Facebook Icon Twitter Icon Intsagram Icon

House extension builders creating

the dream home for you

People have many reasons to want to extend their home, to make the place they live in better suited to their changing needs. At JMW Carpentry & Builders, we can make this dream come true because we are experts in house extensions.

Whether you want a wooden house extension or a house extension in brick, if it needs to be single or double storey, or whether you required an extension at the back, side or front of your home, at JMW we can help.

We are specialist house extension builders, creating bespoke, forever homes for families living in the Cotswolds, Bath, Marlborough, North Wiltshire and West Oxfordshire.

Why not call the team at JMW today to talk about your house extension? Our projects start at around £100,000 and we focus on large house extensions that make your home perfect for you.

Do you need more space for a growing family?

Want more room but you don’t want to move house?

Are you working from home and need a dedicated space, away from the children?

Or do you want to make room for an elderly relative to live with you?


How we work on your house extension

When we start working on any house extensions, we ask our clients a few simple questions:

  • Have you engaged an architect?
  • Have you involved a structural engineer?
  • Do you have planning permission?

If you’re not quite at this stage, we are very happy to refer you to one of our trusted associates.

We work closely with architects and structural engineers who will create plans for the perfect house extension, whether you want it in wood, timber-framed or brick; at the back, side or front of the house; a single or double storey extension.

They will also guide you through the planning process to ensure all the necessary permissions are in place.

Working with you

Offering a turnkey service

It’s at this point that the JMW team can become fully involved. We offer a turnkey service, personally carrying out your house extension from start to finish.

We’re involved from the beginning, which may entail demolishing existing outbuildings or garages to make room for an extension.

Then we handle every stage of the project, throughout the building phase, and engaging trades.

We’ll fit any bathrooms and kitchens required, fully decorate to a superior standard and professionally clean the extension and the site from top to bottom before we hand you the keys. We can even landscape the grounds for you.

As house extension builders, we promise to deliver a turnkey project. Why not talk to us today?


How much will my house extension cost?

At JMW, we work with clients on larger house extensions, which start at around £100,000. Our projects have included: 

  • A large side extension in Wiltshire which involved removing outbuildings and garages, to create a new double garage with living space above. To the rear, the kitchen was extended, creating a large kitchen-diner. 
  • Another Wiltshire project entailed removing internal walls, including load-bearing walls, and creating a large, open-plan space with living accommodation, utility and bathroom. We also reconfigured the garage into a granny annexe.
  •  We removed several sheds to create a two-story extension which provided a games room, large lounge area and four sliding doors to look out on to the garden. A master bedroom and large en suite were created upstairs, while downstairs the cloakroom was reconfigured into a bathroom.

Our Gallery

House Extensions

Based in North Wiltshire

House extension builders near me

JMW are based in North Wiltshire and we are happy to work on projects up to an hour approximately from our location.

 This means we are able to build house extensions in the Cotswolds, Bath, Marlborough, North Wiltshire and West Oxfordshire. If your project is in this area, then we believe we are the local house extension builders you are looking for. We create forever homes for families by extending their property to meet their needs.

If you are based in or around these locations, talk to us today about a house extension for you and your family.

Related Projects

Our customers are happy for us to showcase our work in recognition of the workmanship achieved

Spring Grove

This extension project was a case of JMW to the rescue! The clients had been let down by an existing builder and needed us to come in and take over.

Penn House

This project was a two storey side extension with a timber clad lean-to extension to the rear of the property.


What Our Customers Think