What are permitted development rights?
Permitted development rights (PDR) allow certain types of development to proceed without the need for a full planning application. The most common PDR route used in property development is Class MA — the conversion of commercial, business, and service premises (Use Class E) to residential dwellings (Use Class C3).
While PDR removes the need for full planning permission, it does require prior approval from the local planning authority, which assesses specific impacts including transport, contamination, flooding, noise, natural light, fire safety, and the impact on the provision of services.
Why PDR projects are attractive to developers
- Speed — prior approval is determined within 56 days (vs. 8–13 weeks for full planning, often much longer with appeals).
- Certainty — the grounds for refusal are limited and specific.
- No affordable housing — PDR schemes are generally exempt from affordable housing contributions, improving viability.
- CIL exemption — many local authorities do not charge CIL on PDR conversions.
- Existing structure — conversion of an existing building can be faster and cheaper than ground-up construction.
How lenders assess PDR schemes differently
While PDR simplifies the planning element, lenders apply additional scrutiny to conversion projects:
- Building condition — the structural adequacy of the existing building is critical. Asbestos, structural defects, and services upgrades can blow budgets.
- Space standards — nationally described space standards apply. Units must meet minimum sizes, and natural light requirements can limit the number of viable units.
- Build cost risk — refurbishment costs are inherently less predictable than new build. Lenders expect a higher contingency (7–10%).
- GDV evidence — converted offices may not achieve the same £/sqft as purpose-built residential, depending on quality and specification.
Financing a PDR project
Development finance for PDR conversions follows the same structure as new build — day-one advance for acquisition, build facility drawn in stages. However, some differences:
- Day-one advance may be based on the commercial value (which could be lower than the purchase price if the building has been vacant).
- Lenders may require a building survey before approving the facility.
- The monitoring surveyor plays a particularly important role, as refurbishment works can be unpredictable.
- Some lenders specialise in PDR and understand the specific risks — matching to these lenders improves terms.
Frequently asked questions
Do all offices qualify for PDR conversion?
No. The building must have been in commercial use (Use Class E) for at least two continuous years before the application. Some areas have Article 4 directions that remove PDR rights, requiring a full planning application instead. Always check with the local planning authority before committing to a purchase.
What is the typical profit margin on PDR schemes?
Well-executed PDR conversions can achieve profit on cost of 20–30%, partly due to the absence of affordable housing obligations and CIL. However, margins can be eroded quickly if the building condition is worse than expected or if unit counts are reduced during prior approval.