Starting a renovation or building project without proper measurements can lead to expensive errors. Before starting any construction work, you require an exact plan of what already exists. This is the point where a measured building survey is necessary. Professionals use this process to create a clear, detailed layout of the building, its framework, and its characteristics, whether as floor plans or a 3D model.
In this guide, you will learn all you need to know about measured building surveys and why they are essential for your project.
What Is a Measured Building Survey?
A measured building survey is basically a thorough mapping of a building. Surveyors carefully measure every part of a building’s structure to create accurate blueprints or digital models.
This survey typically results in 2D plans or a 3D model, providing a detailed representation of the building’s framework, layout, and elements. Every detail, including doors, walls, windows, and other elements, is documented with exact dimensions and spatial arrangements. The results give engineers, architects, and property owners a clear understanding of the building’s current condition.
Measured building surveys are generally used for:
- Renovation and extension planning
- Creating architectural drawings
- Heritage and conservation projects
- Legal documentation and property records
By providing accurate data, they ensure all future work is based on dependable information.
What Does a Measured Building Survey Include?
A measured building survey is commonly the output of the documents collection and files that completely explain the building. Typically, the common features include:
Floor Plans: Floor plans are overhead sketches of every floor of the building. They present the wall structure, door positions, window positions, staircases, and other internal elements in their accurate locations. In a multi-level building, each floor has its own floor plan.
Elevations: Elevations are the sketches of a building from the outside. Every side of the architect’s work is depicted, showing all the detailing of the exterior wall, including windows, doors, and the building’s overall look. This gives a picture of what the building will look like from every side.
Sections: Consider a section as a vertical or horizontal slice of the building. If you cut through a house vertically and viewed the cut face, you would see the section drawing showing how the walls, floors, and roof connect. These sketches show the interior layout, floor and ceiling heights, room setup, and floor or ceiling depths. They are highly beneficial for understanding the building’s vertical layout and the spaces inside it.
3D Models: Sometimes, rather than plain sketches, the survey provides a complete 3D model of the building. This can be a fully interactive digital model viewable on a computer. The 3D model often includes all the information from the floor plans, elevations, and sections, but in an engaging spatial form. Engineers and architects can use it for sophisticated visualisation and collision detection, and it helps with BIM workflows.
Reflected Ceiling Plans: Reflected ceiling plans present the ceiling details for every room. For example, the ceiling’s height, the soffit or beam’s shape, and the positioning of the lights and other fittings. They’re known as “reflected” because this works like a floor mirror, with the ceiling above. These plans are essential for interior designers and engineers.
Site Plan: A site plan shows the building’s location on its plot and its relationship to surrounding areas. It provides essential context for planning, design, and compliance.
Types of Measured Building Surveys
The scope of a measured building survey is determined by the property’s size, complexity, and intended use. Accurately selecting the right type of measured building survey at the outset of your design accurately meets your project’s needs.
Basic Measured Survey
A basic measured survey involves taking simple measurements of a building, like room sizes, wall thicknesses, and door and window locations. It is an appropriate choice for smaller residential buildings and simple refurbishment projects that do not require detailed drawings to develop a basic floor layout. This survey provides sufficient information about the building to perform minor renovations or create a general floor plan with minimal cost and time.
Detailed Measured Survey
Measured surveys must be very precise and are generally used for commercial properties, large renovations, or historic buildings. All the information collected from the detailed measured survey can be used by architects, engineers, and builders when planning their projects. As a result, it reduces the risk of errors and ensures that the project’s designs continue to align with existing structural elements.
3D Laser Scanning Survey
A 3D laser scan can precisely measure a building and create a 3D model of the structure. The surveyor will use the laser scanner to capture millions of points from different parts of the building, then compile them into a digital “point cloud”. Once the point cloud is compiled, the data can be used to produce detailed drawings of the building’s floor plans and elevations or even a 3D model of the building. Ideal for large, complex buildings and those of historic significance, laser scanning provides excellent detail, enabling on-time renovations and structural assessments and delivering fast, accurate results.
BIM Survey
BIM, or Building Information Modelling, is a new method of conducting measured building surveys, producing a fully detailed digital 3D model as the final product. Architects, engineers, and contractors can use BIM to visualise a building’s three-dimensional space before it is built and to simulate modifications in a digital format. BIM surveys are most beneficial for large-scale commercial developments, complex construction projects, and situations where multiple parties are working together to build a structure. BIM surveys also create a complete, long-term digital record of the building that can support future maintenance and modifications.
How is a Measured Building Survey Carried Out?
A measured building survey is a step-by-step process that delivers accurate, reliable results. By understanding these steps, property owners and professionals know what they can expect.
Initial Consultation
The first step of the survey process is the initial consultation between the surveying company and the client. During this stage, the surveyors will discuss the project requirements with the client. This ensures that the survey is created according to the client’s specific requirements, whether it’s a simple 2D drawing for a small renovation or a detailed 3D model for a large commercial project.
Site Visit
After the initial consultation, the surveyors will visit the property to measure it. The tools they use to measure include laser scanning, total stations, electronic distance-measuring devices, and digital-based measuring devices. These tools enable surveyors to accurately and quickly capture data and reduce the risk of error. Furthermore, inspecting the property helps identify areas that may pose challenges or have unique features worth considering.
Data Collection
During the survey’s data collection stage, surveyors collect measurement data for every accessible area of the building. For surveys using 3D laser scanning, millions of points are automatically recorded, forming a highly detailed point cloud of the building. The precision of these measurements at this stage is key, as they form the foundation for generating the final drawings and models.
Data Processing
After gathering measurements, they are processed with specialist software to create floor plans, elevations, sections, and 3D models. Surveyors check the drawings for inconsistencies and arrange the data in a clear format. This makes the measurement useful and reliable for architects, engineers, and constructors.
Delivery of Final Drawings
Upon completion, the drawings will be delivered to the client in agreement with the project specification, whether in PDF, CAD, or BIM format. This is the final output for their records. However, it also serves as an accurate representation of the building for design, planning, or construction. Surveyors will verify that the data within each document is accurate, identified, and appropriate for use in subsequent project phases.
When Do You Need a Measured Building Survey?
There are various instances when you may require a measured building survey:
Before Renovation or Extension
If you are planning to change how a building is used or modified, you will need precise measurements of the existing structure before generating new designs.
Planning Permission Applications
When you are submitting plans to local planning authorities, they typically require a set of detailed and accurate drawings. A measured building survey will ensure that your submitted plans accurately represent the building’s actual structure.
Property Conversion Projects
If you want to convert a residential property into multiple flats or to change the current use of a building, you will need precise information about the layout of that building.
Historic or Listed Buildings
The original drawings of older buildings are often unavailable; measured surveys provide accurate documentation for restoration or conservation projects.
Property Purchase or Investment
Investors sometimes require detailed building information before committing to major construction projects.
Benefits of a Professional Measured Building Survey
There are numerous benefits to partnering with a qualified and experienced surveying firm:
High Level of Accuracy
Using cutting-edge technology, professional surveyors can achieve a very high degree of measurement accuracy.
Reduced Risk of Errors
The pros incorporate accurate drawings into the design and construction processes, which reduces the likelihood of errors.
Time Efficiency
They use up-to-date technology, such as laser scanning devices, making data collection much quicker and easier.
Compliance with Industry Standards
Professional surveyors follow industry standards and guidelines so that their results can always be trusted to be consistent and reliable.
Better Project Planning
When architects and engineers have access to accurate information, they can develop better designs, resulting in smoother construction projects.
How Much Does a Measured Building Survey Cost?
The cost of a measured building survey is determined by the building’s size, the required level of detail, and the level of complexity. The following is a cost estimate:
- For a small residential building, priced at £400-£800
- Medium-sized residential buildings or small commercial buildings are priced at between £800 and £1,500.
- For large commercial buildings or highly detailed surveys, prices range from £2000 to £5000 or more, based on the level of detail required and the size of the property being surveyed.
Additional costs may be incurred for:
- Elevation, sections, floor plans
- 3D laser scanning services
- BIM modelling
- Complex layout or restricted access area
Conclusion
A measured building survey is an important part of the process for any renovation, extension, or redevelopment project. By providing accurate measurements and detailed drawings of an existing structure, it helps prevent costly errors and ensure seamless project execution. Having a professional is essential to ensuring your renovation or redevelopment project starts on the right foot, whether you are a homeowner or a developer.
At Bidston Draughting, we take pride in delivering accurate, measured building surveys, expertly designed to the specific requirements of residential and commercial projects. Your vision is our blueprint for success.