out of 5
Extension Builder in Harlow
SP Cranstone LTD is a small but unique building company that has a wealth of experience within its company to provide a service to the domestic sector. We have several accreditations as you will clearly see on our web pages that keep us in good check. Value for money, with the right materials and service that meets your needs. Expert project management, for seamless customer experience that is hassle-free from start to finish. Complete transparency in our and pricing.
Get in touch
Latest review:
Extensions- 24 May 2018
Having been let down by my original builder, I posted my requirements on MyBuilder.com. Simon Cranstone (Simon) responded promptly and based upon my scope of work provided an initial Projected Cost (PC) budget. The project, a house refurbishment with an additional single story rear extension was clearly no problem and a "turn key" project was agreed. I was impressed by Simon's ability to explain costings albeit PC at the outset and the realistic 10-12 timeline for completion of works. My original architect was replaced by another on Simon's recommendation ensuring that the relevant Thames Water and Building Regulation/Control exchanges/requirements were met. Simon or the builders onsite dealt professionally with all the challenges arising whether it was unexpected drain works, appalling weather and even business as usual neighbour concerns. Although the PC budget was exceeded by some 30%, these were as a result of Building Control requirements and project scope creep by myself. The project was delivered on schedule. At all times the professionalism and, craftsmanship of the builders in particular were a credit to SP Cranstone. I would have no hesitation in recommending them to do all building works and happy to provide any further feedback if required.
Little Acre Homes Ltd
Rating: 5 out of 5
Extension Builder in Harlow
Little Acre Build are able to undertake all aspects of building from a new bathroom or kitchen to a complete new build home. We are members of the Federation of Master Builders and have well over 30 years experience in the industry. We have a large team of tradesmen on hand, ready to undertake and complete your project on time, on budget and to the highest of standards.
Get in touch
Latest review:
Carpentry- 22 Nov 2022
Kris was excellent, he came and resolved a problem we had with our front door swiftly, tidily and professionally. We have a newborn baby and were really struggling to get the front door open and closed due to swelling, so this was so appreciated. Thank you again Kris, would highly recommend for any building/carpentry work and Kris/Little Acre build will be our first point of call when we require any work.
Garnet Construction Ltd
Rating: 4 out of 5
Extension Builder in Harlow
Garnet Construction has over 10 years' experience in the industry and specialise in loft conversions, all types of extensions and complete renovations. Priority is given to the design and construction of all our projects with a unique obsession to strive for perfection.
Get in touch
Latest review:
Extensions- 18 Sep 2019
To start off with the job went reasonably well - we were happy with the workers and the progress. but when we neared completion the work slowed up we waited 3 months for a response from Jordan. we had an issue where his plasterer hid the plumbing access in the wall. - This cost us £500 to sort and re-decorate so we came to an agreement that this was fine and at the time i presumed that Jordan was going to sort out the building control. so we then chased and chased but obviously since he had his money he wasn't interested he answered the phone and hung up. so we called building control and there are 2 small bits to fix which are all due to his work not being up to scratch. obviously i will be paying out for this - so please be careful when using him and dont pay him until you have all of the documents as he will not resolve any issues after being paid. i have had 2 previous building projects and this was by far the worst experience going. avoid dont use him thanks
FixandFlipConstructionLtd
Rating: 4.4 out of 5
Extension Builder in Harlow
We at FixandFlipConstructionLtd take huge pride In all aspects of construction from kitchen and bathroom renovations, bedroom and study fit outs through to your larger projects such as full house renovations, extensions. High standard of work is always a must and this is executed with a reputable and reliable team.
Get in touch
Latest review:
Carpentry- 5 Jan 2025
Aaron initially impressed me with his commitment and fair pricing, delivering and installing staircases well. However, when he offered to tile a bathroom, things went downhill. Instead of handling it himself or assigning someone he trusted, he brought in a tiler he’d never worked with before. The results were disastrous—uneven tiles, poor grout work, and an overall lack of quality. Aaron offered to fix some issues but didn’t supervise the work, leaving it to me. His repairs only made things worse. After the job was finished, he ignored my detailed list of tiling mistakes and stopped responding altogether. I had to hire another tiler to fix some issues, but many problems remain because further repairs were too costly. While Aaron is an eloquent speaker and seemed committed initially, his actions didn’t match his words. I cannot recommend him and caution others not to be swayed by small talk or promises without clear oversight and proven reliability.
Daniel Gagea
Rating: 5 out of 5
Extension Builder in Harlow
We are onest builders, quick and reliable jobs, new on my builder but with lots of experience on the trade, looking for work, we do all kind of refurbish jobs, decorating, carpentry, basic plumbing and electric, new bathrooms or kitchens, back or loft extensions ,landscaping and much more We offer guarantee for our work. Everything seen on the pictures is 100% our work and we have loads of other pictures
Get in touch
Latest review:
Daniel quoted comprehensively and clearly for both jobs that I needed, building an extension and a raised patio at the end of the garden. He worked extremely hard and diligently every day. Also he would summarise what he would do next and we discussed any changes etc and which tiles or render I preferred. I am very happy with both the patio and extension and Daniel finished everything off to an excellent standard and went above and beyond the quote. I would not hesitate to use him again and recommend him highly.
Springfield Conversions
Rating: 4 out of 5
Extension Builder in Harlow
I have been in the building trade for 35 years. I undertake all aspects of building work on residential properties. I am experienced in refurbishments, extensions, garage conversions, all aspects of landscaping, interior and exterior decorating, installation of bathrooms and kitchens, driveways and all minor repair work.
Get in touch
Latest review:
Extensions- 1 Aug 2023
Originally quoted for a downstairs extension and wall interval wall removal, I went ahead with the wall removal and was very pleased with the result - Chris and the other chap were lovely and did a great job; will hire again in the future.
William Craft Construction Limited
Rating: 5 out of 5
Extension Builder in Harlow
Over the past decade LSW have built a reputation for delivering quality projects and unsurpassed added value. We provide work across Residential and Commercial sectors providing a comprehensive service, from start to finish including design, construction and maintenance.
Get in touch
Latest review:
First Build - 100k plus (commercial) technical centre & training room facility. Kept to budget, completed on time, high quality standard, observed all of our H&S requirements. Second Build - Personal - New driveway and access. Again, very high standard of build. Completed within timescale. Left premises each day in a very clean and safe environment. No hesitation in recommending them.
Linear Carpentry & Building
Rating: 5 out of 5
Extension Builder in Harlow
Hi, I'm James – with over 15 years of experience in the carpentry and building trade. Based in Much Hadham, Hertfordshire, we take on projects of all sizes, delivering high-quality craftsmanship with attention to detail. We proudly serve clients across Hertfordshire, Essex, and Cambridgeshire, covering any job within a 30-mile radius. Whether it's a small renovation or a full-scale build, we're here to help bring your vision to life.
Get in touch
Latest review:
James managed our kitchen extension project and took ownership of all carpentry, and we couldn’t have been happier with the outcome. The project was delivered smoothly and to a high standard, and James was a pleasure to have working at our home. We especially loved the outdoor pergola / cinema area and hot tub decking he built too, which was technically quite challenging and looks absolutely fantastic. I would absolutely recommend Linear Carpentry to friends - and have done!
Sean McCarthy
Rating: 5 out of 5
Extension Builder in Harlow
Have been in the building trade for over 30 years specialising in building and carpentry both domestic and comercial. We cover all aspects in a building project. All are trades are skilled trades people. We have experience in full home renovations, extensions, summer houses and out buildings, ranging from ground, work brick work to final finishes.
Get in touch
Latest review:
Carpentry- 26 Aug 2024
Sean was briliant and the finished job looks perfect. All through the process i felt comfortable that Sean was giving me the right information and that I was paying a fair price. He arrived , did the job, cleaned up and left our house like he'd never been there! I would recommend Sean to everyone looking for a real professional
R Moy Builders LTD
Rating: 5 out of 5
Extension Builder in Harlow
Experienced builder of a family run business covering a wide range of domestic and commercial work, from handyman jobs to full builds. Reliable and reasonable with recommendations from many happy customers. Plastering Extensions Refurbs Bathrooms/kichens Painting and decorating Conversions Established for over 30 years
Get in touch
Latest review:
Handyman- 6 Jan 2025
Swift response & fixed fault straight away. Excellent customer service would highly recommend.
BCON
Rating: 5 out of 5
Extension Builder in Harlow
LOUGHTON- Essex|London Helping you give your home a new look! Full refurbishment specialists bringing high quality workmanship with communication through the whole procedure. •Open plan living •Structural wall removals •Full Bathroom/wetrooms installations •Kitchens •Tiling •Flooring •Plastering •Garden renovations
Get in touch
Latest review:
Hard Flooring- 15 Apr 2026
Guy did an excellent job fitting our new flooring and skirting. It wasn’t an easy job, as we have an old Victorian cottage but he did it in good time and it looks great. Very happy. Would definitely hire him for the next project.
schertel build Ltd
Rating: 5 out of 5
Extension Builder in Harlow
we will always ensure quality service and respect to your property at the best available price. 7 years experience in brickwork, specializing mostly in garden walls
Get in touch
Latest review:
Connor re-pointed my patio and I’m really pleased with the results. The finish looks fantastic and has made a big difference overall. He worked efficiently, kept everything clean and tidy, and was great to deal with from start to finish. Very reasonably priced too. I wouldn’t hesitate to recommend him. I will definitely be calling him back when I need other work.
Building luxury lofts.
Rating: 5 out of 5
Extension Builder in Harlow
Hi my name is Clive we are an experienced loft/garage conversion company with an eye to detail experienced in overcoming problems and giving the customer what they want . We are friendly and very clean and tidy with many satisfied customers which we can supply references for . All my trades have been working for me for years and are reliable .if you use us it will be an enjoyable experience. I have 25 years experience in loft conversions 45 years as a Carpenter/builder, we like to think we can match or beat most quotes of the same quality choose building luxury lofts and you won't regret it.
Get in touch
Latest review:
Carpentry- 16 Feb 2025
Two hard working tidy guys carried out the job with no difficulties. Would definitely hire them again.
Walker Building and Carpentry
Rating: 5 out of 5
Extension Builder in Harlow
I’m a carpenter and general builder who’s been working in and around the local area with 15+ years experience, I’m hard working, friendly, reliable and I take a lot of pride in my work. I am family man at heart who enjoys sharing my passion for football with my son, reading with my daughter, and when I get a chance enjoy the odd pint in the local pub.
Get in touch
Latest review:
Carpentry- 21 Jan 2020
The job that Thomas Walker completed for me was an extremely difficult, however he was an excellent professional and completed the job which exceeded my expectations. He also offered to help with getting discounts on materials. I would definitely recommend A***
Kingsmarque construction and maintenance
Rating: 5 out of 5
Extension Builder in Harlow
All building work taken on, slating and tiling, house renovations and extensions. We have a team of tilers, renderers, plumbers, painters and myself and business partner who run each job and manage the multiple trades required.
Get in touch
Latest review:
Extensions- 25 Aug 2020
Really professional and quick to provide quotes. Unfortunately, due to COVID and our circumstances changing, we have had to cancel the job. We would definitely go back to them in the future though.
Rkay Property Services Limited
Rating: 5 out of 5
Extension Builder in Harlow
Hello to all potential new customers. Rkay Property Services Ltd are a team of highly motivated and skilled tradesmen who enjoy nothing more than completing a project for a customer in the residential or commercial area. Be it larger works such as building houses, extensions, loft conversions, kitchen design and installation, bathroom installation, full refurbs and renovations or smaller works such as painting and decorating, flooring, plumbing and electrics we have the right team for the job!
Get in touch
Latest review:
Extensions- 9 Oct 2020
Ryan and his team built a kitchen extension and installed an en suite bathroom for us. Their quote was competitive compared to others and they completed the work in the original 12 week time frame promised. They were friendly and approachable throughout and happily adapted to our changing plans as the project progressed, making suggestions to help us solve problems that came up. The work has been finished for a few weeks now and we're really pleased with the quality of the finish and have had no teething issues to address. We'd happily use them again for any future projects.

4.4

Top rated Extension Builders

Our Extension Builders in Harlow, are rated 4.4 out of 5 based on 13 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.