Decking in Yarm

Specification tends to sit at the top end

Yarm gardens more often than not get the better half of the price range, and for good reasons rather than snobbery: larger plots that want a design rather than a rectangle, houses where a moulded budget board would look wrong against brick and stone, and views worth keeping. Hardwood decking and capped composite are the usual choices, with glass or stainless wire balustrade where a river or garden view is the point of the deck.

How Yarm compares across Teesside

The 2021 Census counts 56% of Yarm households in detached homes, more than in most of the towns we cover. Bigger gardens mean more multi-zone designs than in Thornaby, where a single deck off the back door is the usual job.

The British Geological Survey maps river alluvium beside the Tees, and the Environment Agency shows Flood Zone 2 and 3 land there. Most of Eaglescliffe, across the river, sits on higher glacial till. For riverside decks we use open designs that can be washed down if water reaches them.

Riverside plots and the flood question

Gardens running down toward the Tees behind the High Street and along the riverside sit on ground that has flooded historically and that stays saturated for long spells. Decking copes with that better than paving because it sits above the ground rather than on it, but the frame has to be designed for the conditions: posts on footings taken down to bearing ground, everything raised clear with real airflow, joists taped, and no timber left touching wet soil. It is also worth designing so that a deck can be inspected and washed down afterwards rather than becoming a sealed box that traps silt.

Period property, conservation area detail

Parts of Yarm are within a conservation area and the High Street carries listed buildings, so anything visible from the street, and raised decks in particular, needs checking with Stockton-on-Tees Borough Council before the design is settled, and we do that first. In practice most work is behind the house and straightforward, but the detailing still matters on period properties: simpler balustrade profiles, hardwood or dark composite rather than pale grey, and a threshold that meets old brickwork cleanly.

Large modern gardens

Out on the newer developments toward Kirklevington and the edges of town, plots are big and flat, which opens up multi-zone designs: a dining deck at the house, a path or lawn, then a separate seating deck with a pergola further out. Material comparison is in composite versus timber, and prices in the cost guide.

Yarm planning, conservation and flooding

Planning Portal guidance says decking is normally permitted development if no part of it is more than 30cm above the ground and, together with extensions and outbuildings, it covers no more than half the garden. Above that height, it needs planning permission. Flats and maisonettes don't have these rights at all. Riverside gardens that fall towards the water often push a deck over 30cm at the far end, so we check levels at the survey.

The Yarm conservation area covers the High Street and the old town, where many buildings are listed. Raised decks and anything visible from the street need checking before design, and works within the curtilage of a listed building can need listed building consent. Most tree work in the conservation area needs six weeks' notice. Check the Environment Agency flood map for your address before raising levels near the river.

Sources: Planning Portal: decking; Planning Data (GOV.UK): Yarm conservation area; Environment Agency: Flood Map for Planning; GOV.UK: tree preservation orders and trees in conservation areas; ONS Census 2021, TS044 accommodation type (Nomis); British Geological Survey: Geology Viewer. Checked October 2026.