Extension builders in Washington

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.5 (8 reviews)

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Some of our top rated extension builders in Washington

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Northern Stoneworks
Rating: 5 out of 5
Extension Builder in Washington
With years of experience in traditional and modern stonework, I specialise in all aspects of stone masonry. My services include new builds, extensions, barn conversions, stone cladding, repointing, hardscaping (porcelain,limestone and sandstone), landscaping, and the repair and restoration of period stone properties. I have worked on a wide range of projects across Northumberland and the North East, from restoring historic stone buildings to constructing high-quality new stone homes and bespoke stone features. My experience also includes two years in Canada, where I worked on premium, high-end stone masonry projects, further developing my craftsmanship and attention to detail. Whether you’re building from the ground up, renovating a traditional property, or looking for expert stonework to enhance your home, I take pride in delivering quality workmanship that stands the test of time
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Latest review:
Stonemasonry- 5 Mar 2026
Liam provided expert advice on stone selection and finish, liaised with stone supplier on sizes and quantities etc then managed the job through to completion. Very Professional job with nice finish and all work areas left clean and tidy at the end of each day. I would not hesitate to use Northern Stonework again for any masonry or stonework. Excellent.
MSL Building Group Ltd
No reviews yet
Extension Builder in Washington
MSL Building Group Ltd can help you with your extensions request in Sunderland and its surrounding cities. They’re at your disposal to listen and assist you in all your projects. Get in touch with MSL Building Group Ltd now to discuss your needs and arrange a quote.
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PWB Brickwork
No reviews yet
Extension Builder in Washington
Time served bricklayer.40 years experience of all aspects of brickwork,blockwork,stonework groundworks.including new builds and extensions..house repairs.advice and estimates gjven
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N elliott plastering
Rating: 5 out of 5
Extension Builder in Washington
I am a self employed plasterer and have been trading since 2001 my work includes plastering rendering boarding mainly but take on all aspects related to plastering
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Latest review:
Plastering- 22 Dec 2021
Nigel went out of his way to help me before Xmas, as my daughters room has been unusable since the storm a few weeks back. He fitted the work in to a time convenient for me, and all 3 lads were very helpful and friendly throughout, and also beat my other quotes. Thankyou Nigel and team, I will definitely recommend to others.
Build2
No reviews yet
Extension Builder in Washington
FROM NEW BUILDS TO DREAM INTERIORS: At Build2, we believe construction is not just about bricks and motor- it’s about building dreams with precision, passion and purpose. Specialising in bespoke new builds, extensions conservatories, double glazing, roofing and elegant interior transformations, our team delivers a seamless blend of craftsmanship and creativity. With a reputation for excellence and a commitment to timeless sophistication, we create spaces that inspire and elevate the way you live. NO JOB IS TOO SMALL We have all trades from a simple grass cutting to servicing of your boiler and EICr for landlords.
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TD Kitchen & Building Services
No reviews yet
Extension Builder in Washington
TD Kitchen & Building Services is your trusted partner for building and home renovation solutions, delivering excellence with a focus on quality. Our experienced contractors, with over 40 years of expertise, bring your vision to life on time & budget. We prioritize high standards, meticulous attention to detail, and promise a transformative experience for your home. Choose us for unparalleled craftsmanship and results that exceed expectations.
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Thomas Moody
Rating: 5 out of 5
Extension Builder in Washington
We are a small family business and a small trusted team. We specialise in stonework and take pride in our work which can always been seen in all of our projects.
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Latest review:
Demolition- 4 Sep 2025
Thomas and his dad Kevin delivered a first class service - friendly and on-time with good communication as to what to expect. The estimate was very reasonable. The work done (demolition and removal of a greenhouse and laying a concrete slab) was to a high standard and clear-up impeccable. I'll definitely hire this well-run family business again for small construction work.
On Point Joinery & Building Ltd
Rating: 5 out of 5
Extension Builder in Washington
We undertake all aspects of Joinery and Building Works to the highest possible standard, We are a reliable local company where quality matters.
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Latest review:
Loft Conversion- 13 Oct 2018
So happy with on point for our porch & loft conversion. Very professional service from start to finish with excellent communication throughout the build. All workmen were well mannered & tidied up after themselves everyday which was such a relief since I have a newborn & 2 year old. All work completed within timescale & on budget. Would definitely recommend.
I Kenny development
Rating: 4.7 out of 5
Extension Builder in Washington
All aspects of building work are undertaken. Exterior work- all landscaping hard and soft. Driveways Patios Drainage Foundations. Interior- Plastering Tiling Joinery Loft storage All work is completed to a very high standard. Free quotations with competitive prices.
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Latest review:
Bricklaying- 23 Mar 2026
Ian undertook some lintel repair work for us on our rented garages. We were happy with the first few repairs, but the last two were rushed and the work was left incomplete. Because the walls and lintels were not strapped correctly, the lintels have slipped, leaving the structure unsafe and unsupported. I have tried to resolve this amicably over the past few months, but he continually found reasons to delay fixing his mistakes. He is now completely ignoring calls and messages. We had more work lined up for him, but we will now be using someone else as we can no longer trust him to complete a job to a satisfactory or safe standard.
Fellside Developments Ltd
No reviews yet
Extension Builder in Washington
Fellside Developments Ltd is a skilled construction and property improvement company based in the North East of England. We specialise in high-quality carpentry, roofing, and electrical installation, delivering reliable workmanship across residential renovation, repair, and development projects. With a practical, hands-on approach and strong attention to detail, Fellside Developments Ltd provides a wide range of services including structural carpentry, roofing installation and repairs, electrical works, and general property improvements. Our focus is on durable construction, safe installations, and clean, professional finishes. Whether undertaking small repairs or larger renovation projects, we pride ourselves on honest communication, efficient work, and delivering results that stand the test of time.
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The Wright Brickies
No reviews yet
Extension Builder in Washington
With 20+ years of experience, we offer expert bricklaying you can trust. North East based. Specialising in new builds, garden walls, extensions, and remedial work like adjusting doorways and lintels, we deliver quality craftsmanship and a reliable service. Please view my Facebook page for pics.
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Bolder Developments Ltd
No reviews yet
Extension Builder in Washington
Bolder Developments is a professional building company specialising in high-quality new builds, extensions, renovations, and bespoke construction projects. With years of experience in luxury property development, we bring the same level of craftsmanship and attention to detail to every project—big or small. We work closely with homeowners to turn their ideas into reality, delivering exceptional results on time and within budget. Whether you’re planning a home extension, a full renovation, or a custom-built home, our skilled team ensures a smooth, stress-free process from start to finish. Get in touch today for a free consultation and expert advice on your project.
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MOLD CONSULTANCY LTD
No reviews yet
Extension Builder in Washington
Mold Design Lab is a well-established consultancy based in the Northeast of England covering projects across the UK. Our small team guarantees a very personalised but professional service, with years of experience internationally in private and commercial property design, project drawings, building consultations and construction services we are the number-one go to Consultancy in the Northeast of England and Scotland.
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B.N building services
No reviews yet
Extension Builder in Washington
Reliable and honest builder/ plasterer with 21 years experience. My work includes anything from brickwork, groundswork, plastering to pointing and rendering. All work is completed to an excellent standard
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AJ Building Solutions LTD
New on MyBuilder
Extension Builder in Washington
AJ Building Solutions is a North East construction company delivering bricklaying, building and site services for commercial clients, contractors, developers and private customers. We specialise in bricklaying, repointing, flag paving, patios, block paving, extensions, driveways and more. With over 30 years of collective experience across the construction industry, our team brings practical experience, skilled workmanship and a professional approach to every project. We serve clients across County Durham, Tyne & Wear, Northumberland, Darlington, North Yorkshire and Cumbria. No job is too small, please get in touch for your free, no-obligation quote today.
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Jmc brickwork
Rating: 5 out of 5
Extension Builder in Washington
Bricklayer with over 15 years experience covering all aspects of brickwork from garden walls , pointing , extensions to new builds
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Latest review:
John completed a rear single story extension to the back of our property last year. John’s work was excellent and he was extremely conscientious and professional. He kept us informed at all times and was always happy to discuss any queries. Would definitely recommend.

4.5

Top rated Extension Builders

Our Extension Builders in Washington, are rated 4.5 out of 5 based on 8 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.