A home survey is an independent inspection of a property's condition, carried out by a qualified surveyor and written up in a report for you, the buyer. It is not the same as a mortgage valuation, and it sits apart from the legal work your conveyancer does. A survey is your own check on the building: the roof, the brickwork, the damp, the drains, anything that could cost you money once you own it. For most people a home is the biggest purchase they ever make, and a survey is one of the few real chances to find out what you are taking on before you are committed.
This guide explains how a survey differs from a mortgage valuation, what the RICS Home Survey levels 1, 2 and 3 actually include, how to pick the right one, and what your options are when the report flags a problem. It applies to England and Wales. Scotland works differently, with a Home Report usually prepared by the seller, and Northern Ireland has its own arrangements too.
1 Survey or mortgage valuation
A mortgage valuation is for your lender, not for you. It is a brief check to confirm the property is worth roughly what you are paying and works as security for the loan. Often it is a quick visit, and sometimes only a desktop or drive-by assessment, so it will not tell you whether the roof is failing or the damp-proof course has gone. Many lenders include a basic valuation in the mortgage deal, but treat it as a tick-box for the bank rather than advice on whether the house is sound.
A home survey is commissioned by you and written for you. The surveyor inspects the property and reports on its condition, its defects and the risks, and a more detailed survey explains how serious each issue is and what you might do about it. A valuation answers one question, whether the property is worth enough to lend against. A survey answers a different one, whether the building is in good enough shape for you to buy knowing what you are getting. One is no substitute for the other.
Relying on the lender's mortgage valuation to judge a property's condition is a common and expensive mistake. It is there to protect the bank's money, not to find the defects that will land on your bill after completion.
2 The RICS home survey levels
In England and Wales most surveys follow the RICS Home Survey standard, which sets out three levels. The higher the level, the more detailed the inspection and the report. RICS is the Royal Institution of Chartered Surveyors, the main professional body for surveyors.
Level 1: condition report
A Level 1 survey is the most basic. It gives a simple overview of the property's condition using a traffic-light rating for different elements, and it flags urgent or significant problems and any legal issues to raise with your conveyancer. There is no advice or valuation, and it does not go into detail. It suits newer homes and conventional flats that are clearly in good order, where you mainly want reassurance rather than a deep look.
Level 2: homebuyer survey
A Level 2 survey, often called a homebuyer report, is the popular middle option for standard properties in reasonable condition. Alongside the traffic-light ratings it gives the surveyor's advice on defects, the repairs that may be needed and ongoing maintenance. You can usually pick a version with a market valuation included or one without. For most conventional houses and flats built in the last century or so, a Level 2 strikes a sensible balance of cost and detail.
Level 3: building survey
A Level 3 survey, the full building survey, goes furthest. The surveyor examines the construction and condition in detail, explains the likely cause of defects, and sets out what could happen if they are left, along with a sense of repair priorities. This is the one to choose for older, unusual, large, altered or run-down properties, or anything you plan to extend or renovate. It costs more and takes longer, but it tells you the most.
3 Which survey should you choose?
Choose your survey level by the property's age, type and condition, not just by price. As a rough guide:
- New-build or nearly new and conventional: a Level 1 may be enough, though new homes can still carry snags worth checking. See our guide to buying a new-build home.
- Standard house or flat in reasonable condition (roughly post-1930s, brick built): a Level 2 homebuyer report is the usual sensible choice.
- Older, period, timber-framed, thatched, listed or non-standard construction: a Level 3 building survey is worth the extra cost.
- Anything visibly tired, extended, converted or that you plan to alter: go to Level 3 so you understand the structure before you buy.
- Leasehold flats: match the level to the building's age and condition, and read our guide to leasehold and freehold for the wider issues.
A survey is separate from the legal searches your conveyancer carries out, which look at planning, drainage, the local area and similar matters. The two work together, so see property searches explained for that side. If you are unsure which level fits, a good surveyor will advise once they know the property.
Fees usually rise with the survey level and the property's size and value, so a Level 3 costs more than a Level 1. Always get a quote from the surveyor for the specific property rather than relying on a headline figure.
4 How survey findings can affect your purchase
A survey report can do more than reassure you. If it turns up defects, you have real choices, and acting on them before exchange of contracts is far easier than afterwards. Until you exchange, you can still renegotiate or walk away. Here is the order things usually take once a report lands:
Go through the whole thing, not just the summary. Note anything rated as urgent or serious, and any items the surveyor says need further investigation.
Most surveyors are happy to talk you through the findings. Ask how serious each issue really is and roughly what it might cost to put right.
For anything significant, such as damp, roof problems, movement or wiring, get a quote from a relevant trade or specialist so you know the likely figure.
Some findings have legal angles, such as missing planning permission or boundary questions, that your conveyancer should follow up alongside the survey.
Weigh up whether the issues are manageable, whether you want money off, or whether the property is no longer right for you.
You can ask the seller to reduce the price, fix the problem before completion, or share the cost. If they refuse and the issue is serious, you can withdraw before exchange.
Survey findings are one of the common reasons a sale stalls or collapses, which we cover in why property deals fall through. A clear report and quick, sensible negotiation often keep things on track. Timing matters too. Most people book a survey after their offer is accepted and early in the legal process, so any problems surface while there is still room to act.
A survey is general guidance on a building's condition, not a guarantee and not legal advice. A surveyor cannot see inside walls or under floors, so the report may recommend further specialist checks. Treat it as the best informed view you can reasonably get before you commit, and read it alongside your conveyancer's legal work and your own visits to the property.