Loft conversions – 5 burning questions and experts 5 answers

Loft conversions – how much do they cost?

Each loft conversion is a unique project therefore estimates are based on your individual specifications and are unique to each home improvement project. Loft conversion is the most straightforward solution to add extra space, but there may also be planning constraints, roof structure, party walls, huge steel beams… which all need to be accounted for in the quote. Here are, however, some ballpark figures:

  • Velux – between £20,000-£25,000
  • Standard dormer – £25,000-£30,000
  • L-shaped dormer – £40,000-£45,000
  • Hip to gable loft conversions – £42.000-£48.000
  • Mansard – £45,000-£50,000 (requires planning permission)

Loft Conversion in Vale Road, Mansfield, Kent
Loft Conversion in Vale Road, kent
This loft conversion is a stunning addition to this family bungalow now offering three additional bedrooms, bathroom and ensuite housed in a large dormer to the side roof slope of the semi-detached bungalow.

How long do loft conversions take?

No specialist loft conversion company will be able to provide a detailed quote nor project timescale estimate if they don’t know the details of the construction, window type, dormers, steel work, plumbing (applies to a loft to bedroom with an ensuite conversion) and velux. Each general contractor will work in their own ways, which can sometimes take noticeably longer than the ‘expected average’ would suggest. A loft conversion for a 3-bedroom semi-detached house with proper staircase, flooring, beams and plastering takes somewhere around 10-12 weeks. More complex attic/loft conversions can take up to 12-14 weeks. It’s crucial that you enquire with your loft contractor, ask for photos from previous works and how long those specific works took. This should give you an indication of what renovation quality you can expect for your money.

Do loft conversions need planning permissions?

Local authorities have allowances for permitted development (PD) on most domestic properties. Often your loft conversion will not require planning permission. We will assess the planning rules that apply to your home and gain the planning certificate you require.

New Home and loft conversion in Sherwood Park Avenue
New Home and loft conversion in Sherwood Park Avenue
This new house was built on the side of the client’s existing home creating a large four bedroom property featuring an open plan kitchen, good size lounge at ground floor level with a bathroom and ensuite at first floor level together with a superb loft conversion at second floor offering an additional fifth bedroom.

Do I require insurance for my loft conversion?

If you are managing the loft conversion work yourself, you should consider arranging professional conversion insurance as most of insurance companies will not acknowledge damages or loss while the home alternation is undergoing. Make sure the insurance covers both new and old structures. If the existing structure collapses, your renovation insurance will cover all damages (conversion insurance, in this case, replaces building insurance that is not applicable in this case). Conversion insurance should cover all: materials, tools, temporary works and other equipment, and be put in place on the day of the beginning of works at the latest.

Looking for a specialist loft conversion company in Kent and South London? For further information on types of conversions and our processes, get in touch:
Email: ­
Tel: ­020 8302 4415

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