What other costs can I expect?

Whilst every project is unique, one of the first questions we are often asked is ‘What other fees can I anticipate?’ This is very difficult to answer as no two projects are the same, however we have tried to outline what other costs you can be expecting.

Below are a range of other typical fees* that may be required for a residential project. We will be able to advise you if any of these are relevant to your project once we have completed the Home Consultation.

• Digital CAD Survey: Between £2,000 and £7,500 dependent on size of the property.
• Statutory Planning Application Fees: Full Planning Application fee is £588; Householder Planning Application Fee is £528 & a Certificate of Lawful Development Fee (if your Project falls under Permitted Development) is £264. Please be advised that these fees do not include the planning service fee of £85 (excl. VAT).**
• Building Control Plans check and site visits: Between £2,000 and £5,000 (excl. VAT).
• Structural Engineer Fees: £2,000 to £20,000 (excl. VAT). This will be dependent on the scale and complexity of the project.
• Mechanical and Electrical Consultant: £5,000 to £35,000 (excl. VAT). This will be dependent on the scale and complexity of the project.
• Single Party Wall Surveyor: £0 to £3,000. This will be dependent on whether there are any party walls affected by the works and the complexity of project.
• Thames Water Build Over Agreement: starting at £130 (Class 1)***. This will only be required if there is building works over existing drainage.
• Ecology and Bat surveys: Initial site and building inspection and ecology report £500-£1,000 (excl. VAT). If required, further surveys and reports £5,000-£15,000 (excl. VAT). This will be dependent on the scale of the project and ecology that is present.
• Quantity Surveyor: typically, 2-3% of project overall value
• Tree survey: £500-£1,000 (excl. VAT) for a Tree Survey inc. Tree Protection Plan (TPP) & Impact Assessment (this is an estimate for a site with 8 trees). The cost of a tree survey is likely to vary depending on the location of the site, the abundance of trees on site and other factors.

*Note that all fees are an estimate and were correct as of September 2025.

**Note that these fees will be reviewed April each year, so are subject to change. Click here for link to planning fees.

***Note that these fees will be reviewed April each year. Click here for more information from Thames Water.