We have a loft single bedroom approx 10’x10′ built at least 20 years ago by a previous owner of the house, but we don’t think the floor was strengthened at the time. In order to be able to state when selling the house, that is a usable bedroom, would the floor have to be strengthened? How expensive would this be and would additional timber joists be required or RSJ’s? And also what are the head room minimum requirements?

We would need to survey the property to give an accurate quotation to supply and install a structural  floor at the loft level, as we would need to check if you have internal load baring walls to confirm the size of the beams and joists required. With Reference to the head room, you must have 2m clear headroom above the staircase and above the loft landing at the top of the staircase. I think your best course of action would be to contact your local authority Building Control to confirm the exact amount of work required to make the room compliant. The reason i suggest this is that the regulations have changed over the last 20 years regarding fire regulations and insulation etc.

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