Design and build services
House extensions in Surrey
Surrey Build Group designs and builds high end house extensions across Surrey, including single storey rear extensions, side returns, wraparounds and double storey extensions. One team handles the architecture, structural engineering, planning and build, and your agreed build cost is locked in from the day you appoint us.
Overview
How we deliver extensions
A good extension changes how the whole ground floor works. We design around the way you live, opening the back of the house into a kitchen, dining and family space with rooflights, large glazed doors and steel beams that remove the walls you no longer need.
We often combine an extension with a loft conversion in one programme of work, which saves on scaffolding, design fees and the time you spend living with builders. One client had a loft conversion and a large extension completed together and moved straight into the finished space.
Why Surrey Build Group
Why homeowners choose us
A streamlined, comprehensive service supporting you through the whole journey, from concept to completion. The people who design your home work beside the people who build it, so nothing gets lost between consultants and contractors.
A streamlined, complete service
We support you through the whole journey, from your Project Kick Start Meeting to the day you move into your new space.
One experienced team
Architecture, engineering and construction expertise together under one roof, talking to each other every day.
Full pricing transparency
Your agreed build cost is locked in when you appoint us, protecting you from unexpected costs during the build.
How it works
From concept to completion in six steps.
A clear route from your first call to the day you move into your new space, with one team throughout.
Project Kick Start Meeting
We talk through your plans, look at your home and explain clearly what is possible and what is realistically likely to be approved.
Architectural design
Our in house architect draws your plans with you, and you can refine them until the layout works for the way you live.
Planning and engineering
We handle the design, planning and pre build admin, including conservation areas, and our engineers complete the structural calculations.
Your build cost locked in
When you appoint us, your agreed build cost is locked in, protecting you from unexpected costs during the build.
Managed build
A dedicated site crew, project manager and project coordinator run the build, with daily updates through your client portal. Any extras are priced openly before they go ahead.
Snagging and sign off
A dedicated member of our team clears every snagging item before sign off. We build to a plastered finish, with optional decoration packages available.
Our work
Recent projects by our team
Open larger photoAshenden, Guildford GU2 
Open larger photoThe Mount, Guildford GU2 
Open larger photoAshenden, Guildford GU2 
Open larger photoThe Mount, Guildford GU2 
Open larger photoAshenden, Guildford GU2 
Open larger photoThe Mount, Guildford GU2
Questions
Extensions: your questions answered
Do I need planning permission for a house extension?
A single storey rear extension can often be built under permitted development: up to 3 metres deep on an attached house or 4 metres on a detached house, and no more than 4 metres high. Larger rear extensions may be possible through the prior approval process. Double storey extensions and homes in conservation areas usually need planning permission, and side extensions have their own size limits. We confirm the right route and handle the application.
How long does a house extension take to build?
Build time depends on the size of the extension, the groundworks and the lead time on glazing and steels. We give you a written programme before work starts, and you can follow progress every day through your dedicated client portal.
Can you build an extension and a loft conversion at the same time?
Yes. We regularly deliver both as one project, with one design, one set of approvals and one build team. It is usually quicker and more cost effective than two separate projects.
Do I need a party wall agreement for an extension?
If you are building on or close to the boundary with a neighbour, or digging foundations within 3 metres of their building and below the level of their foundations, the Party Wall etc. Act 1996 is likely to apply and notice must be served. Party wall agreements are arranged by you, and we offer advice and support so you know exactly what is needed.
Advice
Advice on extensions
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Building in a Surrey conservation area: lofts and extensions
Surrey has many conservation areas, from town centres to village greens. Here is how they change what you can build, and how to design a loft or extension that gets approved.
Read the article -
Designing a kitchen extension that works: light, layout and glazing
A kitchen extension is the most used space in most homes. Here is how we plan the layout, light and glazing so it works every day, not just on the day you move in.
Read the article -
Removing a load bearing wall: steels, calculations and sign off
Knocking through to create an open plan kitchen is one of the most popular changes we make. Here is how a load bearing wall is removed safely and legally.
Read the article
Where we work
Extensions across Surrey
We work across Elmbridge, Epsom and Ewell, Guildford, Mole Valley, Reigate and Banstead, Runnymede, Spelthorne, Surrey Heath, Tandridge, Waverley and Woking, serving homeowners across GU, KT, RH, TW, SM and CR postcodes.
Other services
More ways we can help
Loft conversions
Velux, dormer, hip to gable and mansard lofts, plus bungalows expanded upwards, designed and engineered in house.
Design and build
In house architects and structural engineers working with our own build team, under one contract.
Structural alterations
Knock throughs, steel beams, chimney breast removal and new openings, designed by our structural engineer.
Garage conversions
Integral and attached garage conversions into offices, bedrooms and family rooms, plus detached garage renovations.
Project management
A dedicated site crew, project manager and project coordinator running your build, with daily updates in your client portal.
Project Kick Start Meeting
Ready to talk about your project?
Book your Project Kick Start Meeting. We will talk through your plans, explain what is possible and follow up with a design and a fixed build price.
- In house architects and structural engineers
- Your build cost locked in when you appoint us
- A dedicated site crew, project manager and project co-ordinator
Prefer to talk? Call 0203 603 9777 or email hello@surreybuild.co.uk.