RICS Level 3 Building Survey in Lisburn

Our Level 3 survey is the most detailed RICS report we provide on a conventional purchase. It is a visual inspection of all accessible parts of the building, so our surveyors can comment on construction, materials, defects, repairs needed, and the order in which issues should be dealt with. In Lisburn, that means looking closely at roofs, chimneys, external walls, floors, ceilings, lofts, rainwater goods, joinery and the visible signs of movement that can show up in an older house in BT27 or in a later extension off Glenavy Road. The report also explains the consequences of leaving a defect alone, because a loose slate or a stained ceiling is not just cosmetic if water has already reached the timbers beneath.

We do not open up the fabric of the building, lift carpets, carry out drainage CCTV, or test the services. Those are specialist follow-ups, and we say so plainly when the evidence points that way. If the surveyor sees a crack that needs monitoring, rot near a roof junction, or signs of damp around a bay window, the report will tell you why it matters and what type of specialist may need to step in. That is useful in Lisburn, where a buyer might be weighing up a house in a mature street against a newer home, and the wrong assumption can cost time and money after the offer has already been accepted.

Lisburn property filters commonly include Pre 1919, 1920 to 1945, 1946 to 1965, 1966 to 1990 and Post 1990, which tells you the local stock is mixed rather than uniform. A Level 3 report fits that sort of market because it follows the building in front of us, not a template. When a home has been extended, altered or patched up over time, our surveyors look at the original structure and the later work together, so the advice is based on how the whole house behaves, not just on one tidy room.

• Roof coverings and flashings
• External walls, render and pointing
• Loft, sub-floor and visible timbers
• Repair priorities and likely consequences

What it does show is a mixed market, with an average asking price of £151,950 on home.co.uk in May 2026, sold price data of £233,000 for January to March 2026 on homedata.co.uk, and property filters that run from Pre 1919 through to Post 1990. That mix usually means a surveyor may be dealing with an older terrace, a mid-century semi with later additions, or a newer home that has already been altered.

In houses of that sort, the common trouble spots are familiar. Roof coverings age, flashings fail, gutters overflow, and water finds the weakest joint. Solid walls can show damp near the base, timber can decay where rainwater has been left to spill, and cracks can open where a later extension was tied into the original house without enough care. Around Lisburn, that matters especially where the buyer is looking at a property that has been patched, extended or rearranged over time, because a neat finish can hide a weak junction for a long while.

This varies street to street, so we go on your exact address rather than a town-wide average. Instead, we read the building that is actually in front of us. If there is movement in a wall, staining near a loft hatch, or damp in a hall off the main stairs, the report explains the next step and points you towards the right specialist. That approach is what makes a Level 3 useful on a house in BT28, where age and alteration history matter more than a generic description.

• Pre 1919 terraces
• Mid-century semis with extensions
• Roof and chimney defects
• Damp, decay and patch repair history