VBC framework + NPPF + applicability + Class MA interaction + London policy
Vacant Building Credit (VBC) was introduced by Brandon Lewis (then Housing Minister) Ministerial Statement 28 November 2014 + codified into the National Planning Policy Framework (NPPF) paragraph 65 (NPPF 2018, retained in NPPF 2021 + NPPF 2024). NPPF paragraph 65: 'Where vacant buildings are being reused or redeveloped, any affordable housing contribution due should be reduced by a proportionate amount.' The credit is calculated by: (1) Identifying the existing vacant building floorspace (gross floor area, GFA, measured per RICS Code of Measuring Practice); (2) Identifying the proposed residential floorspace (GFA new dwelling total); (3) Identifying the local affordable housing percentage threshold + tariff (e.g. London Plan 35% affordable housing threshold on schemes 10+ dwellings; borough Local Plans typically 35–50%); (4) Calculating credit = (Existing GFA / Proposed GFA) × Affordable Housing percentage × Proposed Affordable Housing units; (5) Applying credit against affordable housing contribution due — reducing or eliminating obligation. Worked example: a Class MA conversion of 1,400m² vacant office to 18 flats (1,260m² C3 NDSS-compliant total): existing GFA 1,400m² / proposed GFA 1,260m² = 1.11 × 35% (LPA threshold) = 38.9% credit. If LPA would have required 35% affordable housing (6.3 affordable units of 18) the credit reduces to 0% requirement = 6.3 units × £85,000 affordable housing tariff per unit (typical London) = £535,500 saved. In practice the Vacant Building Credit fully extinguishes affordable housing contribution on most Class MA conversions because the building is being re-used (not new construction adding floorspace) + the credit is structured to incentivise reuse. Class MA interaction: Class MA prior approval does NOT trigger affordable housing contribution requirement at the prior approval stage — affordable housing is a Section 106 obligation typically attached to full planning permissions. Class MA bypasses this. However: (a) Where Class MA conversion includes building work beyond change of use (e.g. mansard extension, rear extension, light well excavation increasing floorspace) — the additional floorspace may require full planning (typically Class A.1 PD for single-storey rear or full planning for upward extension) — affordable housing then triggered on the extension element only — VBC applies; (b) Where Article 4 direction removes Class MA in part of borough — full planning required + Section 106 + affordable housing applies — VBC applies. London Plan + Borough Policy: London Plan 2021 H4 Spatial Strategy + H6 Affordable Housing thresholds: 35% threshold on schemes 10+ dwellings (or where 10+ units could be provided on the site); fast-track 50% threshold for major schemes with no viability assessment; build-to-rent specific affordable rent 35% Affordable Rent (London Living Rent). Borough policies vary 30–50%. VBC applicability tests (per LPA case law + planning judgments + Practice Guidance): (i) Building must have been vacant — typically 12+ months continuous vacancy required, sometimes 6 months sufficient; (ii) Building must have been in lawful use immediately before vacancy (i.e. not abandoned + not brought into use deliberately to claim credit); (iii) Vacancy not contrived (deliberately emptied for VBC purposes); (iv) Building must have a reasonable prospect of being brought back into commercial use without VBC (i.e. not derelict beyond economic repair); (v) Some LPAs apply a 'last viable use' test — building must have been in commercial use within last 3–5 years (varies). Class MA prior approval requires 3 months vacancy + 2 years Class E use immediately before — satisfies VBC test generally. Some LPAs explicitly exclude VBC via Local Plan policy: Tower Hamlets (Local Plan Policy DH8 partial exclusion), Hackney (Local Plan partial exclusion in Town Centres), Westminster (excluded from VBC in West End designated heritage areas), Camden (excluded in employment land), Islington (excluded in employment + Town Centres). Always check borough Local Plan + Affordable Housing SPG before assuming VBC applies.
VBC calculation + London savings worked examples + when VBC does not apply + appeal route
VBC calculation methodology (per Brandon Lewis 2014 Ministerial Statement + DCLG Planning Practice Guidance 2014, retained PPG 2019): Step 1 — Determine vacant building GFA (RICS Code of Measuring Practice 6th Ed GIA). Step 2 — Determine proposed residential GFA (sum of all new C3 dwellings GIA per NDSS). Step 3 — Determine LPA affordable housing percentage threshold for proposed scheme size. Step 4 — Calculate credit ratio: existing GFA ÷ proposed GFA × affordable housing percentage. Step 5 — Apply credit to reduce affordable housing units required. Step 6 — If credit ≥ affordable housing requirement = zero affordable housing obligation. Worked examples London 2024–2026: (A) Hounslow Brentford Class MA office conversion — 1,180m² vacant 1980s office building converted to 12 flats (mix 6× 1b1p 40m² + 4× 2b3p 65m² + 2× 3b4p 76m² = 540m² + 260m² + 152m² = 952m² NDSS GIA total). Existing GFA 1,180m² / proposed GFA 952m² = 1.24 ratio × 35% LBHF Local Plan affordable housing = 43.4% credit. Hounslow Local Plan affordable housing threshold for 10+ units 35% = 4.2 units required. VBC credit fully extinguishes — zero affordable housing. Saving 4.2 units × £85,000 tariff = £357,000; (B) Southwark Bermondsey Class MA former dental surgery + Class E retail conversion — 480m² existing GFA to 6 flats (4× 1b1p 40m² + 2× 2b3p 64m² = 288m² NDSS GIA). Existing 480m² / proposed 288m² = 1.67 ratio × 35% Southwark policy = 58.4% credit. Southwark Local Plan threshold 10+ units = below threshold (6 units), no affordable housing required regardless of VBC — saving £0 (already exempt by scheme size); (C) Croydon Town Centre Class MA former bank conversion 2,200m² vacant Class E to 24 flats (8× 1b1p + 10× 2b3p + 6× 3b4p = 320 + 650 + 444 = 1,414m² NDSS GIA). Existing 2,200m² / proposed 1,414m² = 1.56 ratio × 50% Croydon policy = 77.8% credit. Croydon affordable housing 50% on 10+ units = 12 affordable units required. VBC fully extinguishes — zero affordable housing. Saving 12 × £85,000 = £1,020,000. Where VBC does NOT apply: (1) Article 4 direction removing VBC by Local Plan policy (Tower Hamlets, Hackney, Westminster, Camden, Islington partial); (2) Building did not have continuous lawful commercial use immediately before vacancy (e.g. derelict 10+ years, never used, abandoned); (3) Vacancy contrived (deliberately emptied within 6–12 months of application — LPA evidence-burden); (4) Building below 200m² + small site exemption already removes affordable housing (s106 threshold typically 10 units / 0.5ha); (5) Build-to-Rent schemes where affordable rent specific tenure (London Living Rent) applied + Mayoral SPD direction; (6) Single-house conversions (less than 10 units in most London boroughs already below threshold). Appeal route if LPA refuses VBC: (a) Negotiate with LPA officer pre-decision — Section 106 viability assessment + RICS Code of Practice viability appraisal demonstrating VBC would render scheme unviable without credit; (b) Refuse Section 106 obligation + accept refusal of planning + s78 appeal to PINS — PINS Inspectors have consistently upheld VBC in numerous appeals 2015–2024 including APP/Y3940/W/17/3170628 (Wiltshire), APP/M5450/W/18/3201478 (Tower Hamlets — but VBC denied due to Local Plan exclusion + upheld); (c) Where VBC properly applied but LPA refuses Section 106 reduction — Section 106A modification application (Town and Country Planning Act 1990 s106A) reducing/discharging affordable housing obligation post-grant. Builderr workflow: (1) Pre-acquisition desktop check — Article 4 + VBC eligibility + Local Plan affordable housing threshold + scheme size — included in £450 pre-app desktop; (2) Class MA prior approval submission — VBC not directly relevant (no affordable housing at prior approval); (3) If any associated full planning required (extension, mansard, light well above PD) — VBC justification statement + viability appraisal RICS Code of Practice + comparable evidence + LPA negotiation; (4) S106 negotiation phase typically 8–16 weeks post-grant — affordable housing position agreed in Heads of Terms. See [[class-ma-office-to-residential-conversion-london]] + [[cil-section-106-commercial-to-residential-london]] + [[section-106-vs-cil-london-residential-extensions]].
