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Loft Conversions Wales

DIY Loft Conversion

Are you working with a limited budget for your dream loft conversion? Do you want to do it yourself in your own time and pace? The good news is that we can make it possible for you! We offer a first-fix loft conversion where we will build the structure, and you can do the remaining works and save money.

What is First-fix Loft conversion?

The first-fix or shell loft conversion is a part build loft in which our team will complete all the major structural work. It involves all the technical and challenging jobs associated with a loft conversion, which includes the installation of steels, stairs and other structural work. It is a cheaper alternative since the customer can do some of the tasks for the second fix, like plumbing and electrics, which in turn minimises the cost of the overall project.

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What is included in the first fix?

The first fix includes the finished and watertight structure for the loft with a new staircase. The rest of the job will be left to the customer to complete. It will give you the freedom to be creative in completing the project on your own or to hire your chosen tradesman that can complete the project.

The shell loft conversion includes the following:

  • A complete and detailed on-site survey
  • Comprehensive architectural drawings which include all structural engineering calculations
  • All scaffolding
  • Fitting Steel beams that comply with building control requirements
  • Construction of suspended structural floor
  • Construction of the dormer or mansard
  • Velux Windows Installation
  • Tiling of the new dormer
  • Finished flat roof on dormer (with a torch-on membrane, GRP, EDPM finishes available)
  • Installation of external windows and doors
  • Construction and installation of the staircase (this excludes the handrail & spindles which will be fitted by you)
  • Cleaning and removal of all debris from the construction site

The Process

The first-fix loft conversion is divided into four parts:

  1. The first step involves an assessment to determine if the loft conversion requires planning permission or it can be completed under the permitted development. We would be able to advise on this during the initial meeting with the design consultant. 
  2. The architectural plans will then be drawn up, detailing all of the structural engineering calculations required to ensure that the work carried out complies with current building regulations.
  3. Once the customer has approved the plans, the construction of the first-fix loft could commence. We will install the beams, joists, suspended floor, the dormers, the new staircase and the windows.
  4. After completing the structural work, we will hand the conversion back to the customer to allow them to complete the internal work. It involves the plumbing, plastering, electrical installation and the second-fix carpentry.


If you have any specific queries please contact us through  the form below.

The cost will vary depending on your existing house and the loft conversion design that you want to achieve. However, you can have substantial savings since we will only cover the structural elements of the project. The rest of the job can be your DIY project.

We would typically carry out the complicated engineering and the structural elements including the staircase, dormers and Velux windows.

Most properties possess permitted development rights which allow the construction of a loft conversion without planning permission. However, there are some exceptions to this, and we will guide you through this process if it applies to your project.

We will install all the structural steelwork, a staircase and any dormer, mansard or Velux windows. You will then be able to finish the project whenever you want to — putting in plumbing, electrical, joinery and stud walls. You can then dry line, plaster skim and fit doors, architrave and skirting along with your choice of decoration and floor coverings.


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