
L-shaped dormer loft conversion planning permission
Keep to certain guidelines and you won’t need planning permission for your expansion, as it’ll come under Permitted Development. These currently include:
- No more than 50m³ added (detached/semi), 40m³ (terraces)
- Not in conservation district
- Not a listed building
- No balcony (Juliet allowed)
- No materials that aren’t in keeping with original structure
The part facing neighbours might require permission. The company carrying out the work should take into consideration all of these factors.
There are also Building Regulations that your construction firm needs to adhere to. Areas that need to be approved/certified include:
- Headroom (2m height usually required)
- Roof
- Heating
- Plumbing
- Electricals
- Stability of structure
- Insulation
- Sound proofing
- Glass/windows/balconies and flashings
- Stairs
- Fire safety
L-shaped dormer loft conversion cost
- From £50,000
It’s one of the most expensive ways to extend your home, but don’t let that put you off. An L-shaped dormer loft conversion price is high because it adds so much floorspace with usable headroom alongside — almost as much as your existing first floor.
The cost is about £15K more than a standard one, but given that you get another part for an additional room, it’s an investment well worth making. It’ll enlarge your liveable areas significantly, and increase the value of your property should you sell in the future.
Timeframes are longer, naturally, with an average of 7-10 weeks. So it’s understandable that the cost is higher in line with extended labour plus extra materials.
Why choose Fittra?
With 10 years experience we offer an end-to-end service, encompassing:
- Free consultations
- Planning permission process
- Legal advice
- Project management
- Buying discounts
- 5% deposit
- Tailor-made design
- Liability insurance: £5M public/products, £10M employer’s
- Considerate Constructors, TrustMark, FMB, NFB accreditations
- NHBC-registered
Contact us today to discuss your plans.