What a Building Surveyor Does and When Homeowners Need One

A building surveyor assesses how a building is put together, finds defects and advises on repair, maintenance, alterations and extensions. For a house buyer, the same person usually writes the RICS Level 2 or Level 3 home survey. Much of a building surveyor's work happens on site, where they deal with contractors and clients, though they also work in an office writing detailed reports.

A building surveyor understands how buildings are put together, typical defects, and how they can be improved. They determine the construction type and condition of existing buildings by looking for defects. They then advise on your options for repair, maintenance or restoration.

They are involved in the development of new buildings and in surveying existing buildings. They are also involved in the maintenance of buildings with historical or architectural importance. A building surveyor will prepare planning and building regulations applications and advise on alterations, conversions and extensions for homeowners looking to improve their living space.

Their expertise extends to legal and dispute matters. Building surveyors advise lawyers on a building's condition, for example in landlord and tenant disagreements or neighbour disputes. Related specialisms listed by RICS include expert witness work, insurance assessment, access auditing, building control and party wall work.

Building surveyor, home survey and RICS levels

When you buy a house, a building surveyor is the person who inspects the property to uncover hidden problems. They report their findings using a standard framework of home surveys. The designations to look for in a home surveyor are AssocRICS, MRICS or FRICS.

RICS Level 1 Home Survey

Level 1 describes the general condition of the property and flags risks and urgent defects. It suits a conventional house, flat or bungalow built from common materials and in good condition. The surveyor will note defects but will generally not provide advice on how to manage them. This is the most basic of the three levels.

RICS Level 2 Home Survey

Level 2, still widely called a HomeBuyer Report, is a visual, non-intrusive inspection. It suits conventional homes in reasonable condition and adds practical advice on repairs and maintenance. You can buy this as a survey only or as a survey and valuation combined. The surveyor will look at the roof, walls, floors and visible plumbing, but they will not lift carpets or move furniture.

RICS Level 3 Home Survey

An RICS Level 3 Home Survey is the most comprehensive report and suits a large, older or run-down property. It is also the right choice for a building that is unusual or altered, or one where major works are planned. It is still widely called a building survey or full structural survey. It is the most detailed of the three levels. Reports use condition ratings shown as traffic lights to highlight the urgency of each problem.

Building surveyor or structural engineer

Homeowners often confuse building surveyors with structural engineers, but they perform different roles. A building surveyor looks at the entire property to assess its overall condition, identify a wide range of defects and suggest general maintenance. A structural engineer concentrates on the structure of the building.

A structural engineer designs the structure of a building. A building surveyor may bring in a structural engineer where beams or movement are involved.

Building surveyor or building control

A building surveyor works directly for you to assess a property or manage a construction project. Building control is an independent statutory function that enforces national building regulations. You must check whether you need building regulations approval before you construct or change buildings in certain ways.

You can use your local council's building control department or a private registered building control approver. Building regulations approval is entirely different from planning permission. The two are separate, so check each one for your project.

If you do not comply with building regulations the person doing the work could face prosecution and a fine. The building control body can require you to pay for faulty work to be fixed or altered. Without approval you may lack the compliance certificates needed when selling your home, which can cause problems when you sell.

Building surveyor, quantity surveyor or land surveyor

People often confuse these distinct surveying roles. A quantity surveyor works purely on construction costs and contracts. They calculate the materials, labour and time needed to build a project to keep the budget on track. They do not inspect existing homes for damp, rot or subsidence.

A land surveyor, or topographical surveyor, focuses entirely on measuring land to map boundaries and ground levels accurately. A building surveyor deals with the physical fabric, condition and design of the building itself. If you are buying a house, planning a standard extension or trying to diagnose a damp problem, you need a residential building surveyor.

When a homeowner needs a building surveyor

As a homeowner, you will need a residential building surveyor when you face specific property challenges. Typical situations include:

• Planning a rear extension or a loft conversion that requires technical drawings.
• Preparing planning applications to submit to your local council.
• Drafting building regulations applications to ensure the work is safe and compliant.
• Agreeing a detailed scope of work with builders before a major repair begins.
• Serving a party wall notice on a neighbour before you build on a shared boundary.
• Resolving a formal dispute with a landlord or a neighbour over the condition of a building.

You will also need a surveyor if you share a boundary with a neighbour and plan to alter it. The Party Wall etc. Act 1996 applies in England and Wales only. Under this law, a building owner must give written notice before building on or at the boundary, working on an existing party wall or structure, or excavating near a neighbour's foundations.

Notice is at least two months ahead for party structure works and one month for new boundary walls and excavations. The neighbour has 14 days to respond to the notice, and silence counts as a dispute. In a dispute, the owners appoint one agreed surveyor or one each, who produce a party wall award. You cannot act as your own surveyor for this process.

The building owner usually pays all surveyors' fees where the work is solely for their benefit. An award can be appealed in the county court within 14 days. Starting party wall work without serving a party wall notice is a serious mistake, which can lead to an injunction.

When a buyer needs a building surveyor

You need a building surveyor as soon as your offer on a property is accepted and well before you exchange contracts. Relying on the mortgage valuation is a common mistake. A mortgage valuation is not a survey. It is a limited check carried out solely for the lender's benefit to confirm the property is worth the loan amount.

You need a dedicated home survey to uncover hidden defects before you commit to the purchase. The surveyor will visit the property, inspect it visually and write a report detailing its true condition. This gives you the solid evidence you need to get repair quotes. You can then decide whether to proceed, renegotiate the purchase price or walk away, with your conveyancer involved to handle the legal side.

These rules apply in England and Wales. In Scotland, the system is different. The seller provides a Home Report before marketing the property, which already includes a Level 2 survey and a valuation. New-build buyers may use a snagging survey instead.

Buyers often misunderstand the surveying process and make errors that cost them money or delay their purchase. You must avoid these common mistakes:

• Relying solely on the mortgage valuation instead of commissioning a dedicated home survey.
• Choosing the cheapest survey level for an old or heavily altered house.
• Not reading the terms of engagement and being surprised the surveyor did not lift carpets or move furniture.
• Comparing quotes that are for different survey levels or where one excludes a valuation.
• Ignoring recommendations for further investigation when the surveyor spots a hidden risk.
• Trying to renegotiate the purchase price without getting written repair quotes first.
• Booking the survey too late and delaying the exchange of contracts.

You must match the survey level to the age, type and condition of the property. Choosing the cheapest level for an old or altered house is a common mistake because that level may not give you enough detail. If you are unsure which report suits the property, read about which level to pick to help you decide.

Always read the terms of engagement before you instruct the surveyor. This document explains exactly what they will and will not do. Home buyers are often surprised when the surveyor does not lift carpets, move heavy furniture or test the gas and electricity, but these limitations are standard practice for a visual, non-intrusive inspection.

Survey costs and timeframes

The cost of a building surveyor depends on the type of work you need them to do. For design work, planning applications or party wall work, fees depend on the job, so get written quotes from local firms.

For home buyer surveys, the surveys are sold at a fixed fee quoted up front. The price is driven by the survey level, the property value, the size, the age, the complexity of the building and its location. The table below shows typical inspection times and typical price ranges for each home survey level.

These figures are typical 2026 prices and your local quotes will differ. Reports usually follow within about three to ten working days after the physical inspection takes place.

How to check a surveyor is qualified

Check a surveyor's credentials before you instruct them. RICS members maintain strict rules of conduct and hold professional indemnity insurance to protect you if they make a serious mistake. The designations to look for after a surveyor's name are AssocRICS, MRICS or FRICS.

You should also look for the words RICS Regulated for the firm itself. You can confirm both the individual and the firm are genuine on the official RICS Find a Surveyor service. RICS regulated firms must have a formal complaints handling procedure and give consumers free access to an independent alternative dispute resolution provider.

The RPSA is another recognised body for residential surveyors with its own survey products. Whichever professional you choose, you are protected by standard consumer law. Under the Consumer Rights Act 2015, a service must be carried out with reasonable care and skill.

Services arranged online or by phone normally carry a 14-day cooling-off period. This gives you a right to cancel. However, if you ask for the surveying work to start inside this cooling-off period, you pay for what has been done up to the point you cancel.

Common questions

What is a building surveyor?

A building surveyor is a qualified property professional who assesses the condition and construction of buildings. They look for defects and advise on repair, maintenance or restoration. They also handle party wall disputes and prepare planning applications for extensions.

What does a building surveyor do on a house viewing?

Once your offer is accepted, the surveyor carries out a visual inspection and records the defects they can see. They do not carry out invasive checks, so they will not lift carpets, move furniture or test services.

Can a building surveyor give a property valuation?

An RICS Level 2 survey can be purchased as a survey only or a survey and valuation combined. You must check your quote carefully to ensure a valuation is included if you need one to negotiate the price.

Do I need a building surveyor to remove a wall?

If you want to remove an internal wall, ask a building surveyor to advise. Building surveyors prepare building regulations applications, and a structural engineer may be brought in where beams are involved. Do not take down any wall until you have professional advice.

Next steps for hiring a building surveyor

Follow these steps to find the right surveyor and protect your property purchase or building project:

• Match the survey level to the age, type and condition of the property you are buying.
• Get two or three like-for-like quotes that state the survey level, whether a valuation is included and the expected turnaround time.
• Ask the surveyor about their experience with that specific property type and their knowledge of the local area.
• Check whether the surveyor will talk the report through by phone once you have had time to read it.
• Book the inspection as soon as your offer is accepted and well before you exchange contracts.
• Use the survey findings to get repair quotes, then decide whether to proceed, renegotiate the price or walk away with your conveyancer involved.

Find a surveyor near you

Hiring the right professional early in your property journey will protect your budget and help you avoid serious structural problems. When you are ready to book an inspection, you can find a surveyor near you to compare local quotes and arrange your survey.