Cost of a Loft Conversion

A guide of the process of hiring a tradesman to carry out a full loft conversion, including the costs of labour and materials.

2-6 weeks
Avg price:


A loft conversion is a great addition to any home. A great game room for the kids, a sleeping space for guests, or simply using it for storage, when you’ve outgrown your home (but aren’t ready to move) are a few uses for the space.

Even if you simply choose to convert it to help increase size, for resale value, there is a benefit to converting a loft space. The cost is something which most homeowners want to control when undertaking this project. So, these are a few things to consider, if you are contemplating whether or not to convert your loft space.

What the job entails

You will obviously have to assess the space. Is it tall enough for sleeping/guest room? Do you need to add ventilation to the room, and if so, what kind? Are you going to add furniture? These are a few questions a designer or contractor will ask when considering converting the space.

They will initially measure the space. They will then determine the placement of the loft hatch, windows (if necessary), and how to actually go about the construction. Depending on what you ultimately plan on using the space for, is greatly going to dictate what goes into converting it. Adding beams, adding windows, cutting holes, or making external additions to the home, are all aspects which contractors will consider, and discuss with you, prior to, and during the conversion process.

Potential conversion issues

If you choose to use the space as a guest room, it may require plumbing or wiring work. Sometimes this is not only costly but requires external work, as well as work inside the home. The same goes with the HVAC system for air conditioning and heating. Potential issues always arise with these aspects of remodeling.

Space requirements and possible fire/safety concerns should be accounted for as well. Is the loft safe, is it easily accessible and easy to get out of, in the event of a fire or other dangers? You have to discuss these issues with a contractor who is working on the space. It is the only way to ensure guests or your children will be safe in the loft, in the event of an emergency in the home.

Delays in construction are another issue which comes with the territory of doing remodeling work; especially addition work to your home. If materials are delayed, if you choose to alter the project, or if there are other setbacks (zoning or permit issues), all of this can delay the construction, and the ultimate completion date, for your new converted loft space.

Additional projects

If you will use the space as a guest room, this is the time to do plumbing, wiring, electrical, HVAC, and other essential work in the space. You obviously want to utilise the space in the manner intended. If you don’t have running water, there is no way to do this. So, make sure these projects are completed when converting the loft.

Painting and aesthetic work should also be considered. Installing loft ventilation, ceiling fans, and decorative pieces to the loft, are all projects which will be easier to conduct while you are actually working in the space and converting it, rather than undertaking a separate DIY job or hiring another contractor to come in at a later date, in order to complete this additional work.

If you want to add windows, a hatch, or doors/exit systems, this is also the time to discuss the projects with your contractor. Again, it is easier to do everything at once, rather than each project individually. The time required will be shorter, and the costs you will incur in the conversion process are also going to be lower this way.

Costs & Duration

Any conversion loft will require a minimum of 2 weeks, even a very simple conversion. For a new bedroom or guestroom, you can possibly set aside 2-4 weeks to complete.

Costs will greatly vary, so it is best to discuss all aspects with the contractor, before agreeing to do any work. Materials, custom design work, plumbing, electrical work, and other essential work that has to be completed, will obviously increase the cost. This is in addition to the £150-£200 you’ll pay the contractors each for the cost of labour they charge, on a daily basis for their services.