England and Wales · Separate from Planning Permission — Both Systems May Apply · Part B: Fire Safety — Escape Routes; Smoke Detection; Fire Compartmentation; Sprinklers (New Builds Over 11m) · Part L: Energy Efficiency — U-Values; SAP; New Builds and Major Renovations · Part F: Ventilation — Extract Fans; Whole-House Ventilation; Condensation/Mould Prevention · Part P: Electrical — Notifiable Work (New Circuit; Consumer Unit; Special Location: Bathroom; Kitchen; Garden) Must Use Part P Registered Electrician or Notify Building Control · RBCA (Registered Building Control Approver): Replaced Approved Inspector Under Building Safety Act 2022 · Completion Certificate: Issued on Completion — Essential for Sale; Remortgage; Insurance

Building Regulations for Landlords UK 2026 — Part B Fire, Part L Energy, Part F Ventilation, Part P Electrical Notifiable Work, RBCA and Completion Certificate

Building regulations for landlords UK 2026: building regulations approval (Building Act 1984; Building Regulations 2010) is required for most structural, energy, fire safety, electrical, and ventilation work — separate from planning permission. Key approved document parts: Part B (fire safety — escape routes; fire detection; compartmentation; sprinklers for new builds over 11m); Part L (energy efficiency — U-values for extensions; SAP for new builds; maximum U-values: walls 0.28 W/m²K; roofs 0.18 W/m²K; windows 1.4 W/m²K/Energy Rating C); Part F (ventilation — extract fans; whole-house ventilation to prevent condensation and mould — relevant to Awaab's Law damp/mould obligations); Part P (electrical notifiable work: installing new circuit; replacing consumer unit; work in special location — bathroom; kitchen near sink; garden; garage — must use Part P-registered electrician or notify local authority building control). Planning permission vs building regulations: two entirely separate systems — a landlord may need both, one, or neither. RBCA (Registered Building Control Approver): replaced approved inspector system under Building Safety Act 2022 from 6 April 2024. Completion certificate: issued on completion by local authority or RBCA — needed for sale; remortgage; insurance. Regularisation certificate: available from local authority for certain work done without approval — more expensive; not always available.

11 min readUpdated 7 June 2026Last reviewed: 17 May 2026building-regulationsPart-B-firePart-L-energyPart-F-ventilation

Part B (fire), Part L (energy), Part F (ventilation) and when building regulations apply

Building regulations approval (Building Act 1984; Building Regulations 2010) is required for most building work — separate from planning permission. Key approved document parts for landlords: Part B (fire safety): escape routes; fire detection (smoke alarms on each storey; heat alarm in kitchens); fire compartmentation between dwellings; sprinklers required in new residential buildings over 11 metres in England (from 26 November 2020). Part L (energy efficiency): minimum U-values for extensions and renovations: walls max 0.28 W/m²K; roofs max 0.18 W/m²K; windows max 1.4 W/m²K or Energy Rating C; SAP assessment required for new builds. Part F (ventilation): intermittent extract ventilation in bathrooms (8 l/s) and kitchens (15 l/s); whole-house ventilation strategy for new builds and extensions (Approved Document F, 2021 edition, in force 15 June 2022); adequate ventilation prevents condensation and mould — relevant to Awaab's Law damp and mould obligations under the HHSRS. Building regulations apply to: extensions; loft conversions; garage conversions; structural alterations; window and door replacements; heating system installations; electrical work (Part P); insulation installations. They do NOT apply to: like-for-like repairs; decorating; replacing kitchen units without structural alteration.

Part P (electrical notifiable work), planning vs building regs, RBCA and completion certificate

Part P (electrical safety): notifiable work must use a Part P-registered electrician (self-certifies) or be notified to local authority building control before starting. Notifiable work: installing a new circuit; replacing a consumer unit; work in a special location (bathroom; shower room; kitchen near sink; garden; garage; cellar). Non-notifiable: replacing like-for-like sockets, switches, and light fittings outside special locations. Planning vs building regulations: separate systems — a landlord may need both, one, or neither; always check both before starting work. RBCA (Registered Building Control Approver): from 6 April 2024 (Building Safety Act 2022), the approved inspector system was replaced by RBCAs — private sector building control bodies registered with the Building Safety Regulator (HSE); they perform the same inspection function as approved inspectors under tighter regulation. Completion certificate: issued by local authority or RBCA on completion of regulated work; needed for property sale (conveyancing solicitors will request it); for remortgage (lender requirement); and for insurance. Without a completion certificate: retrospective regularisation certificate from local authority available for certain work types (not all) — more expensive; requires the local authority to inspect completed work; not a substitute for obtaining approval in advance. Indemnity insurance: for historic undocumented work, a building regulations indemnity insurance policy can be used on sale to protect the buyer — but the policy provides financial protection only, not a guarantee of compliance.

Frequently asked questions

What is notifiable electrical work under Part P for landlords?+

Under Approved Document Part P, notifiable electrical work in dwellings includes: (1) installing a new circuit of any type; (2) replacing a consumer unit (fuse board); (3) any electrical work in a 'special location' — bathrooms, shower rooms, kitchens near sinks, outdoors/gardens, garages, cellars. This work must either be carried out by a Part P-registered electrician (who self-certifies) or notified to local authority building control before work starts. Non-notifiable work (no registration needed) includes replacing like-for-like sockets, switches, and fittings outside special locations.

What is the difference between planning permission and building regulations approval?+

They are entirely separate systems. Planning permission (TCPA 1990) controls whether development is permitted — form, appearance, use, size, and position. Building regulations (Building Act 1984) control technical standards — safety, energy, fire, ventilation, and electrical safety. A landlord may need both (e.g., a large extension on a listed building), planning only (some change-of-use applications), building regs only (a loft conversion within permitted development), or neither (like-for-like repairs). Always check both systems before starting work.

Why does a landlord need a building regulations completion certificate?+

A completion certificate is issued by the building control body (local authority or Registered Building Control Approver) on completion of regulated building work, confirming the work was inspected and found to comply with building regulations. It is needed for: property sale (conveyancing solicitors will ask for it); remortgage (lenders require it as evidence of compliance); and insurance purposes. Without a completion certificate, a landlord may need an indemnity insurance policy or a retrospective regularisation certificate — which is more expensive and not available for all work types.

Templates recommended in this guide

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Hand-picked by topic overlap with this guide.

England · Planning Permission IS Required (NOT Permitted Development — Material Change of Use from Single C3 to Multiple C3 Dwellinghouses) · Part B Fire Safety; Part E Acoustic (45 dB Rw; 62 dB Ln,w); Part F Ventilation; Part P Electrical · Completion Certificate from BCB or Approved Inspector · Each Flat: Separate Leasehold Title; Service Charge; RMC Structure

House to Flats Conversion UK 2026 — Planning Permission Required, Building Regulations (Parts B E F P), Acoustic Separation, Completion Certificate and Leasehold Demise

House to flats conversion UK 2026: converting a single dwellinghouse (C3) to multiple self-contained flats requires planning permission — this is NOT permitted development; it is a material change of use under the Town and Country Planning Act 1990. Building regulations compliance: Part B fire safety (fire doors FD30; compartmentation; smoke/heat detectors; 60-90 min fire resistance); Part E acoustic separation (airborne DnT,w + Ctr ≥ 45 dB; impact L'nT,w ≤ 62 dB — the most commonly failed requirement; timber floors require acoustic mat plus floating screed); Part F ventilation (trickle vents; mechanical extract); Part P electrical (separate consumer units; SWA cables; EICR). Completion certificate from Building Control Body (BCB) or Approved Inspector required before lawful occupation. Each flat demised as separate registered leasehold title; freeholder retains freehold; service charge provisions; buildings insurance; residents management company (RMC). HMO licensing if 3+ persons from 2+ households share building facilities.

Section 106 Agreements (TCPA 1990 s.106) · Condition on Planning Permission · Affordable Housing (20-40%; On-Site or In-Lieu) · CIL (Fixed Per-sqm Levy; Cannot Duplicate with s.106) · Three-Test Rule (Necessary; Related; Proportionate) · Viability Assessment (Residual Land Value; NPPF Para 57) · Binds Successors (Local Land Charge) · Modification/Discharge: s.106A After 5 Years · Scotland: s.75 Agreements

Section 106 Planning Obligations — Affordable Housing, CIL, Viability Assessments, Successors in Title and Scotland Section 75

Section 106 planning obligations are legally binding agreements between a local planning authority (LPA) and a developer or landowner as a condition of granting planning permission. They are used to make development acceptable where it would otherwise fail planning policy — typically by requiring affordable housing contributions or infrastructure payments. The affordable housing obligation (20-40% of new residential units above the site threshold, typically 10+ units in urban areas) is the most financially significant. CIL (Community Infrastructure Levy — Planning Act 2008) is a separate fixed levy charged per square metre of new floorspace that cannot duplicate s.106 infrastructure funding (CIL Regulation 122). Every s.106 obligation must pass three tests: necessary; directly related to the development; fairly and reasonably proportionate in scale. Viability assessments (residual land value calculation — NPPF para 57) allow developers to challenge unviable s.106 requirements. s.106 obligations bind all successors in title (registered as local land charges — discoverable on LLC1/CON29). Modification or discharge after 5 years under s.106A (TCPA 1990); appeal to Planning Inspectorate. Scotland: s.75 agreements under TCPA(Scotland) 1997; same principles; CIL not introduced in Scotland.

England: SI 2020/312 — 5-Year Inspection by Qualified and Competent Person · Satisfactory/Unsatisfactory · C1 (Danger Present — Immediate Action); C2 (Potentially Dangerous — Remedial Required); C3 (Improvement Recommended — NOT Mandatory); FI (Further Investigation Required) · Remedial Works Within 28 Days of Unsatisfactory Report · Supply to Tenant Before/At New Tenancy; to Existing Tenant Within 28 Days; to LHA Within 7 Days · Civil Penalty Up to £30,000 Per Breach · Scotland: Housing (Scotland) Act 2006 Repairing Standard — 5-Year EICR Mandatory · Wales: RHWA 2016 — 5-Year EICR from 1 December 2023

EICR — Electrical Installation Condition Report Landlord Requirements UK 2026

EICR (Electrical Installation Condition Report) requirements for landlords: England (SI 2020/312) — fixed electrical installation inspected and tested at least every 5 years; EICR observation codes: C1 (danger present — immediate action), C2 (potentially dangerous — remedial action required), C3 (improvement recommended — NOT mandatory; does not make report unsatisfactory), FI (further investigation required — makes report unsatisfactory); satisfactory report: no C1 or C2 observations; unsatisfactory report: any C1, C2 or unresolved FI; remedial works within 28 days (or shorter period specified in report); supply to new tenant before/at start of tenancy; to existing tenant within 28 days of written request; to local housing authority within 7 days of written request; civil penalty up to £30,000 per breach; emergency remedial action by LHA with cost recovery. Scotland: Housing (Scotland) Act 2006 Repairing Standard (ss.13-18) — 5-year EICR mandatory for Scottish private rental properties from 1 March 2022; EICR required at each change of tenancy if more than 5 years old. Wales: Renting Homes (Fitness for Human Habitation) (Wales) Regulations 2022 — 5-year EICR from 1 December 2023 for new lets.

Scotland Short-Term Let Licensing

Short-Term Let Licensing Scotland 2026 — Mandatory STL Licence, Edinburgh Control Zone, Planning Permission and Criminal Offence for Unlicensed Operation