Home Extensions and Garden Rooms

Whether you are renovating or extending your home or adding extra space with an attractive outdoor office or garden gym, the By Design Construction team will deliver the sleek, sharp and modern finishes you’re looking for.

  • Bristol, Bath and South West region
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Do you have an enquiry?

Please contact us using the form below and we will be in touch.

What we do...

A modern single storey extension can create a light, bright family space that can transform the way you live and enjoy your home. You can add stylish bespoke outdoor spaces or a contemporary garden room for a relaxed indoor-outdoor lifestyle.

A rear or wrap around extension with an open plan kitchen and dining area could add value to your home and transform your evening meal times into social events, or you could add a spacious new master bedroom and bathroom suite. It’s a great way to create additional space without the disruption of moving home. 

Even in a restricted space you could create a small garden office or separate playroom for your children to enjoy. 

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Why Choose Us?

Many extensions can be built as ‘permitted development’ under the planning rules, without the need for additional planning permission. Depending on your requirements, we can also work with a trusted local architect who can prepare detailed plans and help you gain any permissions and approvals you need.

experienced team

We are committed to providing you with a personal and highly professional service.

Fully qualified

We take pride in working safely, in a logical sequence, and carefully, to keep disruption to a minimum.

Mindful workers

We will always work with the greatest consideration for your neighbours.

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Our Services

The By Design Construction team specialises in creating beautiful bespoke designs with exceptional attention to detail to make sure everything from your initial concept to your finished project is perfect for you.

Home
Extensions

Garden
Rooms

General
Building

Structural
Alterations

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How It Works

We will take time to understand how you want to use your new space and how it will fit with your lifestyle. We will give you clear and professional advice about all the practical details so you can be confident you will have a solution that meets your needs. 

1.

Fill in our contact form or
call us on 07889152576 if you have any questions or would like to receive a free quote.

2.

A member of out team will be in touch as soon as possible to answer your questions or chat more about your project.

3.

We will send through your free quote and if you are happy to go ahead, schedule a suitable time for work to be completed.

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Testimonials

See what some our happy customers have to say…

Olly - Bedminster
The job was completed to a very high standard… a very very clean and tidy worker, courteous and friendly, a nice guy. Even my neighbours are impressed with the work carried out and the fact that my front garden is tidier now than it was before he arrived… Thanks Byron I would Re-employ Byron without hesitation
Helen - Portishead
We chose to work with By Design on a large (1000 sqft) wrap around extension. There were a number of challenges to overcome including party wall agreements, lack of working space and the need to keep services live as we occupied the house during the works. By Design were excellent in terms of planning, deliveries, consistency of attendance and the works were completed very efficiently and to a high standard. I would not hesitate to recommend them for large domestic projects.
Grant - B&S
We are a commercial main contractor and By Design complete brick/blockwork and general building packages for us on behalf of some of the regions best known companies. They are a trusted sub contractor who are committed to delivering work safely and to a high standard.
Richard - Brislington, Bristol
Quote was competitive and job was completed in a timely manner. Work was done to a very high standard and it was clear that the employees where knowledgeable in the task set. Would recommend to friends and family and would definitely use them again if the need arises.
Graham - Hanham
Byron is absolutely fantastic to work with. He displayed the patience of a saint and was ready to help out wherever possible. I was in a tight spot with the mortgage company and he slotted the job into his busy schedule to help with the house purchase. Not only did he do a superb job, but he was extremely attentive to detail. This was a very messy job which he managed somehow to work his magic and keep the place spotless. Communication was also first class, responding to emails diligently and in good time. I couldn't recommend him enough and will definitely be looking to get him back in to do some other jobs.
Cassie - Keynsham
We contacted Byron about building a large single storey extension across the width of our house as well as completing work on our outdoor space. He arranged to meet us at home to have preliminary chats and was really helpful in regards to what we needed to do regarding architects and planning etc. After receiving his quote for all work promptly we were booked in for a few weeks ahead. We loved the fact that Byron gave us assurances that him and his team would focus on our build fully. Byron and Luke were on site everyday, they made incredible progress and kept us up to date every step of the way. He arranged all aspects of the build, from rendering, painting and decorating, electrics and plumbing, we had no worries at all. They were incredibly polite and respectful to us and our neighbours, each evening they left the sight incredibly tidy and up together. They finished on schedule and we are so happy with our new space, we were sorry to see them leave in fact. We look forward to using them on any future projects and would not hesitate recommending them to anyone.
Bristol,
Avon,
BS31 2NB