RICS Chartered Surveyors in Pontefract

The Magnesian Limestone ridge, above ground and below it

The Magnesian Limestone forms a narrow band running north out of Nottinghamshire through South and West Yorkshire and on towards the Tees, and Pontefract sits squarely on it. Stone was quarried all along that band, and the best of it was good enough to face buildings of national importance, which tells you something about the material the town was built from. Locally it gives a warm cream and honey coloured stone that looks entirely unlike anything you find west of the Calder.

It also decays in its own particular way. Dolomitic limestone frequently forms a hard outer crust while the stone behind that crust softens, so an elevation can look sound from the pavement while a section of it is ready to come away in the hand. Once water gets past the face, the stone loses its grain and crumbles to powder at the joints, and salts from a cement mortar or a modern render accelerate the process rather than slowing it. The repair is not difficult but it has to be the right one: a lime mortar matched to the stone, cut indents of similar material where a block has failed, and an end to whatever was letting the water in. Where a previous owner has repointed a frontage in cement or painted it with a masonry coating, the report explains what that is doing and what undoing it involves.

Below ground the limestone asks a different question. It is soluble, slowly, in groundwater that is even mildly acidic, and over a very long period that produces solution features: widened joints, cavities, sediment filled pipes running down into the rock and, at the surface, the occasional swallow hole where soil above a void washes into it. Most property in the town stands on perfectly competent rock and has done so without incident for two centuries. The point is that rockhead here is irregular in a way a uniform clay site is not, so foundations on one side of a house can bear on solid limestone while the other side bears on material that has filled an old solution feature, and that is a recipe for slow differential movement.

Three practical consequences follow for a buyer. Concentrated water is the enemy, so a leaking drain, an overflowing gully or a soakaway discharging into fissured rock can quietly enlarge a void beneath a building, and the inspection pays close attention to drainage and to where rainwater actually ends up. Old quarry ground is common around the town and quarries were routinely backfilled with whatever was to hand, so a flat plot can conceal several metres of uncontrolled fill. And where a building shows distortion the fabric cannot explain, a proper ground investigation rather than an educated guess is what settles the matter.

West of the town the ground changes character. The Coal Measures dip away beneath the limestone and the ground under Featherstone, Glasshoughton and the western fringe of Knottingley was mined, with Prince of Wales Colliery working until the early 2000s. For a property on that side, a Coal Authority mining report belongs in the search pack. For a house on the ridge itself, the limestone is the story, and treating the two situations as though they were the same is the mistake we most often have to correct.

What a Level 3 Building Survey covers in a Georgian market town

A Level 3 Building Survey is the most detailed inspection available and the difference from a Level 2 is one of depth rather than tone. The surveyor opens up nothing and lifts no fitted floor coverings, but everything reasonably accessible is examined and described: the roof space and its structure, the covering from ground level and from any safe vantage point, every elevation, the cellar, the visible services, the joinery, the floors, the boundaries and the outbuildings. Each defect is given a stated cause, a view on urgency and an indication of what putting it right involves.

On a Georgian townhouse in the centre of Pontefract that produces a long list of items a shorter inspection would step past. Parapet and valley gutters concealed behind the front elevation are a recurring one. They are usually lead lined, often patched in bitumen and very frequently the source of the damp staining that shows up in the top floor rooms. Chimney stacks on these houses are tall, exposed and commonly redundant, and a flue capped with no ventilation left in it will sweat. Lath and plaster ceilings lose their key and bow. Original sash boxes rot at the cill and the bottom rail before anywhere else. Timber bressummers over inserted Victorian shopfronts carry the entire front wall above them and are almost never looked at by anyone.

The town centre also holds a large stock of upper floors converted into flats and offices over the years, some of it done well and some of it done in an afternoon. Fire separation between a commercial ground floor and the residential floors above is the first thing to establish, then the means of escape, then whether the work ever had building regulation approval. Where a room bridges a passage or a yard entry, which happens repeatedly in a market town built around ginnels and courts, you may be buying a flying freehold, and that needs your solicitor's attention as well as ours because it governs who can compel whom to repair.

Listed buildings need particular care. There are a considerable number in and around the Market Place, and alterations to them require consent whether or not a previous owner troubled to obtain it. An unauthorised replacement window or a removed chimney breast becomes the next owner's liability, so where we see work that looks as though it should have been consented, the report raises it for enquiry before exchange rather than leaving it to surface years later when you come to sell.

Defects we see most in Pontefract homes

Some faults here belong to the building stone and the ground, others to the age of the stock. These recur often enough that we go looking for them by default.

• Face decay and powdering of dolomitic limestone behind a hard weathered crust, worst on elevations pointed in cement or sealed with a masonry coating.
• Damp staining to top floor rooms traced back to lead lined parapet and valley gutters that have been patched with bitumen instead of relined.
• Distortion and cracking on plots that sit partly on solid rock and partly on fill occupying an old quarry or a solution feature.
• Drainage defects that carry more weight than usual, because water escaping into fissured limestone does not simply soak away harmlessly.
• Bowed lath and plaster ceilings, and floor joists split or notched where services have been threaded through the structure of a Georgian house.
• Decayed bressummers and inadequate permanent support above shopfronts inserted into older buildings around the Market Place and Beastfair.
• Flats and offices formed in upper floors with no fire separation from the commercial use beneath and no building regulation paperwork to produce.
• Corroded wall ties and cracked render on inter-war and post-war housing along the Carleton, Ackworth and Darrington roads.

Buying in Pontefract: consents, timing and access

Pontefract draws buyers from further afield than it once did. The A1 and the M62 are minutes away and the stations put Leeds and York within an easy commute, so competition for the better Georgian houses and for family property at Carleton, Ackworth and Darrington is real. Instruct the survey when your offer is accepted rather than when the searches come back, because a Level 3 takes longer on site and longer to write than a Level 2, and it is the report most likely to change what you do next.

Access has to be arranged properly for a Level 3 to be worth what you pay for it. We ask for the loft hatch unlocked and clear of stored belongings, the cellar lit and open, outbuildings and garages unlocked and, in a town centre property, agreement for the surveyor to view the rear from the yard or the passage rather than only from the street. Where the house is tenanted or the seller has already moved out, that takes a few days to organise, so tell us early and we will start it moving.

Much of the historic centre lies within a conservation area, and the practical effect is on what you are free to change: windows, doors, roof coverings, boundary walls and anything else visible from the street. The report records the designation and its consequences. It also records the reverse situation, which arises more often than people expect, where a previous owner has already made a change that needed consent and never applied for it.

If the inspection turns up something needing specialist attention, we take it further ourselves. Suspected ground movement leads to a structural engineer's report, decay at low level to a timber and damp report, and a roof nobody can see properly to a drone survey. You are not handed a list of worries and left to find four different firms, and you can telephone the surveyor who wrote the report and talk it through before deciding anything.

Other surveys and valuations around Pontefract

Besides Level 3 work we carry out Level 2 Homebuyer Surveys on the town's conventional post-war and modern housing, structural engineer's reports where movement is suspected, timber and damp reports, boundary wall dispute reports, drone roof surveys, EPCs and asbestos surveys. On the valuation side we prepare probate valuations, matrimonial valuations, Help to Buy valuations, building insurance valuations for reinstatement cover, and private valuations where somebody simply needs an independent figure they can rely on.

The same coverage extends across this part of the district, so Castleford, Knottingley, Featherstone, Ackworth and Darrington are all served by the same team at the same agreed fee, with nothing added for travel. Commercially we handle building surveys on shops, offices and industrial units, schedules of condition at the start of a lease, dilapidations advice at the end of one, rent reviews and commercial valuations. If you are not sure which report answers your question, describe the property and the problem on the telephone and we will tell you which one fits.