Wrap-around Extension Pricing
WRAP-AROUND (L SHAPE) EXTENSION PRICES
Free site survey worth of £350 don't miss the opportunity.
Wraparound extension pricing in London can vary find out what architects say, average costs, and how to budget smartly. We prepare detailed Planning Applications, Building Regulation Drawings and Structural Calculations to achieve consent for your wrap-around extension project with our extensive knowledge and experience. Please see our wrap-around extension extension prices.
WRAP-AROUND (L SHAPE) EXTENSION PRICES
Free site survey worth of £350 don't miss the opportunity.
Wraparound extension pricing in London can vary find out what architects say, average costs, and how to budget smartly. We prepare detailed Planning Applications, Building Regulation Drawings and Structural Calculations to achieve consent for your wrap-around extension project with our extensive knowledge and experience. Please see our wrap-around extension extension prices.
Site Survey
From £350
£0
- We provide a full measured site survey with photography
- Free site survey worth of £350 ( Discount end date 21.10.2025)
Planning Application Drawings
From £1,100
From £1,100
- Existing Floor Plans, Elevations and Sections to 1:50 or 1:100 scale @ A3
- Proposed Floor Plans, Elevations and Sections to 1:50 or 1:100 scale @ A3
- Prepare Ordnance Survey map, block plan and site plan
- Providing a design options to the client with full expert support and advice
- Electronic submission of the planning application, fill in application forms and CIL questions.via the Planning Portal ( Planning application Fee to the council not included)
- Management of the planning application including liaison with the Local Planning Authority until your application has been decided
- Existing Floor Plans, Elevations and Sections to 1:50 or 1:100 scale @ A3
- Proposed Floor Plans, Elevations and Sections to 1:50 or 1:100 scale @ A3
- Prepare Ordnance Survey map, block plan and site plan
- Providing a design options to the client with full expert support and advice Electronic submission of the planning application, fill in application forms and CIL
- questions.via the Planning Portal ( Planning application Fee to the council not included)
- Management of the planning application including liaison with the Local Planning Authority until your application has been decided
Structure Calculations
From £1,200
- Structural elements drawings (walls, beams, columns, foundation,roof etc.), including their size and design
- Structural elements drawings (walls, beams, columns, foundation,roof etc.), including their size and design
- Providing a design options to the client with full expert support and advice
Building Regulation Drawings
From £1,200
- Building Regulation Drawings with the details
- Structural calculation report
- We will complete building control application forms and act as your agent to your local council or private building control inspectorate
- Providing a design options to the client with full expert support and advice
Studio20 architects
Frequently Asked Questions – Wrap-Around Extension Costs & Pricing
What is a single-story wrap-around extension?
A single-story wrap-around extension is a type of home extension that continues along two sides of a property. Typically, at the rear and down one side to create a larger open-plan kitchen/dining/family space. It’s especially popular on corner plots and homes with garden access on the side.
What affects the wrap-around extension cost?
The wrap around extension cost depends on factors such as the size and footprint of the extension, ground conditions, foundation and drainage needs, specification of finishes, roof form, and structural requirements. Larger spans and complex structural elements tend to increase overall costs.
How much is the single storey wrap around extension cost likely to be?
The single storey wrap around extension cost is typically higher than a standard rear extension, as the larger footprint increases excavation, foundations, and roofing expenses. Your architect can provide a preliminary estimate based on your property size and design brief to help set realistic expectations.
What is the cost of wrap around extension per square metre?
The cost of wrap around extension per square metre varies depending on finish level and build complexity, but many projects use this metric as a budgeting guide. A qualified architectural team can refine it based on site specifics, structural needs, and local build rates for a more accurate projection.
How can architectural design reduce the wrap around extension cost?
Good architectural design helps control the wrap around extension cost by optimising the layout, reducing structural complexity, ensuring efficient use of space, and specifying materials that balance quality with value. Early design decisions steer the cost before construction begins.
When should I ask about single story wrap around extension costs?
It’s best to ask about likely single story wrap around extension costs once an architect has completed a measured survey and initial concept design. This lets them assess site constraints and design options, enabling a more reliable cost estimate before detailed planning or building work begins.