Three steps to hiring the right loft specialist
First, ask to see photos and, ideally, visit a similar completed conversion. Second, confirm who handles the Building Regulations application and structural engineer input — directly or coordinated separately. Third, get a written quote covering the full scope, not just the headline conversion price.
Which roof types suit conversion best
A trussed roof (common in newer builds, using W-shaped truss supports) is generally harder and more expensive to convert than a traditional cut roof (older properties, using purlins and rafters) because trusses can't simply be removed without replacement structural support — worth having this assessed early, since it significantly affects feasibility and cost.
Common loft conversion myths, busted
"Any loft can be converted" — roof pitch, height and structure all affect feasibility; not every loft has enough headroom. "Planning permission is always needed" — often not, if within permitted development limits. "It's just adding a floor and a window" — the structural, fire safety and staircase requirements are far more involved than that.
Building Regulations and loft conversions
A full loft conversion into habitable space needs Building Regulations sign-off covering structural strength (new floor joists), fire safety (escape routes, fire doors), staircase access, insulation and ventilation. This isn't optional — it's checked when you sell the property and affects insurance and mortgage validity if skipped.
How much value does a loft conversion add?
A well-executed loft conversion commonly adds meaningful value to a property, though the exact amount varies significantly by area, property type, and how the new space compares to local expectations (an added bedroom typically adds more value than an office, for example) — worth researching comparable local sales rather than assuming a fixed percentage.
If planning permission is refused
A refused planning application for a loft conversion (usually for conversions exceeding permitted development limits) can sometimes be appealed or resubmitted with design changes addressing the specific objection — worth discussing with your specialist or a planning consultant rather than assuming refusal is final.
How long does a loft conversion take?
Simple boarding and insulation can be done in a day or two. A full loft conversion, including structural work, staircase, and fitting out, commonly takes 6-10 weeks depending on conversion type and complexity — dormer and mansard conversions typically take longer than a rooflight-only conversion.
How many quotes should you get?
Three is reasonable for a loft conversion. Make sure each quote covers the same conversion type and includes (or clearly excludes) Building Regulations fees and structural engineer costs, since these are sometimes quoted separately and can make quotes look more different than they actually are.