Extension Builders in Washington

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 5 (6 reviews)

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Some of our top rated extension builders in Washington

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LKR Building Services LTD
No reviews yet
Extension Builder in Washington
We are a company that has been going 8 years now with 20 years experience in building & 5* reviews on google,Facebook,Checked & Vetted with plenty of returning customers.
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Adobe Building Services
Rating: 4.7 out of 5
Extension Builder in Washington
We are a small family business offering a friendly but professional service, we have over 30 years experience and undertake all types of building and roofing work.All work is fully insured and guaranteed and references can be supplied upon request.
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Latest review:
Bricklaying- 8 Oct 2025
Very pleasant man who did the job but haven’t received certificate for work which he said I would get have contacted Norman waiting to see if he replies
Complete joinery solutions ltd
Rating: 4.7 out of 5
Extension Builder in Washington
Welcome to Complete Joinery Solutions. We undertake all aspects of Joinery work full house refurbishments garage conversions all building works. All work is carried out by fully qualified tradesmen. Check out are great reviews on Checkatrade website over 180 very happy customers.
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Latest review:
Conversions - General- 3 Mar 2021
So glad we picked complete joinery solutions Ltd. We had no worries all the way through the job. Wayne kept us up to date with the works all the way through. Great communication. Nothing was too much trouble. Thanks Wayne. We have now asked them to refurb our kitchen.
Impact BRC Limited
No reviews yet
Extension Builder in Washington
We are a dynamic construction firm dedicated to delivering high-quality building services, with a strong focus on residential extensions. Our experienced team of skilled professionals has a proven track record in transforming spaces and enhancing the functionality and aesthetic appeal of homes. We understand that each project is unique, and we take pride in our collaborative approach, working closely with clients to bring their visions to life. From initial consultations and design to the final finishing touches, we ensure that every step of the construction process is executed with precision and care. We prioritize safety, sustainability, and compliance with all building regulations. Our commitment to quality and excellence has established our reputation for reliability and professionalism within the community. I am excited about the opportunity to continue building on this foundation and to work with you on your next construction project.
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Durham Stonemasonry & Restoration
Rating: 5 out of 5
Extension Builder in Washington
Professional time served Durham Cathedral trained Stonemasons our work is to the highest quality Standards. Before setting up Durham Stonemasonry in 1999, I previously worked at Durham Cathedral for 16 years. Lewis our second stonemason also worked at The York Minister for 5 years then 19 years at Durham Cathedral. Carl our third stonemason was trained by myself and Lewis with 3 years at York college There is only 3 of us in our team who are qualified Stonemasons, to the highest standards.
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Latest review:
Stonemasonry- 2 Dec 2020
Fire damaged stonework above an electricity meter box and around a kitchen window. An awkward job but DSR were able to rise to the challenge. They turned up when they said they would so the job could interface with the window installers. They were also confident and competent enough to work in the vicinity of the meter box without the need to require disconnection which maintained our electricity supply. The quality of the finished stonework was very good and the lads were pleasant on site. All round good job and very satisfied, would easily recommend.
Cramlington Builders
Rating: 5 out of 5
Extension Builder in Washington
Hi there, my name's Michael and I am a time served joiner, self employed over 34 years. I always leave a clean and tidy job, finished to a standard both myself and the customer can be truly proud of. My time served in the industry speaks for itself!
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Latest review:
Cramlington Builders demolished our existing conservatory and built us a beautiful sun room on the same base. I was delighted with Michael and his team, they were really professional and very switched on. Michael was a great communicator and was ever so reliable. When the glazing turned up to site it was Michael who immediately spotted that the wrong glass had been delivered and that it was not safety glass. We would never have know that and Michael had the glazer return to site to swap the glass. We found the team to be happy in their work and they delivered a really great project for us on-time. The price was the cheapest of the three quotes received and we will definitely use Cramlington Builders again.
D&A builder & maintenance
No reviews yet
Extension Builder in Washington
Hi my name is David and I have been in the building trade for 22 years in that time I have built many houses extensions roofs and even plastered everything out I would love to show you my work. Thank you.
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DJS Masonry LTD
Rating: 5 out of 5
Extension Builder in Washington
DJS Masonry is an established building company, we offer a full building service from plans to completion finished to a high standard. All work is carried out by experienced time served tradesmen. All jobs are project managed to give our clients a hassle free experience. Services we offer include Groundwork’s Brickwork Stonework Joinery Plumbing Roofing Plastering Electrics Plastering Landscaping
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Latest review:
Extensions- 31 Mar 2026
Darren and the lads were brilliant from start to finish. Any issues that came up were dealt with straight away, and the whole job was managed really well throughout. Darren handled all the different trades and kept me informed at every stage, which made the whole process far less stressful. He was on site throughout the build, always available on the phone, and clearly took real pride in the work. I would thoroughly recommend Darren to anyone looking for a reliable builder for an extension.
A Mensley Building Services
Rating: 5 out of 5
Extension Builder in Washington
I am Andy, I have worked in the building Industry since leaving school 23 years ago. For the last 10 years I have been a self-employed Builder. I pride myself in being very approachable, genuine and getting the customer the work done they want.
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Latest review:
Extensions- 2 Oct 2018
We got a cracking good job from Andy and his team on our 1st floor extention in Longbenton. They were all reliable good tradesmen and nice lads to deal with. Andy also had good ideas while doing the work and any extras that we wanted were swiftly dealt with. We would gladly recommend Andy and his team to carry out any building project for clients and we also found Andy's estimates for our building project to be very competitive. We would certainly use him again for any future work on our property.
Stephen
No reviews yet
Extension Builder in Washington
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CJB BRICKWORK
No reviews yet
Extension Builder in Washington
If you’re planning any brickwork, stonework, or general building projects, we’d be happy to help. Based in Gateshead, we proudly cover the entire North East. Services we provide: • Brickwork • Stonework • Extensions • New builds • Alterations (windows & doors) • Knock-throughs (RSJ & lintel replacements) • Garden walls • Grinding & repointing • Lime pointing • Fencing • Concreting, foundations & more Facebook cjb brickwork CJB Brickwork — Quality. Reliability. Craftsmanship. That’s the CJB Brickwork promise
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Mf building services ne ltd
No reviews yet
Extension Builder in Washington
Founded on over 25 years of experience, our company is dedicated to exceeding customer expectations through dependable service, expert solutions, and a relentless focus on satisfaction.
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Capital lofts ltd
Rating: 5 out of 5
Extension Builder in Washington
Capital lofts & Construction are a design and build building company with over 20 years of experience, we can provide a full package from Building your loft and Extension to Architectural drawings, planning and structural engineers calculations. All our builds come with a 5 year guarantee.
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Latest review:
Loft Conversion- 17 Feb 2021
The quote was competitive and kept to, with very reasonable charges for extras requested. The team were very accommodating and did everything I asked as the job progressed. In addition, some of Steve's suggestions made a big difference to the final result which turned out excellently. Overall they did a great job and I would definitely use again and recommend to others
PRIME GROUNDWORKS AND CIVILS LTD
Rating: 4.8 out of 5
Extension Builder in Washington
We are a family run company with a combined experience of over 40 years. We do all aspects of building work, groundworks and landscaping from foundations, drainage and operating heavy plant to block paving.
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Latest review:
Landscaping- 27 Feb 2021
Gary and his team cut corners from the beginning. A job that was quoted to take 4-6 weeks ended up taking around 14 weeks and even then was not completed by gary and his team due to him walking off the job. They used substandard materials which meant things needed replaced before the job had even finished. Overall the “finishing touches” for the job were absolutely horrendous. A child’s playhouse had nails sticking out of the wood. The nails in the fence had all rusted, the lawn wasn’t laid correct so couldn’t drain. The level on extension was completely wrong. Gary himself was quite rude and Him and his team were extremely unreliable. 100% would not recommend, save your time, money and sanity
Dean Foulger
Rating: 5 out of 5
Extension Builder in Washington
Hi my name is Dean I'm a time served bricklayer and do all types of building work new builds, house extensions, structural alterations, loft conversions, stone work, repointing, rendering and landscaping, we do it to the highest standard so we can to make sure the customer is always happy.
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Latest review:
Extensions- 16 Mar 2020
Dean and his team have done an amazing job on our single storey extension. From start to finish they kept us in the loop of everything that was going on. You can tell they all take pride in their work. Very dedicated and always tidy up. Over the moon with the end result and would recommend Northeast Brickwork to anyone. They will be our first port of call for any future work.
Gmh mini plant hire and Groundworks
No reviews yet
Extension Builder in Washington
Skilled groundworker plenty of experience committed to quality work at high standards very reliable company. All ways looking for new work no task to big
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Top rated Extension Builders

Our Extension Builders in Washington, are rated 5 out of 5 based on 6 reviews from customers like you.

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

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

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

What are the hourly rates of extension builders in Washington?

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

Find extension builders in Washington with MyBuilder

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

Step 2: Compare different extension builders in Washington

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

Step 3: Hire Washington extension builders with confidence

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

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

What to ask a Washington extension builder before hiring?

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

An extension builder in Washington 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 Washington 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 Washington?

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 Washington 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 Washington 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 Washington

Can an extension builder in Washington help with planning permission?

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

Many Washington 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 Washington help with materials and finishes?

Yes, most extension builders in Washington 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.