West London borough with high-value period conversions where quality finishing work — tiling, plastering, decorating — matters most. Hammersmith and Fulham falls well within the West London ground Lian Construction covers on a regular basis. For diagnosing and treating rising damp, penetrating damp, condensation and basement tanking issues in Hammersmith and Fulham, that local knowledge means fewer surprises once work is on site and a team that already understands the borough's typical property stock.
Hammersmith and Fulham's housing stock is dominated by the kind of period property found across much of inner and West London: Victorian and Edwardian terraces and villas, many of which have been split into flats over the decades, alongside mansion blocks and some purpose-built conversions from the early to mid-20th century. A significant share of the borough's homes are conversions rather than single-family houses, which is typical of high-value West London areas where large period houses have been reworked into two, three or more flats to meet demand. This conversion history means a lot of the existing stock carries older wall and floor build-ups, original plasterwork in varying condition, and layouts that have been altered more than once. As with other West London boroughs, there's also a mix of ex-local authority blocks and post-war infill alongside the period stock. Because so much of the housing is period conversion rather than new-build, quality of finish tends to matter more here than in areas with a higher proportion of modern construction, since old walls, ceilings and floors need careful preparation before tiling, plastering or decorating will look right and last.
In a borough where so much of the property is high-value period conversion, the finishing trades carry more weight than they might elsewhere. A flat carved out of a Victorian terrace lives or dies on how well the plaster, tiling and decorating are done, since buyers and tenants at this end of the market notice uneven walls, poor tile lines or rough paintwork more readily than they would in a standard new-build. That creates steady demand for contractors who can do finishing work properly rather than just quickly, particularly on bathroom and kitchen refits where tiling quality is hard to hide. It also means homeowners and landlords doing up a conversion flat are often better served focusing budget on getting the finishing right rather than cutting corners to save on the last stage of a project. For landlords specifically, a well-finished conversion tends to let faster and at a better rent in this kind of market, so the extra cost of proper plastering and tiling work is usually recovered over time. Given the age and variability of the underlying building fabric, it's also worth budgeting some contingency for making good old walls and floors before the visible finishing work even starts.
Given how much of Hammersmith and Fulham's housing stock is period conversion, it's worth being aware that conservation area and listed building rules are common across this type of West London property, as they are in many inner London boroughs. Converting or altering a period house can trigger planning or listed building consent requirements depending on the specific property and area, particularly for external changes, window replacements or work affecting original features. Internal finishing work like plastering, tiling and decorating is generally more straightforward from a planning perspective, but if it's part of a wider conversion or alteration project it's sensible to check the property's status with the council before starting. As with any older building, it's also worth confirming what internal fabric might be original or protected before stripping back walls, since this can affect both the approach and the cost of the finishing work.
How We Sequence a Damp Job Alongside Other Trades
A damp job rarely stays inside one trade, and having a single contractor coordinate it tends to work out better than a homeowner managing a damp specialist, a plasterer, a scaffolder and a party wall surveyor separately with nobody owning the whole picture. External work - repointing, flashing renewal, gutter clearance, render repair - happens before internal redecoration, because an internal-only fix on a wall still being penetrated from outside will fail again no matter how carefully the injection was carried out. Where scaffold is needed for elevation work, it goes up before external repairs start and stays until any re-rendering has cured enough to come down safely. Sub-floor ventilation work - clearing or reinstating airbricks under a suspended timber ground floor - typically happens early too, since blocked airbricks are often part of the cause and joists take time to recover once ventilation is restored. Internal hack-off and DPC injection follows, then the drying period, then re-plastering with a salt-retardant or lime-based system where hygroscopic salts are present, and only once that's fully dried do we bring in final decoration. Where the job touches structural elements - underpinning, a basement conversion, new sub-floor ventilation requiring floor removal - we coordinate the Building Control route, full plans or building notice depending on scope, and bring in a structural engineer at the point the design is fixed rather than after work has already started.
Basements and Semi-Basement Conversions: Hydrostatic Pressure, Not Rising Damp
Basements and semi-basement flats, common across conversions in Kensington, Islington and Camden among other boroughs, face a damp mechanism that has nothing to do with capillary rise or airborne moisture: hydrostatic pressure from groundwater pushing against an earth-retaining wall below ground level, constantly and from every side. A badly detailed cementitious tanking system applied over an active water source without a sump and pump in place doesn't stop that pressure - it gets pushed off the wall over time, or the water finds the weakest point instead, often the junction between the tanked wall and the floor slab, where it forces its way in sideways. A proper tanking specification accounts for where the water is coming from and how much of it there is, which is why a sump and pump is often part of the system rather than an optional extra, particularly where the water table is high or a nearby watercourse affects groundwater levels. This is priced by the square metre - roughly £90 to £220 depending on whether it's a cementitious slurry or a studded membrane system - and for a full cellar or basement room in London that typically lands somewhere between £4,000 and £14,000 once labour, materials, sump and pump where needed, and finishing are all included. Where a basement is being converted into habitable space rather than just tanked as storage, Building Control involvement is close to unavoidable, since means of escape, ceiling height and ventilation all come into play alongside the waterproofing itself.