Here's our guide to decking in Harrowgate Hill: the homes and gardens, the clay underneath, planning, and what goes into the price.
Who lives here and what the gardens are like
Harrowgate Hill ward is mostly semi-detached. The 2021 Census counted 55.2% of homes as semi-detached, with detached and terraced houses at 21.7% each. Most households own their home (77.9%), split almost evenly between those who own outright (40.7%) and those with a mortgage (37.3%).
The street names are a talking point. One cluster is named after England cricketers: Statham Place, Botham Grove, Trueman Grove, Hendren Close, Warner Grove and Verity Rise. Another takes its names from Cornwall, including Newlyn Drive, Bodmin Grove, Marazion Drive, Penryn Close, Falmouth Drive, Helston Close and Polperro Grove. Longfield Academy and Harrowgate Hill Primary School serve the area, and Drinkfield Marsh Nature Reserve, Bensham Park and North Park are close by.
Many gardens behind the semis and detached homes follow a familiar pattern: a patio or path by the house, a lawn and a fence. For a young family, a deck can be the most-used part of the garden, a clean, dry floor for toys, meals and sitting out. For older homeowners, it can replace a lawn or a patio that has become hard work.
Soil and drainage in Harrowgate Hill
The British Geological Survey's 1:50,000 map shows Devensian till (boulder clay) over dolostone of the Permian Ford Formation here. Till is dense and holds water near the surface after rain, but it gives firm support once you dig through the topsoil.
Our approach on clay: post holes down to firm, undisturbed till, posts set in concrete, and the ground under the deck shaped so it falls slightly away from the house. A weed membrane and a layer of gravel stop weeds and keep water moving. The frame sits clear of the ground with space for air at the edges, which keeps the joists dry.
The Environment Agency's Flood Map for Planning shows no land in Flood Zones 2 or 3 within 300 metres of the centre of Harrowgate Hill. Gardens beside the nature reserve or any drainage channel can still be soft underfoot in winter, which we'll check at the visit.
Rules and permissions in Harrowgate Hill
planning.data.gov.uk shows no conservation area over the estates of Harrowgate Hill. The nearest, the Stockton and Darlington Railway: Northgate Conservation Area (1974), lies closer to the town centre. Listed buildings nearby include Honey Pot House and a group of cemetery buildings: the chapels and porte-cochère, the lodge with its gates and walls, the keeper's house and a commemorative column (all Grade II).
So, for most homes, the Planning Portal's national rules apply. A deck is normally permitted development if it's no more than 30cm above the ground and, together with other extensions and outbuildings, covers no more than half the garden. Higher decks need planning permission, and flats and maisonettes need permission for any deck.
On newer streets, the original planning permission sometimes removed permitted development rights. Your deeds or Darlington Borough Council's planning records will show this, and we'll ask about it.
Ideas for a Harrowgate Hill deck
A low deck outside the patio doors, with boards running across the house and a broad step down, suits most semis. Add a built-in bench along the fence and the deck becomes a seating area without loose furniture. If the garden falls away, a two-level design can keep the top level within the 30cm limit and still give level space further out.
For families with young children, composite boards are splinter-free and need no staining; for a natural look, grooved hardwood is hard-wearing. See composite decking and timber decking, or our page on raised decking.
What affects the cost
Each deck is priced after a visit. The things that change it are the size, height, board, the number of steps, any balustrade or lighting, and the work needed to clear the area first. On till, footings are usually straightforward. Our decking costs guide goes into more detail.
Close by
- Haughton-le-Skerne: to the south-east, with its village green and Grade I church.
- Cockerton: to the south-west, the old village with two becks.
- Heighington: out to the north-west, a village with two greens.
Every place we cover is on the areas page.
Questions from parents in Harrowgate Hill
What's the safest deck for toddlers?
A low deck with a single shallow step, splinter-free composite or grooved hardwood boards, and no gaps big enough to trap small fingers or toys. If any edge is high enough, we add a balustrade children can't climb.
Do we need planning permission?
Usually not for a low rear deck. We'll check whether your home had permitted development rights removed when it was built.
Can you build around a trampoline area or play space?
Yes. We can shape the deck to leave a lawn for play, or build a step-down edge that doubles as seating.
How do you stop water pooling under a deck on clay?
The ground under the deck is graded with a slight fall, covered with a membrane and gravel, and the frame sits clear of the soil.
Sources: ONS Census 2021 TS044, TS045 and TS054, Harrowgate Hill ward (Nomis); BGS Geology Viewer 1:50,000; planning.data.gov.uk: conservation areas and listed buildings; Environment Agency Flood Map for Planning; OpenStreetMap; Planning Portal: decking.