RICS Level 3 Building Survey in Welwyn Garden City (AL8)

Our RICS Level 3 Building Survey gives a full examination of every accessible part of the property. We assess the structural integrity of walls, floors, roofs and foundations, then set out any defects, their likely cause and the probable cost of repair. It is aimed at larger, older or non-standard homes, where hidden problems are more likely than in a simpler inspection. Every accessible area is checked methodically, and our findings are backed up with detailed photographs and clear explanations.

Welwyn Garden City’s Garden City heritage shapes a lot of the stock in AL8, and many homes were built using traditional methods, with solid brick walls, timber-framed windows and pitched roofs finished in clay or concrete tiles. Our inspectors know these construction methods well, so they know exactly what to look for in properties that may be sixty to one hundred years old, or older still in some cases. That matters, because age-related wear shows itself in very different ways, and we can separate cosmetic flaws from serious structural concerns.

We also look closely at the services, plumbing, electrical systems, heating and drainage all come under review. Visible wear, safety concerns and compliance with current regulations are all checked where possible. Outbuildings, garages and the general condition of the plot are included too, along with boundary walls and drainage. Where there are extensions or alterations, we pay close attention to the junctions between old and new work, since those areas often reveal damp penetration or a drop in structural integrity.

Environmental risks in AL8 are part of the picture as well, including flood risk from local watercourses and the possibility of ground instability. Our inspectors understand the local geology and how Hertfordshire’s clay soils can affect foundations over time. That local knowledge helps us give a more accurate view of possible issues, along with practical advice on what to keep an eye on later.

• Structural walls and foundations
• Roof structure and covering
• Floor structures and joists
• Windows and doors
• Damp and timber condition
• Services (plumbing, electrics, heating)
• Outbuildings and boundaries
• Environmental risks

Several recurring issues crop up again and again when we inspect homes across Welwyn Garden City. Damp is one of the most common, particularly in solid-walled properties where rising damp or penetrating damp may appear if there is no proper tanking or ventilation. Many AL8 homes are old enough that original damp proof courses have failed, or been bridged over decades of occupation. We use professional moisture meters to gauge the extent of the problem and set out sensible remedial options.

Roofing problems also feature heavily in our AL8 reports. Tiled roofs on period homes may have slipped tiles, degraded mortar or damaged flashings that let water in. Where there are flat roof sections on extensions or garages, we often see ponding, membrane deterioration or inadequate falls that need attention. Much of the housing stock in AL8 is old enough that roof coverings may be nearing the end of their expected lifespan and could need replacing soon.

Timber defects remain a concern too, with woodworm infestation and wet or dry rot still appearing in properties with older timber-framed windows, floor joists or roof structures. Our inspectors probe accessible timber to judge its condition and look for any active infestation that might undermine structural integrity if left untreated. We also check for evidence of past timber treatment and whether previous work was done correctly. In homes with wooden floors, signs of movement or rot can point to something more serious beneath the surface.

Foundation and subsidence concerns matter in AL8 because Hertfordshire’s clay soils can move. During the inspection, we look carefully at walls for cracking that may point to movement, and we assess foundations where they are visible. Historic movement and signs of ongoing activity are both noted. Homes close to mature trees, or on ground that varies more than expected, can be more vulnerable, so we set out clear advice on what to monitor afterwards.

• Rising and penetrating damp
• Roof tile slippage and deterioration
• Failed flat roof coverings
• Timber rot and woodworm
• Cracking to walls (settlement or subsidence)
• Outdated electrical installations
• Aging plumbing and heating systems
• Missing or damaged mortar pointing