Office Development & Conversion Finance

Permitted Development rights allow the conversion of Class E commercial buildings (offices, retail, light industrial) to residential use without requiring full planning permission. Prior Approval from the LPA is still required, but this is a more limited process than full planning - the LPA can only assess a restricted list of matters (transport, flooding, contamination, daylight) and cannot refuse on design, density, or planning policy grounds.

For developers, PD conversion offers a faster route to consent than full planning, often with less uncertainty. For lenders, PD schemes are increasingly well-understood - the main risk is prior approval being refused or conditioned in a way that affects viability.

Six factors drive how a PD conversion application is assessed. Prior approval status is the pivotal one - most lenders will only draw once prior approval is confirmed - but Class E evidence, contamination, and daylight all need to be in place to keep the scheme marketable and the facility on track.

Prior approval status: full prior approval confirmed - most specialist lenders will draw the facility. Prior approval applied but not yet granted - some lenders will issue an offer in principle; very few will draw without consent.

LTGDV: 60-65% for PD conversion schemes with full prior approval. GDV assessed as the completed residential values (per-unit sales or investment value if retained as BTL/rental).

Class E confirmation: lenders require evidence that the building is in Class E use or was in that use at the relevant date. A lawful development certificate (LDC) confirming Class E use is the cleanest evidence and is required by most specialist lenders.

Contamination: PD prior approval requires assessment of contamination (a standard condition for many conversions). Lenders will want to see a Phase 1 contamination report. Phase 2 investigations (intrusive survey) are sometimes required where Phase 1 identifies risks.

Daylight and amenity: PD conversion does not guarantee every room meets residential daylight standards. A daylight report commissioned at design stage ensures the scheme is marketable and avoids disputes on completion.

Exit: sale of completed units - the most common exit for PD conversion. Refinance onto residential or BTL mortgages for retained units. Development exit bridging if development finance is approaching term with unsold stock.

Speculative new-build office development has contracted significantly post-2020 as occupier demand patterns shifted. Lenders are most comfortable with: build-to-suit (pre-let to a single occupier before construction), Grade A specification in prime locations (London City fringe, M25 corridor, regional cores - Manchester, Birmingham, Bristol), and ESG-compliant buildings (EPC A/B, BREEAM 'Very Good' or better) which attract the strongest occupier demand and investor appetite.

Speculative office development without pre-lets is significantly harder to finance than it was pre-pandemic.

A developer identified a vacant 1980s office building in a Surrey commuter town with Class E use confirmed by an LDC. Prior approval for 14 residential units was granted in 10 weeks. Doulton arranged £3.36m development finance at 60% LTGDV. The conversion was structurally straightforward - the existing concrete frame was retained. Build cost of £120 psf reflects the conversion premium over standard residential but the discount versus new build.

10 units sold on practical completion; the 4 retained units were refinanced onto BTL mortgages arranged by Doulton.