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03 · Existing buildings & works · Aerial

Drone survey

A drone survey uses a small unmanned aircraft (a drone, or UAV) to photograph, film or measure a roof, building or site from the air. It’s a quick way to see roofs, chimneys and high walls without scaffolding, and to produce maps and 3D models of a site for design and planning.

DWGuide by Dan Wallis · Updated 10 October 2026

This guide covers the rules in England. See Wales, Scotland and Northern Ireland.

32 drone surveyorsAerial
Who needs oneOwners, buyers and designers who need to see a roof, high walls or a whole site, especially where scaffolding or ladders would be costly or unsafe
Who can do itA drone operator registered with the Civil Aviation Authority (CAA), with qualified pilots and commercial insurance
WhenBefore buying, before roof or wall repairs, at the start of design, or at stages during a build

32 drone surveyors listed across the UK

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Find drone surveyors by region

South West (4) West Midlands (7) East Midlands (5) Yorkshire and the Humber (5) North West (5) North East (3) Scotland (6)

National providers (9)

Regional providers (check they cover your area) (5)

What a drone survey is used for

  • Roof and wall inspections. Close-up photos and video of roof coverings, chimneys, flashings, gutters and high walls, without scaffolding or a cherry picker.
  • Measured and topographical surveys. Overlapping photos are processed into scaled maps, ground levels and 3D models, a method called photogrammetry. Some operators also fly LiDAR, a laser scanner that measures distance with pulses of light and can often pick up ground levels through gaps in trees and vegetation, which photos can’t.
  • Thermal imaging. A thermal camera can show where heat is escaping, or where water may be trapped in a flat roof. Results depend heavily on the weather and the time of day, so treat them as a pointer to where to look, not a diagnosis.
  • Progress monitoring. Repeat flights over a building site record progress for clients, lenders and project managers.
  • Evidence for insurance and disputes. A dated photo record of a roof’s condition, for example after storm damage, or alongside a schedule of condition before neighbouring work starts.
  • Listed and historic buildings. A way to record high or fragile parts of a building without touching them.

What you get back

Inspections

Photos, video and a short report

High-resolution photos and video of the roof or walls, often with the defects marked up. Ask whether a written report by a surveyor is included, or just the images.

Mapping and measurement

Orthomosaics, 3D models and point clouds

An orthomosaic is a single, scaled aerial image stitched together from many photos. A point cloud is a 3D record made of millions of measured points. Orthomosaics, point clouds and 3D models can all be measured and brought into CAD or BIM software by your architect or engineer.

What a drone survey can’t do

  • It isn’t a substitute for a RICS building survey or a structural engineer’s report. A drone only sees surfaces: it can’t lift tiles, look inside the roof space, test for damp or judge whether a structure is sound.
  • Wind, rain and poor light can stop a flight, so allow for a change of date.
  • Airspace restrictions around airports, prisons, military sites and some other places can mean extra permissions, or no flight at all.
  • The accuracy of measured work depends on the method. If your architect will design from it, ask what accuracy the operator works to, and whether they fix ground control points with survey-grade GPS.

The rules for commercial drone operators

Drone flying in the UK is regulated by the Civil Aviation Authority (CAA). Anyone flying a drone of 100g or more needs a Flyer ID, which means passing the CAA’s online theory test. The person or business responsible for the drone needs an Operator ID, labelled on the drone, for any drone of 250g or more, or 100g or more with a camera. Anyone flying for a commercial reason, such as a paid survey, must have at least third party insurance that meets the aviation insurance rules.

Most low-risk flying is in the Open category, which has strict limits. No drone may fly higher than 120m or over crowds. The smallest drones (under 250g, or with a UK0 or UK1 class mark) can fly closer to people and in built-up areas. Larger drones must keep 50m from people and 150m from residential, commercial, industrial and recreational areas, unless the pilot holds the A2 Certificate of Competency (A2 CofC) and flies a UK2 class drone, which allows 30m from uninvolved people, or 5m in a low-speed mode, but never over them.

Work beyond those limits, such as flying a larger drone close to buildings in a town, is in the Specific category and needs an operational authorisation from the CAA. The most common is PDRA01, which covers work such as roof inspections and photographing buildings. It needs a pilot with a General Visual Line of Sight Certificate (GVC) or the newer Remote Pilot Certificate (RPC), an operations manual and insurance, and the drone must stay at least 50m from uninvolved people (30m when taking off and landing).

Photos or video in which people can be identified may be covered by data protection law, so a commercial operator has extra duties, including storing images safely and deleting anything that isn’t needed.

The drone rules keep changing. New UK class marks and registration rules came in on 1 January 2026. The GVC stops being issued at the end of 2027, leaving the newer Remote Pilot Certificates, although existing GVCs can generally still be used until they expire. Check the CAA’s website for the current position, and ask your operator which category they will fly in and why.

What to ask before you book

  • Their CAA Operator ID, and which category they will fly in: Open, or Specific with an operational authorisation
  • The pilot’s qualifications, such as the A2 CofC, GVC or Remote Pilot Certificate
  • A copy of their insurance certificate
  • Whether the site is near an airport or another restricted area, and who will get any permission needed
  • How they will respect neighbours’ privacy and keep footage of people to a minimum
  • Exactly what you will get: photos, video, a written report, or measured drawings and files

In Wales, Scotland and Northern Ireland

This guide describes the rules in England. Building regulations are devolved, so here is how drone survey works in the rest of the UK.

Wales

Aviation isn’t devolved, so the same CAA rules apply in Wales: Flyer ID and Operator ID, the Open and Specific categories, and insurance for commercial flying.

Scotland

Aviation isn’t devolved, so the same CAA rules apply in Scotland: Flyer ID and Operator ID, the Open and Specific categories, and insurance for commercial flying.

Northern Ireland

Aviation isn’t devolved, so the same CAA rules apply in Northern Ireland: Flyer ID and Operator ID, the Open and Specific categories, and insurance for commercial flying.

Common questions

Is a drone survey the same as a building survey?

No. A drone survey records what can be seen from the air. A building survey (RICS Level 3) is a surveyor’s full inspection and report on a property’s condition. Many surveyors use a drone to see the roof as part of a building survey, but the drone doesn’t replace the surveyor’s judgement.

How much does a drone survey cost?

It depends on what you need. A set of photos of one roof is a much smaller job than a measured survey of a large site with a 3D model. Operators set their own prices, so compare quotes for the same results.

Does a drone operator need permission from the CAA?

Every commercial operator needs an Operator ID, pilots with a Flyer ID, and insurance. Whether they also need an operational authorisation depends on the drone and how close to people and buildings they need to fly, so ask which category they will fly in.

My operator mentioned a PfCO. Is that still valid?

The permission for commercial operations (PfCO) was withdrawn at the end of 2020 and has no direct replacement. Ask instead for the operator’s Operator ID, the pilot’s qualifications and, for Specific category work, their operational authorisation.

Can a drone survey be done near an airport?

Most airports and airfields have a flight restriction zone around them. A drone can only fly inside it with permission from the airport, which the operator should arrange before the survey day.

Will my neighbours be filmed?

A drone may catch neighbouring gardens and people. Images in which people can be identified may be covered by data protection law, so a professional operator should keep them to a minimum, store images safely and delete anything that isn’t needed.

New to the jargon? See our glossary of terms, from air permeability to TrustMark.