A loft conversion is a popular way to add space to your house without needing to move. However, many homeowners are caught off guard by the bureaucratic process. Knowing which rules apply before starting work can help avoid time wasting, money draining and meetings with the council.
Do You Need Planning Permission?
Loft conversions usually fall under permitted development. This means you don’t need a full planning application. Roof lights that are flush with the existing slope of the roof usually qualify as well as conversions that stay within the volume limits. Dormer windows and changes to the front roof slope are likely to need a formal consent.
Homes in conservation areas, as well as flats and maisonettes, have different rules because permitted development rights are usually restricted. Be sure to consult your local planning office (or get a lawful development certificate) before spending money on design work, to make sure you understand the limitations.
Building Regulations Always Apply
Building Regulations generally cover the safety elements of a building (e.g. strong floors, means of escape, etc.). The majority of new buildings will require some form of Building Control by a Building Control Officer or Approved Inspector. The approving officer has to inspect the work at various stages to issue a final approval (usually in the form of a certificate of satisfactory completion).
Protect that certificate. Buyers’ solicitors will ask for it during a sale, and a missing one can slow down or damage a sale.
Structure, Stairs and Fire Safety
The ceiling joists as they are currently constructed, are not designed to support a ceiling that would also support a bed, and so typically, they require strengthening, often with the assistance of steel beams. Your structural engineer will determine the sizes, and the builders will construct to the engineer’s drawings.
There are regulations around staircases, such as having enough headroom and the correct gradient. Fire safety has to be considered too. Usually, a new room on the second floor would require fire doors, a protected escape route to the front door of the building, and interlinked smoke alarms.
Insulation and Ventilation
Loft rooms get really hot in the summer and really cold in the winter, meaning the roof doesn’t meet the current thermal standards. The best way to keep a loft room comfortable all year is to have good insulation between and over the rafters. Good insulation helps cut costs on your energy bills too. Make sure there is the correct ventilation to allow the moisture to escape so the timber doesn’t get wet.
Other Things to Sort Out
If your house is connected to your neighbour’s house by a shared wall, you will need to serve a party wall notice before you can start building. It is a good idea to go through this process to prevent any issues, and it should not be too complicated. You may also want to let your insurer and mortgage lender know about your new bedroom and any increase in value of your house, to be safe.
Lastly, pick a builder who will talk you through each approval, and has completed similar projects locally. Request to see completion certificates. A good paper trail is a good sign of a good build.