Measured building surveys play a crucial role in the success of any house extension project. They provide accurate and detailed information about a property’s existing structure, including dimensions, layouts, and architectural features. This data allows architects, designers, and builders to plan effectively, avoid costly errors, and ensure that new extensions integrate seamlessly with the existing building.
With a wide range of surveying companies available across the UK, choosing the right provider can make a significant difference in both the planning process and the final outcome. From traditional surveys to advanced 3D laser scanning and BIM modelling, the companies listed below offer reliable and high-quality services tailored specifically for house extensions and residential projects.
1. Terrain Surveys
Terrain Surveys is renowned for delivering precise and professionally executed measured building surveys across the UK. They provide highly detailed floor plans, elevations, and cross-sections for a wide range of properties, including residential homes, historic buildings, and large commercial developments. Using advanced 3D laser scanning and total station technology, their team ensures millimetre-level accuracy in every project.
Whether you are planning a house extension, renovation, or redevelopment, Terrain Surveys supplies reliable data that supports confident design and planning decisions. Their surveys are widely used by architects, engineers, and developers, and are suitable for planning applications, refurbishment projects, and compliance documentation, making them a trusted partner across the UK.
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- Our rating: 10/10
- Price: From £1,000 per project (estimated)
- Link: Terrain Surveys
2. Cadmap Ltd
Cadmap Ltd is a highly professional and fully accredited land and building surveying company, specialising in measured building and topographical surveys across London and the South of England. With over 25 years of industry experience, they deliver precise survey data using advanced equipment such as laser scanners, GPS systems, and robotic total stations to ensure high levels of accuracy.
Their measured building surveys include detailed floor plans, elevations, and cross-sections, making them ideal for house extensions, refurbishments, and planning applications. Cadmap also provides 2D CAD drawings and 3D models tailored to architects, engineers, and developers, helping streamline the design and construction process. Their surveys are carried out in line with industry standards, ensuring reliability and compliance for a wide range of residential and commercial projects.
- Our rating: 9.5/10
- Price: From £800 per project
- Link: cadmap.co.uk
3. Multivista
Multivista is a global leader in construction documentation and reality capture services, offering advanced solutions that go beyond traditional measured building surveys. Their services include 3D laser scanning, Scan-to-BIM, drone mapping, and immersive 360° visual documentation, allowing clients to capture highly accurate, data-rich representations of buildings and construction sites.
Their technology-driven approach is particularly valuable for complex house extensions, refurbishments, and large-scale developments where precise as-built data is essential. Multivista enables architects, engineers, and developers to remotely access detailed measurements, visual records, and project data through a cloud-based platform, improving collaboration and reducing costly errors.
- Our rating: 9/10
- Price: From £1,200+ per project
- Link: multivista.com
4. Survey Solutions
Survey Solutions is one of the UK’s leading engineering surveying companies, offering highly accurate measured building surveys supported by advanced technology and experienced survey teams. Their services capture detailed internal and external building data, including floor plans, elevations, and structural layouts, using cutting-edge tools such as 3D laser scanning and point cloud modelling.
Their measured building surveys are ideal for house extensions, refurbishments, and complex development projects, with outputs available in formats such as CAD drawings, Revit models, and BIM-ready datasets. Survey Solutions is particularly well-suited for projects requiring high precision or coordination with other surveys, as they can integrate building surveys with topographical and underground data to create a complete, reliable dataset for planning and design.
- Our rating: 9/10
- Price: From £900 per project
- Link:.survey-solutions.co.uk
5. Manchester Measured Survey
Manchester Measured Survey is a professional surveying company specialising in high-accuracy measured building surveys using advanced 3D laser scanning technology. Their services include detailed floor plans, elevations, point cloud data, and BIM-ready 3D models, ensuring precise and reliable outputs for a wide range of projects.
Their expertise makes them a strong choice for house extensions, refurbishments, and planning applications, where accurate as-built data is essential. The company is known for its fast turnaround times, competitive pricing, and efficient workflow, helping architects and developers move projects forward with confidence. Their ability to deliver both 2D drawings and fully detailed 3D models ensures flexibility for modern design and construction requirements.
- Our rating: 8.5/10
- Price: From £700 per project
- Link: manchestermeasuredsurvey.co.uk
6. Cambridge Measured Survey
Cambridge Measured Survey is a specialist provider of high-precision measured building surveys, offering advanced 3D laser scanning and digital survey solutions across Cambridge and surrounding areas. Their services include detailed floor plans, elevations, cross-sections, point cloud data, and BIM-ready 3D models, all produced using the latest surveying technology to ensure exceptional accuracy.
Their surveys are particularly valuable for house extensions, renovations, and planning applications, where accurate as-built data is essential. The company supports a wide range of professionals, including architects, engineers, and developers, delivering tailored survey outputs that integrate seamlessly into design workflows. Known for their efficiency and flexible approach, Cambridge Measured Survey ensures projects are supported with reliable and high-quality data from start to finish.
- Our rating: 8.5/10
- Price: From £700 per project
- Link: cambridgemeasuredsurvey.co.uk
7. Callidus Surveys
Callidus Surveys is a leading specialist in measured building surveys, delivering high-accuracy survey data across London and the wider UK since 1999. Known for their precision and attention to detail, they utilise advanced 3D laser scanning technology to capture comprehensive building data, producing detailed floor plans, elevations, and fully coordinated survey models.
Their “whole building” approach ensures that both internal and external elements are accurately recorded, making their surveys particularly valuable for house extensions, refurbishments, and complex redevelopment projects. With a team of highly trained in-house surveyors and a strong focus on quality control, Callidus Surveys consistently delivers reliable, detailed outputs that architects and developers can depend on for planning and design.
- Our rating: 8.5/10
- Price: From £600+ depending on project scope
- Link: callidussurveys.co.uk
8. Oxford Measured Survey
Oxford Measured Survey is a specialist surveying company delivering high-precision measured building surveys using advanced 3D laser scanning technology. They provide detailed floor plans, elevations, sections, and BIM-ready 3D models, ensuring accurate and reliable data for a wide range of projects, from residential homes to large commercial and industrial sites.
Their services are particularly valuable for house extensions, renovations, and planning applications, where precise as-built data is essential. With a strong focus on efficiency and quality, they offer fast turnaround times and tailored survey outputs that integrate seamlessly into architectural and engineering workflows. Their ability to handle projects of all sizes and complexities makes them a dependable choice for both homeowners and professionals.
- Our rating: 8/10
- Price: From £750 per project
- Link oxfordmeasuredsurvey.co.uk
Select the Right Measured Building Survey Company
Selecting the right measured building survey company is an essential step in ensuring your house extension project runs smoothly from start to finish. Accurate survey data not only supports better design decisions but also helps prevent delays, unexpected costs, and compliance issues during construction.
The companies featured in this list have been carefully chosen for their expertise, reliability, and ability to deliver precise survey results. Whether you are a homeowner planning an extension or a professional managing a development project, partnering with a trusted survey provider will give you the confidence and clarity needed to bring your plans to life successfully.