Extension builders in Seaham

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.3 (6 reviews)

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

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 Seaham

256 Results

Sort by:

MGS Building
Rating: 4.9 out of 5
Extension Builder in Seaham
MGS building is a local building company that specialises in building, roofing and joinery. We undertake all aspects of work, which are always completed to the highest standard and to the customers satisfaction. All reroofs/fibreglass flat roofs come with complimentary 15 year guarantee
Get in touch
Latest review:
Conversions - General- 12 May 2025
Morgan and his team completed the work to a high standard and were communicative throughout. They put in extra hours to ensure the job was completed on time which was greatly appreciated.
Just Fascias
No reviews yet
Extension Builder in Seaham
Just Fascias is a family run business, started 18 years ago. We specialise in all aspects of upvc and roof work, but over the years we have branched out into building extensions, orangries and even new homes, we strive on a quick reliable service at an affordable price.
Get in touch
A&F Construction
No reviews yet
Extension Builder in Seaham
A&F Construction & Property Services We are a reliable and multi-skilled team offering a wide range of interior and exterior building services. With over 12 years of hands-on experience across multiple trades, we take pride in delivering high-quality workmanship, attention to detail, and clean, professional results on every project. Our services include: • Painting & decorating (interior and exterior) • Laminate & flooring installation • Bathroom renovations (from start to finish) • Plastering, skimming and rendering • Brickwork and general building work • Roofing and repairs • Tiling, sealing and finishing • General maintenance and home improvements We approach every job with the same level of care, whether it’s a small repair or a full renovation. We work efficiently, keep sites tidy, and always aim to meet deadlines and customer expectations. Honest, hardworking, and easy to work with — we’re here to help bring your project to life. Contact us today for a free quote.
Get in touch
Graham Edwards Building Services
Rating: 4.6 out of 5
Extension Builder in Seaham
I am a small family firm offering a wide range of building services ,Inc building,joinery plumbing
Get in touch
Latest review:
Extensions- 11 Jul 2018
Graham removed a lean to and replaced with a large brick extension to the back of the house and we are so pleased we hired him. The work started and progressed as expected and through the awful spring weather too! He finished look is great, the building inspector was really pleased with everything and as soon as had completed the extension we asked him to rip our old porch down and build a new one and luckily he had a week spare before a new job so cracked on with this too straight away. We would recommend Graham, he was hard working, tidy and just got on with it!
D J Building Services
No reviews yet
Extension Builder in Seaham
All aspects of joinery UPVC windows and composite doors Extensions and loft conversions Most general building works
Get in touch
South view builders
No reviews yet
Extension Builder in Seaham
We are a family run business in building roofing and landscaping with over 30 years experience
Get in touch
Northern Countries Construction & Groundworks
Rating: 5 out of 5
Extension Builder in Seaham
Dear Customer Welcome to our Page Your business is very important to us As a Experienced Contractor we serve the Public & Commercial Sector !! We Work Nationwide 7 days a week 365 days Year !! We offer Discount !! Fully Guaranteed Work. Construction and New Builds Extensions Brick & Block Work Retaining Walls Drop Kerb Specialists - £10Mil Public Liability Insurance and Street works Accreditations We are on Various Council Approved Contractor lists. We can deal with council on your behalf and deal with all the Applications and Permits . North Tyneside Council Hartlepool Council Gateshead Council Nottinghamshire Council Stockton Council Workington Council Northumberland Council We are Nationwide EV Electric Charging Point Contractors for Domestic & Commercial Specialist Gravel Drive way Installers We Provide Specialist Soakaway Drive ways Groundworks & Site Clearance Drainage works & Deep Drainage / S106 Approved Contractor for New Sewer Connections Yorkshire Water Approved United Utilities Approved Concrete Works & Slabs Site Clearance Works Tarmac & Reinstatements Works / Pot Holes Resurfacing works / Machine laid Car parks Demolition & Soft Strip Works Utility's - GAS - WATER & ELECTRIC Mini Digger Hire with Operator Skilled Labour to Hire on Day Rate QUALITY THAT DOESN'T COST THE EARTH
Get in touch
Latest review:
Driveways (Paved & Loose)- 5 Jun 2026
I am very happy with the dropped kerb work carried out. The team was professional, friendly, and easy to deal with throughout the process. The work was completed quickly and to a high standard, with excellent communication from start to finish. The price was very reasonable, and everything was explained clearly. Once the job was finished, the area was left clean and tidy, which was greatly appreciated. I would highly recommend this company to anyone looking for dropped kerb work. Thank you for a fantastic job!
Sean Mcroberts
No reviews yet
Extension Builder in Seaham
MACSCAFF - we are scaffolding specialists with over 12 years of experience. We are a small run family business allowing us to give competitive pricing and offer the best rate of customer care for all scaffolding requirements.
Get in touch
Ljbuildingnortheast
No reviews yet
Extension Builder in Seaham
Loft conversions garage conversions single tear extensions damp proofing rendering plastering joinery window fitting and more
Get in touch
Kings joinery
No reviews yet
Extension Builder in Seaham
A small carpentry business based in Consett County Durham specialises in interior wood work custom storage solutions doors floors kitchens and more we are also on Facebook search for kings joinery to see our past work with genuine reviews
Get in touch
J Crowther Building Services
New on MyBuilder
Extension Builder in Seaham
J Crowther Building Services J Crowther Building Services is a reliable, professional building company specialising in brickwork, stonework and general building services. We undertake a range of domestic building projects, from brick and stone garden walls, extensions and repointing to patios, paving, fencing and other masonry work. We pride ourselves on quality workmanship, attention to detail and providing a reliable service from start to finish. We work closely with customers to deliver a high-quality finish that meets their requirements and stands the test of time. Based in County Durham, we cover Bishop Auckland and surrounding areas, with travel available for larger projects.
Get in touch
SC Harris
New on MyBuilder
Extension Builder in Seaham
I have over 25 years experience as a joiner, working on domestic and commercial projects. Ranging from small jobs around the house to project management and implementation of extensions and conversions.
Get in touch
Tm civils
No reviews yet
Extension Builder in Seaham
Hi I’m Gary I’ve been in the construction industry for 25 years doing anything from installing drainage at ten metres deep to installing driveways no job too big or small
Get in touch
Diamond Builders
No reviews yet
Extension Builder in Seaham
We have 28 years of experience in the tradesman world ready to make our customers satisfied.
Get in touch
Macauley ashcroft
No reviews yet
Extension Builder in Seaham
local joiner/builder here to undertake all aspects of building works and joinery 1st fix sending all locally used merchants
Get in touch
R&Rdevelopmentsltd
No reviews yet
Extension Builder in Seaham
R&R developments ltd. We carry out all building works from start to finish on all jobs. Extension specialist
Get in touch

4.3

Top rated Extension Builders

Our Extension Builders in Seaham, are rated 4.3 out of 5 based on 6 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 Seaham?

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

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

What are the hourly rates of extension builders in Seaham?

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

Find extension builders in Seaham with MyBuilder

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

Step 2: Compare different extension builders in Seaham

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

Step 3: Hire Seaham extension builders with confidence

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

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

What to ask a Seaham extension builder before hiring?

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

An extension builder in Seaham 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 Seaham 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 Seaham?

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 Seaham 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 Seaham 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 Seaham

Can an extension builder in Seaham help with planning permission?

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

Many Seaham 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 Seaham help with materials and finishes?

Yes, most extension builders in Seaham 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.