Loft Conversions
Loft Conversion Drawings and Structural Design
Dormers, hip-to-gable and rooflight conversions, with floor joists, steels and fire escape routes designed by an engineer.
Structure Is the Hard Part of a Loft
A loft conversion is mostly a structural job: new floor joists, steel beams, a staircase with enough headroom and a protected escape route. Because we design the structure in-house, the drawings and calculations come from one engineer and match each other.
Many dormer lofts are permitted development. We confirm it with a Lawful Development Certificate, or prepare a planning application where it's needed.
Prices: Stage 1 £650 · Stage 2 £850 · Both £1,350 · Complete with calculations £1,795.
What's Included
- Measured survey including the roof space
- Planning or Lawful Development Certificate drawings
- Building Regulations drawings: floor, stairs, fire escape, insulation
- Structural calculations for joists and steels (Complete package)
Not Included
- Council and building control fees
- Party wall surveyor, if needed
Questions
Do I Need Planning Permission for a Loft Conversion?
Often not. Dormers within 40 m³ (terraced) or 50 m³ (other houses) that don't face the road are usually permitted development, except in conservation areas or where rights have been removed. Check yours.
Do I Need Structural Calculations for a Loft Conversion?
Almost always. New floor joists, steel beams and any change to the roof structure need calculations for building control. Ours are done in-house, so they match the drawings. They're included in the Complete package.
Do I Need Building Regulations Approval?
Yes, for every loft conversion used as a room. Building control checks the structure, fire escape route, stairs, insulation and ventilation.
Will I Need a Party Wall Agreement?
Often, on a semi-detached or terraced house, because steels usually bear on the shared wall. Notice must be served on your neighbours before work starts. We can tell you whether your design triggers it.
Related Guides
Ready for a Fixed Price?
Tell us about your project or the home you're buying. You'll get a clear, fixed quote, usually the same day.