Extension Builders in Harlow, East of England

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.3 (12 reviews)

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Some of our top rated extension builders in Harlow, East of England

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HSS Construction
Rating: 4.6 out of 5
Extension Builder in Harlow, East of England
At HSS construction we take pride in delivering high-quality bricklaying services with over a decade of expertise in the industry.I am committed to precision craftsmanship and timely completion, ensuring that every job is built to last. We offer a wide range of services including new builds, extensions, garden walls, brick repairs, patios and landscaping. Hard and soft. Bringing your vision to life through quality building.
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Latest review:
Landscaping- 30 Sep 2025
All good thanks
J Cleary Construction ltd
Rating: 5 out of 5
Extension Builder in Harlow, East of England
here at j cleary construction we have 16 years experience in building and renovating properties, All types of building work and renovations are covered, when you come to us some of the things we cover are demolition garden builds steel work foundations knock throughs Kitchens extensions loft conversions renovations plastering carpentry electrics plumbing flooring chimney breast removal tilling roofing stud walls dry lining drainage concreting if we can fit them in Even small jobs like hanging mirrors and boxing in of pipes we can also supply kitchens and flooring at very reasonable prices
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Latest review:
Extensions- 28 Jul 2022
Top notch builder - went over and above what was needed, worked well with the architect, followed all building inspectors requirements (at times advising them), kept to the schedule & budget and kept us informed all the way. So much so friends have already hired Jack My advise is get in quick as he is being snapped up for work fast
R Moy Builders LTD
Rating: 5 out of 5
Extension Builder in Harlow, East of England
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
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Latest review:
Handyman- 6 Jan 2025
Swift response & fixed fault straight away. Excellent customer service would highly recommend.
SP Cranstone LTD
Rating: 5 out of 5
Extension Builder in Harlow, East of England
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.
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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.
schertel build Ltd
Rating: 5 out of 5
Extension Builder in Harlow, East of England
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
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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.
Springfield Conversions
Rating: 4 out of 5
Extension Builder in Harlow, East of England
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.
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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.
Daniel Gagea
Rating: 5 out of 5
Extension Builder in Harlow, East of England
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
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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.
Garnet Construction Ltd
Rating: 4 out of 5
Extension Builder in Harlow, East of England
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.
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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
Newstar Building Services Ltd
Rating: 4.9 out of 5
Extension Builder in Harlow, East of England
HI my name is Bill and I run a building company. All our work is base on recommendations costumers We work all around London.
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Latest review:
Hard Flooring- 22 Oct 2025
Enea did an incredible job, and we’re beyond happy with the final result. He was very accommodating, helped us choose the right tone of varnish beforehand, and kept us updated throughout the day by sending pictures of his progress (as we were both at work). Enea is trustworthy, and even though we didn’t have the chance to meet him in person, he left the flat securely, taking care of our keys and door. We highly recommend Enea!
Kingsmarque construction and maintenance
Rating: 5 out of 5
Extension Builder in Harlow, East of England
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.
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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.
Walker Building and Carpentry
Rating: 5 out of 5
Extension Builder in Harlow, East of England
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.
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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***
OFIX Ltd
Rating: 5 out of 5
Extension Builder in Harlow, East of England
With over 34 years experience I offer a complete design and build package as well as providing specific services for smaller contracts. I have been vetted by the Federation of Master Builders and strive to provide excellence. I am an extremely competent multi trader with a good eye for detail. With a team of experienced subcontractors I will deliver incredible quality installations on time within budget.
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Latest review:
Carpentry- 8 Mar 2025
Absolutely over the moon with Mike, he did a fabulous job. Would definitely recommend him!
Sean McCarthy
Rating: 5 out of 5
Extension Builder in Harlow, East of England
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.
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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
Ladkarn Construction Limited
Rating: 5 out of 5
Extension Builder in Harlow, East of England
We are a well established construction company with very high expectations and standards of work. We are fully insured and carry out groundworks and landscaping and have a very professional team of operatives ensuring the quality of the works completed match our very high standards. We can carry out larger projects relating to the full construction of houses, extensions or conversions.
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Latest review:
Groundwork & Foundations- 1 Sep 2025
We hired James for 5 days digger work in our garden and he was brilliant, we don’t know what we’d have done without him. He did so much extra for us, from removing a tree and its roots to lifting off and rehanging very heavy gates. We’re really grateful and hope that we can use him again for ground and building works.
T.G & Sons Construction Ltd
Rating: 5 out of 5
Extension Builder in Harlow, East of England
I have worked in Construction since 1990. I have owned and run my own Business since 1998. We undertake projects from £1k to £2M. New Builds, renovations, Extensions, Loft Conversions, Conservatories, Outbuildings, full Refurbishments and Modernisations. We have all trades available and take on every aspect of the building trade. We also provide Architectural and Maintenance services. We Plan, Design, Build & Maintain.
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Latest review:
Restoration & Refurbishment- 6 Aug 2019
We are so pleased with the result. All the guys were friendly, helpful and hard working. They did exactly what they said and kept us fully informed. We should have done this years ago. I fully recommend them. A great bunch.
Building luxury lofts.
Rating: 5 out of 5
Extension Builder in Harlow, East of England
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.
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Latest review:
Carpentry- 16 Feb 2025
Two hard working tidy guys carried out the job with no difficulties. Would definitely hire them again.

4.3

Top rated Extension Builders

Our Extension Builders in Harlow, East of England, are rated 4.3 out of 5 based on 12 reviews from customers like you.

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What types of services are offered by local extension builders in Harlow, East of England?

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, East of England 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, East of England who are available and interested can respond to your post.

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

What are the hourly rates of extension builders in Harlow, East of England?

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

Find extension builders in Harlow, East of England with MyBuilder

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

Step 2: Compare different extension builders in Harlow, East of England

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

Step 3: Hire Harlow, East of England extension builders with confidence

After gathering all the information and quotes from your chosen home extension builders in Harlow, East of England, 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, East of England extension builders are ready to help. Use MyBuilder today to find the right professional for your home extension.

What to ask a Harlow, East of England extension builder before hiring?

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

An extension builder in Harlow, East of England 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, East of England 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, East of England?

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, East of England 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, East of England 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, East of England

Can an extension builder in Harlow, East of England help with planning permission?

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

Many Harlow, East of England 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, East of England help with materials and finishes?

Yes, most extension builders in Harlow, East of England 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.