Converting a loft to a bedroom will not always require planning permission. If you are not going to alter the exterior of your home then chances are that you won’t need permission. What you will need though is building regulations approval.
The fire door regulations for loft conversions are understandably strict and the building regulations have been continually updated to reflect new fire safety rules. The last major change came way back in 2007 and, even now, home owners are still being caught out by the new rules.
Building regulations are in place to make sure that any work done is structurally sound, that the new room is fire safe and that sound is reasonably insulated between the loft and the rooms below. The specific regulations that apply will depend on the type of conversion you have.
However the average dormer loft conversion with a double bedroom and en suite costs about £35,000–£45,000. ‘Raising the Roof’ or Changing the Roof Structure This option is the most expensive as it requires the complex removal and rebuild of the existing roof.
Building regulations approval is required to convert a loft or attic into a liveable space. This section provides guidance for making alterations to the loft space of an existing house which is no more than two storeys high.
Building Regulations Information What are building regulations? If your loft conversion is intended for use as new accommodation, for example a bedroom, study or office then you will need to make a Building Regulations application.
The bonus room referred to the loft which had been converted years and years ago by one of the previous owners. It was sold as a bonus room because there was no record or document (building regs certificate, etc.) for this loft conversion.
A loft conversion for your house is considered to be permitted development, not requiring an application for planning permission, subject to the following limits and conditions: A volume allowance of 40 cubic metres additional roof space for terraced houses*
“Even if the loft has been converted in accordance with general loft conversion building regulations, the appropriate building control completion certificate demonstrating the conversion complies with the regulations which make the room suitable for use as a bedroom are also required.” says Guy Beaven from Abbey Lofts.