Teesside property development FAQs

£1,900 to £2,600 per square metre single storey and £1,700 to £2,300 two storey, so a 20m² rear extension is typically £38,000 to £52,000 including finishes but excluding kitchen units.

Yes. The property is measured, the work is set out in writing element by element, and you take your time deciding.

Because they price different specifications. Glazing type, foundation assumptions, who supplies the kitchen and whether making good the existing rooms is included can move a total by twenty thousand pounds without either quote being dishonest.

Drawings, structural calculations, planning or lawful development fees and building control, adding roughly 8 to 12 per cent. Party wall costs and a build-over agreement apply on some sites.

Ten per cent on a modern property and nearer fifteen on anything pre-1950, where foundations, drainage and hidden condition are less predictable until work opens up.

Often not. Many single-storey extensions and nearly all loft and garage conversions fall within permitted development. Two-storey work, conservation areas, flats and houses with rights removed by condition are the common exceptions.

Completely separate, and it applies whether or not planning is needed. It covers structure, insulation, ventilation, fire safety and drainage, and the completion certificate is what protects the value of the work.

A formal confirmation that permitted development work was lawful. It costs about half a planning fee and is the document a buyer's solicitor asks for years later.

Eight weeks statutory for a householder application, though validation and consultation usually stretch it. Plan on three to five months from first drawings to starting on site where an application is involved.

Where work affects a shared wall or excavates near their foundations, a party wall notice is served in advance. Written consent costs nothing; a formal award costs £900 to £2,000 per adjoining owner.

Measure from the ceiling joists to the ridge. Around 2.4m is comfortable and 2.2m usually workable. Trussed roofs on post-1970 estate houses convert but cost more because the trusses must be replaced with a new structural floor.

A loft is cheaper, keeps the garden and rarely needs planning, but only delivers upstairs space. An extension solves a cramped ground floor at the same time. If the kitchen is the problem, extend; if it is bedrooms, look up.

Yes, roughly half the per-square-metre cost, because the walls and roof already exist. The savings only hold if the floor build-up, damp membrane and insulation are done properly rather than skipped.

Frequently the better value move. Removing a load-bearing wall costs £3,500 to £9,000 and often delivers more usable space than adding floor area, because it removes circulation and dead corners.

Usually yes for extensions, lofts and garage conversions. A full rewire and replumb refurbishment is far quicker with the property empty, and most people move out for six to ten weeks.

Around 900mm to 1.2m in typical local clay, rising to 1.5m to 2.5m or a piled solution near mature trees or on made ground. Building control sets the depth once the trench is open, which is why an honest quote uses a provisional sum with a rate.

Consent from Northumbrian Water to build over or within three metres of a public sewer. Older terraced streets across Middlesbrough, Stockton, Redcar and Hartlepool frequently have combined sewers in the back yard, so it comes up often.

Generally yes. Solid nine-inch walls, shallow rubble footings, lath and plaster, and services installed over a century of piecemeal alterations all add labour compared with a 1990s estate house.

Middlesbrough, Stockton-on-Tees, Redcar and Cleveland or Hartlepool, depending on address. Their local plans differ on backland development, parking and separation distances, so a scheme approved on one side of a boundary is not automatically acceptable on the other.

Adding a fourth bedroom, a second bathroom or a proper family kitchen-diner is reliably worth it on most local stock. The limit is the street ceiling price, and that is worth checking before committing to a large scheme.