Design Costs

We appreciate that for most people extending their home is a large undertaking fraught with potential problems and expense and that it may be the first time that they have been involved with the planning and construction process. For this reason at the start, and as the project develops, we are completely clear about what will be required and the cost. We aim to ensure that there are no surprises or ‘hidden’ extra costs.

Where there are elements that cannot be costed – for example structural calculations which may depend on the final design – we will give you an approximate cost following our first visit and a fixed cost as soon as the final design is agreed.  

Initial Meeting - For most projects a telephone conversation is sufficient for us to be able to provide a fixed price quotation for the design work and planning applications. Occasionally a longer 'on site' meeting may be required to discuss the options available and the planning process itself.

Permitted Development - Where the project can be completed within the rules for a 'Permitted Development' - From £300.00 including discussing the project with local planners to confirm that the works are within the permitted development rules.

Planning Applications - Full drawings of existing & proposed floor plans, elevations and sections, submitting the application and any amendments called for by planners– prices from £300.00

Local Authority Planning Application Fees – Currently £150.00   

Building Regulations - Preparing and submitting a Full Plans Application based on the planning drawings and including changes called for by Building Control – prices from £250.00

Structural Calculations – Most extensions will require structural Calculations for elements involving beams and roof changes, the cost of these calculations will vary with the size and design of the works. Your quotation will include guidance on this but typically you should expect the charges to be in the range £150.00 to £450.00 for most domestic extensions.

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