Grading near you

Section 55(1) of the Town and Country Planning Act 1990 defines development as the carrying out of building, engineering, mining or other operations in, on, over or under land, or the making of any material change in the use of any buildings or other land. Earthworks are capable of being engineering operations, so significant regrading — importing large volumes of fill, raising a garden materially, cutting into a slope, or reshaping ground in a way that changes the look of the site from outside — sits within the scope of that definition rather than outside it.

The exclusion people reach for does not do the work they expect. Section 55(2) lists what is not development, and its curtilage limb concerns the use of buildings or other land within the curtilage of a dwellinghouse for any purpose incidental to the enjoyment of the dwellinghouse. That is about use, not about operations, so it does not convert a substantial earthworks job into something outside the planning system. The other limb commonly cited covers works affecting only the interior of a building, which plainly has nothing to say about a garden.

In practice, ordinary levelling for a lawn or a patio in a back garden is not something local planning authorities pursue, and most grading work needs no application at all. The cases that do arise tend to share features: a visible change in ground level at a boundary, fill brought in by the lorry-load, a slope terraced into something that reads as engineering from the street, or a site with conditions attached to an earlier permission. The cheap step is a call to the local planning authority describing what is proposed, made before the machine is booked. Scotland and Northern Ireland have their own planning Acts with their own definitions, so ask locally rather than assuming the English provision applies.

Regrading changes drainage whether or not that was the intention, and the moment water leaves your boundary in a way it did not before, the job has acquired a second party. GOV.UK's guidance for watercourse owners is a useful statement of the principle: an owner must let water flow naturally, must not pollute it, and is responsible for obtaining any permissions needed for work in or around a watercourse. Where a regrade discharges into a ditch or affects the flow of an ordinary watercourse, section 23 of the Land Drainage Act 1991 brings the drainage board or lead local flood authority into it.

Even where no watercourse is involved, the neighbourly version of the same problem is common and expensive. Raising the level of a garden against a shared boundary sends surface water the other way, loads a boundary wall or fence that was never built as a retaining structure, and produces a dispute in which the person who moved the earth is on the back foot. The workable approach is to design the falls so the new grade drains within your own land, to build a proper retaining structure wherever a level change is being held, and to talk to the neighbour before rather than after.

There is one detail against the house worth keeping in view. Approved Document C's technical solution expects a margin of at least 150mm between the adjoining ground and the damp-proof course of an external wall, so a regrade that lifts the finished level to meet a threshold can defeat a detail the building relies on. Where the new level has to come up close to the wall, the answer is a drained margin rather than simply filling to the door.

Settlement is the classic grading defect, and it is a compaction failure rather than a material failure. Fill placed too deep in one go, or placed wet, consolidates over the following year and leaves a hollow exactly where the ground was built up, which is usually the part of the garden that was lowest to begin with. It shows as a dip in a lawn, a paving slab that has dropped at one corner, or a path that has developed a pond. Fixing it means lifting the surface and doing the fill properly, which is why the compaction regime is worth asking about before the work rather than inspecting afterwards.

Ponding is the other, and it is a falls problem. A surface laid to a level rather than to a fall will hold water somewhere, and in Britain that somewhere will be wet for most of the winter. The related failure is a fall that runs the wrong way, directing water towards the house or towards a boundary, which is worse than no fall at all.

The expensive surprise is retaining. A slope that is terraced into levels has to hold those levels, and the moment a change in level exceeds what soil will stand at its natural angle, a structure is needed — designed, founded and drained behind, not a decorative edging. Many grading quotations are cheap because they have priced moving the earth and not holding it. Ask specifically how each level change is being retained and what is behind it, because that answer is where the difference between two quotations usually sits.

Volume and access govern the price. The variables are how much material has to be moved and whether cut and fill can be balanced on site, how much surplus has to be carted away, whether material has to be imported and to what specification, what size of machine can physically reach the garden, how much of the work has to be done by hand because it cannot, whether any level change needs a retaining structure, and how much reinstatement follows. A garden reachable only through a house is a different economic proposition from one with a side gate a machine can drive through.

LokalMatch does the introductions so you can compare those assumptions side by side. Describe the ground once with your postcode — the level change involved, what the garden is for afterwards, how a machine would get in and whether anything is already buried — and groundworkers and landscapers covering your area get in touch. Homeowners pay nothing to use it and the professionals pay for the requests they receive. LokalMatch moves no earth, sets no prices and does not vet, rank or recommend anyone who replies, so asking how each quotation handles compaction, retaining and surplus spoil is the part that stays with you.