2025 Survey Costs (ex VAT)
| Property | Standard | Fast Track (+25%) | Rush (+50%) | | --- | --- | --- | --- | | 2–3 bed | £400–£600 | £500–£750 | £600–£900 | | 4+ bed | £500–£800 | £625–£1,000 | £750–£1,200 | | Commercial | £800–£1,500 | £1,000–£1,875 | £1,200–£2,250 |
Survey Deliverables Reference
| Deliverable | Format | Use | | --- | --- | --- | | Floor plans | DWG + PDF | Design reference | | Elevations | DWG + PDF | Planning submission | | Sections | DWG + PDF | Building regulations | | Site plan | DWG + PDF | Planning boundary |
Measured Building Survey for Planning Applications: A Complete Guide
A measured building survey for a planning application must meet specific requirements. Getting the survey specification right from the outset — before the architect begins design work — is one of the most important steps in a smooth planning application. This guide explains what a measured building survey for a planning application needs to include.
Why Planning Applications Need Measured Surveys
Every planning application requires accurate existing drawings as part of the submission. The planning authority validates the application against these drawings — checking that the proposed works comply with the relevant planning policies, that the proposed dimensions are accurate, and that the relationship between the proposed works and the existing building is correctly represented.
An inaccurate or incomplete existing drawing — one that does not show the correct floor areas, ceiling heights, or boundary positions — can cause the planning application to fail validation or be refused on factual grounds. The cost of a measured building survey is small compared to the cost of a failed or delayed planning application.
What the Planning Authority Requires
Each planning authority has specific requirements for the drawings submitted with a planning application. These requirements typically include:
Existing floor plans: Accurate floor plans of all levels of the existing building, showing all room layouts, window and door positions, wall thicknesses, and floor areas. The floor plans must be at an appropriate scale — typically 1:50 or 1:100 for residential applications.
Existing elevation drawings: Accurate elevation drawings showing the existing appearance of the building from all visible directions. The elevations must show the positions of windows, doors, and any architectural features.
Existing section drawings: At least one building section showing the floor levels, ceiling heights, and the relationship between different parts of the building. The section allows the planning authority to assess the vertical proportions of the building.
Existing site plan: For applications involving extensions or new buildings, an existing site plan showing the property in the context of the site, including the boundary positions, any existing structures, and the relationship to adjacent properties.
Proposed drawings: The existing and proposed drawings must be clearly labelled and distinguishable. The planning authority needs to be able to see what currently exists and what is proposed.
Scale and Format Requirements
Planning authorities have specific requirements for the scale and format of drawings:
Scale: Residential applications typically require drawings at 1:50 or 1:100 scale. Commercial applications may require 1:100 or 1:200 scale. The appropriate scale depends on the size of the property and the level of detail required.
Format: Drawings should be provided in DWG (AutoCAD) format and PDF. DWG format allows the planning authority's officers to view and annotate the drawings. PDF format allows the drawings to be included in the application without requiring specific software.
Labelling: All drawings must be clearly labelled — the sheet title, the property address, the drawing number, the revision, and the date. The planning authority may reject drawings that are not clearly labelled.
Floor Area Calculations
Planning applications typically require floor area calculations — the Gross Internal Area (GIA) and, for residential applications, the floor space calculations required by the relevant permitted development or policy requirements.
For residential extensions, permitted development rights are often limited by the amount of additional floor space that can be created. Accurate floor area measurements from the measured building survey are used to calculate how much additional space the proposed extension will create.
For commercial applications, floor area calculations in accordance with the RICS Code of Measuring Practice may be required. These should be prepared by a qualified surveyor.
Site Plans for Planning Applications
For extensions, new buildings, or changes of use, the planning application requires an existing site plan showing:
- The property boundary and its relationship to adjacent properties
- The existing building footprint
- Any existing structures, outbuildings, or hardstanding
- The positions of any trees that may be affected by the proposed works
- The access and parking arrangements
The site plan should be at an appropriate scale — typically 1:200 or 1:500 for residential applications — and should be referenced to the Ordnance Survey National Grid and datum.
Topographical Surveys for Planning Applications
For applications involving significant extensions or new buildings, a topographical survey may be required in addition to the measured building survey. The topographical survey captures the levels and features of the site, which are used to assess the impact of the proposed development on drainage, overlooking, and the streetscene.
A topographical survey for a planning application typically includes:
- Spot levels at regular intervals across the site
- Contour lines showing the shape of the land
- The positions of any trees, hedges, or significant landscape features
- The boundary positions in relation to the existing building
A combined measured building and topographical survey — commissioned together from the same provider — is typically more cost-effective than commissioning the two separately, and ensures that all survey data is referenced to the same coordinate system.
Conservation Areas and Listed Buildings
If the property is in a conservation area or is a listed building, additional documentation may be required for the planning application. This may include:
- A heritage statement assessing the impact of the proposed works on the building's significance
- Detailed existing drawings of architectural features that contribute to the building's character
- Photographic record of the existing building
A measured building survey for a heritage property should include detailed drawings of any architectural features that contribute to the building's significance — cornices, fireplaces, staircases, and other period features.
Section 73 Applications and Amendments
If you are applying to amend an existing planning permission — a Section 73 application — you may still need to submit accurate existing drawings. The planning authority will assess the amended scheme against the existing drawings that were submitted with the original application.
In some cases, a measured building survey may not be required for a Section 73 application if the original drawings are accurate and the amendments are minor. However, if there is any doubt about the accuracy of the original drawings, commissioning a fresh measured building survey is advisable.
Obtaining Existing Drawings
Before commissioning a new measured building survey, check whether existing drawings are available from the planning authority's records. Most planning authorities hold copies of drawings submitted with previous planning applications, which may be available through the planning portal or on request.
Existing drawings from the planning authority can be useful for initial design work, but they should not be relied upon for the final planning submission. Planning drawings are often approximate, produced for the planning purpose rather than for construction, and may not reflect the property as it currently exists.
Commissioning a fresh measured building survey before the planning submission ensures that the drawings are accurate and reflect the property as it currently exists.
Getting the Survey Specification Right
The most important thing when commissioning a measured building survey for a planning application is to get the specification right from the outset. Confirm with the planning authority — or with your architect — exactly what drawings are required, at what scale, and in what format.
Provide the surveying company with a copy of the planning authority's requirements, or ask your architect to specify the deliverables clearly. This avoids disputes about whether the survey deliverables meet the application requirements.
icelabz provides measured building surveys for planning applications across the UK. We are familiar with the requirements of all London planning authorities and can advise on the survey specification needed for your application. Contact us to discuss your planning application requirements and receive a fixed-fee quote.
Pre-Application Advice and Survey Requirements
Many planning authorities offer a pre-application advice service, where they will review the proposed scheme before a formal application is submitted. As part of the pre-application process, the planning authority may request a measured building survey to support the proposals. Commissioning a measured building survey before the pre-application meeting ensures that the design team has accurate existing data to work from. This allows the pre-application proposals to be developed with confidence, reducing the risk of significant redesign at the formal application stage.