The keys may be waiting, the estate agent may be cheerful, and the kitchen may have just the right amount of sage green. But before you commit, you need to know what is happening behind the paint, beneath the floors and above the ceiling. This RICS building survey report explained guide translates the document into plain English, so you can focus on the decisions that matter rather than squinting at technical terms over a cup of coffee.
A RICS Level 3 Building Survey is the most detailed standard survey for a residential property. It is particularly useful for older homes, properties that have been altered, buildings in visibly poor condition, or purchases where you want a fuller understanding of repair risks. The report is not designed to be a dramatic reading experience, although a sentence about widespread damp can certainly raise the pulse. Its job is to give you clear, evidence-based advice before you take on the cost and responsibility of a home.
What a RICS Building Survey Report Is Really Telling You
Think of the report as a structured health check for the property. Your surveyor examines the accessible parts of the building and explains its construction, condition, defects and likely maintenance needs. Unlike a quick viewing, which is mostly about imagining where the sofa will go, a building survey asks whether the roof, walls, drainage and structure are likely to make that sofa an expensive comfort purchase.
A Level 3 Building Survey goes beyond a surface-level overview. It describes significant issues in greater detail, considers the probable causes of defects and sets out the consequences of doing nothing. Where appropriate, it can also offer repair advice, likely timescales and an indication of the issues that need further investigation.
It is not a guarantee that every part of the property is perfect. Surveyors cannot see through walls, lift fitted carpets, dismantle boilers or test electrics unless this has been specifically arranged. A good report is candid about these limits. That is not a loophole – it is useful context about what has and has not been inspected.
How to Read the Condition Ratings
Most RICS Home Survey reports use condition ratings to help you identify priorities quickly. These are not marks for effort. They are a practical way of separating routine upkeep from matters that need your attention.
A condition rating of 3 means the defect is serious and needs repair, replacement or further investigation urgently. It does not always mean the property is unsafe or that you should walk away. It does mean you should understand the likely scope and cost before exchanging contracts.
A rating of 2 identifies defects that need repair or maintenance, but are not considered urgent. This category is common, especially in period homes. Peeling external joinery, aging sealant, localised damp or worn roof coverings can all fall here depending on their extent. Several rating 2 issues can still add up to a substantial bill, so do not treat them as decorative footnotes.
A rating of 1 means no repair is currently needed. It does not mean the element will last forever. Every home needs maintenance, and even a tidy roof will eventually have opinions about the weather.
Some reports may also flag matters for your legal adviser, such as missing building regulation approvals, unclear ownership of shared accessways or evidence of alterations. These are not condition ratings, but they can be just as important to the purchase.
Start with the executive summary
The summary is your best first read. It draws together the defects and risks that deserve prompt action, helping you see the overall picture without hunting through every section. Read it carefully, then go to the relevant pages for the detail behind each point.
Avoid the temptation to count the number of rating 3 items and panic accordingly. One urgent issue might be a straightforward repair to a leaking gutter; another could involve significant roof works. The meaning lies in the description, cause, recommendation and probable consequences, not simply the number in a coloured box.
The Main Sections of a Building Survey
The body of the report usually follows the property from outside to inside, then considers services, grounds and legal matters. It may feel methodical because it is. Houses are less poetic when viewed through a surveyor’s lens, but method is what catches problems early.
Roofs, chimneys and rainwater goods
This section often deserves close attention, particularly in Victorian and Edwardian homes across South East London. The surveyor will comment on the main roof, flat roofs, flashings, chimneys, gutters and downpipes where visible. Broken coverings, poor drainage and defective flashings can allow water into the building fabric, where a modest-looking issue becomes a much less modest repair.
If the report recommends a roof inspection by a competent contractor, that does not automatically mean a complete re-roof is required. It may be needed because areas were inaccessible from ground level or because the surveyor has seen signs that warrant a closer look. Obtain a written quotation and scope of works before deciding how to proceed.
Walls, windows and damp
External walls are assessed for cracking, movement, pointing, render condition and signs of moisture penetration. Not every crack is structural. Old properties move slightly over time, and minor thermal or settlement cracks are common. The key question is whether the cracking is recent, progressive, wide, stepped, associated with distortion, or accompanied by problems with doors and windows.
Damp comments also need context. A surveyor may identify high moisture readings, staining, mould or decayed timber, then explain the likely cause. Often the cause is repairable: bridged damp-proof courses, overflowing gutters, high external ground levels or poor ventilation are repeat offenders. A recommendation for further investigation is sensible where the source cannot be confirmed during a non-invasive inspection.
Floors, ceilings and internal finishes
This part separates cosmetic wear from clues to a deeper problem. Staining on a ceiling may indicate an old leak, an active leak or condensation. Uneven floors might reflect the character of an older house, but they can also point to deterioration in suspended timber floors or historic movement.
Your report should help you distinguish between the charmingly wonky and the genuinely concerning. Ask the surveyor if an issue affects safety, day-to-day use, future saleability or simply your decorating budget. Those are very different categories of inconvenience.
Services and drainage
Surveyors visually inspect accessible parts of electrical, gas, heating, water and drainage installations, but they do not perform specialist testing as part of a standard building survey. If the consumer unit looks dated, the boiler has not been serviced or drainage appears defective, the report may recommend checks by appropriately qualified specialists.
Treat these recommendations as part of your due diligence, not as a sales tactic for extra reports. A current electrical installation condition report, gas safety check, boiler service record or CCTV drainage survey can turn uncertainty into a costed decision.
What to Do When the Report Finds Defects
The most useful report is one that changes what you do next. Once you have read the summary and relevant sections, group the findings into three practical questions: what must be dealt with before you buy, what needs budgeting for soon after completion, and what can be managed through ordinary maintenance.
For serious or unclear defects, ask for specialist quotations before exchange where time allows. Make sure contractors quote against the actual problem described, rather than offering a vague and heroic-sounding package of works. Two written quotations can reveal whether a repair is relatively contained or likely to run into the tens of thousands.
You can then decide whether to renegotiate the price, ask the seller to resolve a specific issue, adjust your budget or proceed with full knowledge of the work ahead. There is no universal rule. A sound period house with an ageing roof may still be a good purchase at the right price. A recently refurbished flat with unexplained cracking and missing paperwork may need more caution, despite the photogenic pendant lights.
Share relevant sections with your solicitor too. They can investigate planning permissions, listed building consent, building regulations approval, guarantees, party wall matters and other legal points raised in the report. Physical condition and legal compliance are separate tracks, but both can affect your future costs and options.
Questions Worth Asking Your Surveyor
A survey report should not be the end of the conversation. It is reasonable to ask your surveyor which findings are most material, whether any defect is likely to worsen quickly, and what should be investigated before you are legally committed. You might also ask whether the property appears fairly priced once the recommended repairs are considered.
Keep your questions specific. “Should I be worried?” is understandable but broad. “Does the roof defect appear localised, and would you seek quotations before exchange?” will get you closer to a useful answer. A clear post-survey conversation is especially valuable if you are weighing up an older home, an extension, or a property that has had enthusiastic DIY attention.
A building survey is not there to make the decision for you. It gives you the facts, priorities and professional perspective to make that decision with your eyes open. The right property does not have to be flawless. It simply needs to be one whose flaws you understand, can afford and are prepared to live with – preferably before the removal van is booked.