Three eras of housing, and what each one hides
Building work across Teesside sorts into three housing eras, and the era decides where the money and the surprises sit. The Victorian and Edwardian terraces of Linthorpe, Ayresome, Oxbridge and the Saltburn jewel streets have solid walls, lath and plaster, and a century and a half of alteration nobody wrote down. The inter-war and post-war stock across Acklam, Billingham and Thornaby was built to a handful of repeating house types, so opening up one of them tells you a good deal about the next. The estate housing at Coulby Newham, Hemlington and Ingleby Barwick is new enough to be predictable and old enough that its first kitchens, garages and layouts no longer suit the people living in them.
We work across the whole conurbation from a base in Middlesbrough TS3. The search that brings most people to this page is builders Teesside, and it returns plenty of firms who will all take the job on. The difference between them shows up in whether the quote survives contact with the house. Six jobs make up most of what we do.
| Job | What it actually involves | What moves the price |
|---|---|---|
| Single-storey extension | Foundations, drainage, shell, roof, glazing, fit-out | Ground conditions, where the drains run, whether the roof line works |
| Loft conversion | Floor structure, stairs, dormer or rooflights, insulation, escape route | Roof type, head height, where the stairs can land |
| Garage conversion | Infill wall, raised insulated floor, damp proofing, services in | Floor level difference, how far heating and power must travel |
| Structural opening | Engineer's calculation, temporary support, beam, padstones, making good | Span, what the wall carries, access to get a beam in |
| Damp and rot repair | Finding the source, then repairing cause and damage | How long it has been wet, whether structural timber is involved |
| Whole-house renovation | Rewire, replumb, replaster, joinery, decoration | Whether the house is empty, how much is coming out |
None of these can honestly be priced from a description down the phone, which is why each of them starts with somebody standing in the room.
Structural openings and the beam above them
A structural opening is where building work stops being cosmetic. Take the wall out between the kitchen and dining room of a 1930s semi and something else must carry what that wall carried, and the size of that something is calculated by a structural engineer rather than guessed at on site. The calculation goes to building control, and it specifies the beam and the padstones its ends bear onto.
The risky part is not the finished beam. It is the hour the wall is gone and the load sits on temporary support, which is why propping and needling are planned in advance rather than improvised on the morning.
Two things get forgotten on nearly every knock-through. The first is the neighbour: if the wall is shared, and in a terrace or semi it very often is, the Party Wall etc. Act 1996 may require formal written notice with a waiting period attached, and that period runs whether or not your skip has arrived. The second is services. A wall that disappears takes a radiator and a couple of sockets with it. Our electricians and plumbers are the same firm, so the replacement circuit and pipe runs get sequenced rather than negotiated.
Extensions, lofts and garages
The cheapest square metre you can add to a Teesside house is usually one you already own. A garage or a loft comes with foundations, walls and a roof already paid for; an extension buys all three before it delivers a usable metre of floor.
Garage conversions suit the estate housing here particularly well, because those garages were sized for narrower cars and now hold bikes, boxes and a freezer. The work is an infill wall, a floor raised and insulated up to the level of the house, damp proofing, and heating and power extended into a room that never had either. Our guide to garage conversion costs sets out what that contains.
Lofts turn on head height and on what the roof is made of. A cut roof in an older Linthorpe or Norton property is usually straightforward to work within. A trussed roof on newer estate housing has to be restructured before it can carry a floor, and that difference belongs in the quote rather than in the second month. Stairs are the other constraint, and where they land decides more layouts than people expect. There is more on the Ingleby Barwick page.
Extensions vary most by where you are. Around Middlesbrough the questions are drainage and boundary distances. In Yarm the conservation area and the Tees loop can decide a design before anyone draws it, and in Hartlepool the Headland restricts work that is permitted development a mile inland.
Damp and rot, which are different problems
Damp is a symptom and rot is a consequence, so both start with finding out where the water is coming from. A treatment aimed at the wrong cause fails quietly over a few years and takes the redecoration with it.
There are three usual sources. Condensation is much the commonest and is a ventilation and heating problem rather than a building fault. Penetrating damp comes through the fabric, and on the coast at Redcar, Marske, Saltburn and Seaton Carew salt-laden wind drives it harder into the seaward elevation, so pointing, render and sealant work harder there than inland. Rising damp exists but is over-diagnosed, and before anyone injects anything it is worth checking whether ground levels have crept up the wall, a cavity is bridged, or a patio has buried an airbrick.
Rot follows water. Wet rot stays local. Dry rot travels through masonry and needs the moisture source removed before treatment is worth paying for. The places we find it are consistent: joist ends built into solid walls, the floor under a bathroom that leaked quietly for years, timber behind a lean-to added over an airbrick.
Building control, and the certificate that matters years later
Building regulations approval is the part of the job that keeps mattering long after the dust has gone. A building control body checks the work at set stages, and in England there are two routes to choose from. The council is one, and it issues a completion certificate at the end. The other is a registered building control approver, the private route that was called an approved inspector until the register came in during 2023, and that route ends in a final certificate instead. Whichever you end up holding, it belongs with your deeds rather than in a drawer.
Structural openings need it. So does turning a garage or a loft into a habitable room, new or altered drainage, replacement windows, and some electrical work, though registered electricians self-certify most of that under Part P. Planning and building regulations are separate systems — the building regulations approval routes and whether you need planning permission at all are decided separately, and plenty of work needs the second without the first.
Which of the two you need is worth settling before a design exists, and the Planning Portal's interactive house is the quickest way to find out.
The reason to care is the sale. Your buyer's conveyancer will ask for the paperwork on any structural or conversion work, and work with none becomes a price negotiation, an indemnity policy, or a delay at the worst moment. That is what separates two Teesside builders whose numbers looked identical on paper.
What a realistic programme looks like
A building programme is a sequence of dependencies rather than a single duration, so you get staged dates instead of a headline number. Survey and drawings come first, then the engineer's calculation, then the building control notice, and only then does anybody dig.
The shape after that is consistent: groundwork, shell, roof, then the day the building goes weathertight, which is the point weather stops setting the pace. Then first fix plumbing and electrics, plaster, drying time, second fix, joinery, decoration, and the completion inspection.
Two things lengthen programmes and neither responds to effort. Plaster and screed dry at their own rate, and decoration rushed onto damp plaster is wasted. Lead times on windows, fabricated steel and worktop templating are set by suppliers, so we order early rather than when they are wanted.
We will not put a duration on a job nobody has seen. We will tell you which weeks are noisy, when water and power go off, and when the kitchen comes back.
When we are the wrong builder for you
We are the wrong firm if you want the wall out next week, because the engineer's calculation and any party wall notice come first and neither is shortened by enthusiasm. We are the wrong firm if you want the work done without notifying building control, which people do ask for and is not a saving we offer. We are the wrong firm for a single small repair, where our maintenance team is quicker and cheaper. And if you are comparing on the number alone, compare what each quote includes: the engineer's fee, the making good, the electrical alterations the new layout forces. A smaller quote for the same job is not a cheaper job.
Starting a project
Tell us what you are planning and we will come and measure it. You get a fixed written quote against a defined scope, a staged programme, and a variations process where nothing extra happens until you approve it in writing. Send us the details, or see what we have built if you would rather look than read. If you have bought a house and not moved in yet, mention the completion date. Those empty weeks are worth more to your budget than almost anything else you decide.
