What a loft conversion really costs in Stoke-on-Trent.

Search 'loft conversion cost' and you will get confident national averages: forty grand, sixty grand, a range with a tidy midpoint. Follow them back and almost none name a source. They are estimates written to rank, and they are the reason people ring builders with a number in their head that has nothing to do with their house.

The cost of your loft is set by things a web page cannot see: whether the existing joists can be doubled or have to be replaced with steel, where the stairs can physically go and what room loses floor space to make room for them, whether you need a dormer or the roof already has the height, and whether there is an en-suite. Those are survey questions, not article questions.

So we price after we have been. What we can do here is tell you exactly what the money goes on, which is more useful than a number you cannot rely on.

Making a loft habitable triggers building regulations approval every time. That is not optional and it is not a formality, and it dictates real work.

Fire is the biggest item people do not expect. The Planning Portal's guidance is that a loft conversion to a two-storey house will need "new fire-resisting doors and sometimes partitions to protect the stairway", because escaping through a window from above first-floor level is too dangerous, plus "mains powered, interlinked smoke alarms within the stairway at each level". In practice that means fire doors to the rooms off the stairs, not just the loft.

The stairs themselves are the second. It has to be a real staircase: a space-saving stair may be acceptable where there is genuinely no room, but a retractable ladder is not. That staircase has to land somewhere, and the floor space it takes from the room below is a design decision with a cost attached.

Third, the structure. Ceiling joists are sized to hold up a ceiling, not to carry people and furniture, so the floor is normally rebuilt or reinforced, and cutting the stairwell opening means trimming the joists you cut and supporting what they were holding.

Usually not. Most loft conversions are permitted development, within limits the Planning Portal sets out: up to "40 cubic metres for terraced houses" or "50 cubic metres otherwise", nothing extending beyond the existing roof slope on the elevation facing a highway, "materials similar in appearance to the existing house", side-facing windows obscure-glazed and 1.7 metres above the floor, and no verandas, balconies or raised platforms.

Two things to check before you rely on that. Permitted development rights can be removed, and conservation areas have their own rules: Stoke-on-Trent has a number of them. And permitted development is not the same as building regulations. You can be fully permitted and still need approval for every item in the section above.

We are not going to invent a value uplift figure either. Nationwide publishes analysis of its own mortgage lending, which is a real dataset rather than an estimate: adding space to create an additional double bedroom "can add around 14%" to a two-bedroom house, an additional bathroom "can add 6% to the value of the average house", and a 10% increase in floor space "adds 5% to the price of a typical house". An extension adding both a bedroom and a bathroom to a three-bedroom, one-bathroom house can add "as much as 25%".

Their own caveat, published with it: "Location remains key to house values." The figures cover the year to June 2023 and they are national. What a loft is worth on your street depends on your street, and on whether buyers there want a fourth bedroom or a bigger kitchen.

The three we see most often, in order.

Head height. If there is not enough height under the ridge, the options are a dormer, lowering the ceilings below, or not doing it. That is the first thing worth measuring, before anyone talks about money.

The stairs as an afterthought. A loft is only worth what the access makes it. A bedroom you reach through another bedroom is not a bedroom for valuation purposes, and a stair squeezed into the only sensible spot can ruin the landing below.

Fire work priced out to win the job. If a quote is materially cheaper than the others, look for the fire doors, the alarm system and the floor upgrade. Those are the items that get quietly dropped, and they are the items building control will fail.

We come and look. We measure the head height, work out where the stairs can go, look at the existing joists and the roof structure, and tell you what the building regulations will force on this specific house. Then you get a real price and a real programme, agreed before anything starts, and it moves only if the building throws up something genuine or you ask for extra work.

If your loft does not work, we will say so on the first visit rather than sell you a survey to find out.