Do I Need Planning Permission for Electrical Work in 2026?
For internal electrical work — rewires, consumer unit upgrades, new circuits, smart lighting — the answer is no, you do not need planning permission. But every project is bound by Part P of the Building Regulations and BS 7671 18th Edition Amendment 2, both of which carry teeth: a missing Part P certificate at sale will cost you £3,000–£8,000 in re-test and remedial fees. The exceptions where planning matters: external lighting and CCTV, garden room sub-boards, listed buildings, and external mounting in conservation areas. This 2026 guide covers when planning kicks in, what Part P always demands, and the EICR documentation buyers will demand.
Electrical Planning & Building Regs — The Short Version
✓ No planning needed (Part P only)
- Full house rewire
- Consumer unit upgrade (Wylex/MK to dual-RCD)
- New ring final or radial circuit
- Replacement of accessories like-for-like
- Smart lighting, dimmers, USB sockets
- Internal LED downlight retrofit
- Bathroom lighting (Zone 0/1/2 compliant)
- EICR survey and remediation
- Adding a circuit for an electric oven or shower
✗ Planning may apply
- External CCTV cameras overlooking neighbours/highway (sometimes)
- External lighting on a listed building
- External lighting fronting a highway in a conservation area
- External fuse cabinet at the boundary
- Sub-board for a garden room or annexe (PD usually OK)
- Three-phase supply upgrade requiring an external substation
- Buried armoured cable in a highway verge (Section 50)
Part P — What Counts as Notifiable Work
Part P of the Building Regulations divides electrical work into notifiable and non-notifiable categories. Notifiable work must be either inspected by Building Control (£200–£500) or installed by a Competent Person Scheme member who self-certifies (no extra fee). Non-notifiable work needs no certification but must still comply with BS 7671.
Special locations are: bathrooms, swimming pools, saunas. Any work in these zones is automatically notifiable, regardless of scale.
What's Changed in 2026 — BS 7671 Amendment 2
BS 7671:2022 Amendment 2 (effective March 2023, fully enforced through 2026) tightened a number of rules that affect domestic electrical work:
- AFDDs (Arc Fault Detection Devices) recommended on bedroom circuits, accommodation for sleeping (in HMOs and hostels they're mandatory)
- Type-A RCBO minimum for circuits with electronic loads (was Type-AC)
- Type-B RCBO required on EV charger circuits (or specific O-PEN device)
- SPDs (Surge Protection Devices) recommended on all CU upgrades
- Arc fault devices required on socket outlets up to 32A in certain settings
- New requirements for secondary protection of fuse boards
For an existing CU upgrade, expect a 10-way RCBO board with SPD to cost £800–£1,200 fitted (vs £550–£750 for the older dual-RCD spec). For a full house rewire on a 3-bed semi, expect £4,500–£7,500 including new CU, all circuits, accessories and certification.
Why EICR Documentation Matters at Sale
An Electrical Installation Condition Report (EICR) is a snapshot of the installation's safety. For owner-occupied properties it's recommended every 10 years; for rented properties it's mandatory every 5 years. At sale, conveyancing solicitors increasingly demand to see one — buyers have grown wise to the cost of fixing a missing Part P trail (£3,000–£8,000 typical for a 2010s rewire without certificates).
An EICR rates each issue as C1 (danger present, immediate action), C2 (potentially dangerous, urgent), C3 (improvement recommended) or FI (further investigation needed). C1 and C2 codes mean the installation is unsatisfactory and remedial work is required before the certificate can be reissued as satisfactory.
Typical EICR costs (May 2026)
- 2-bed flat: £140–£190
- 3-bed semi: £190–£250
- 4-bed detached: £250–£350
- Buy-to-let landlord package (cert + minor works): £280–£420
When External Electrical Work Triggers Planning
External lighting
Domestic external lighting is generally PD. Three planning triggers: lighting on a listed building (Listed Building Consent), lighting on a highway-fronting elevation in a conservation area (especially uplighters or floodlights), and any lighting that creates unacceptable glare for neighbours (statutory nuisance, not planning, but enforcement is similar).
CCTV cameras
Domestic CCTV is generally PD provided cameras are positioned to record only your own land. Cameras overlooking a highway or neighbour's garden may need planning, and trigger UK GDPR obligations: appropriate signage, registered with the ICO if cameras are extensive, and a written privacy assessment.
Garden room sub-boards
A sub-board in a garden room or workshop is fine under Class E PD if the building itself is PD-compliant. SWA cable run from the house can be buried under the lawn or surface-clipped to a garage wall — both are PD. Earthing arrangement needs careful thought (TT vs TN-S) — discuss with your installer.
Talk to NICEIC-Registered Electricians
NICEIC, ECA, ELECSA and NAPIT-registered electricians self-certify Part P notifiable work, issue EICs at completion, and submit Building Notification on your behalf. BestBuilders matches you with up to 3 vetted UK electricians.
Common Questions About Electrical Work
Do I need planning permission for a house rewire?
No - rewires are internal electrical work and not "development". Part P of Building Regs applies. A NICEIC/ECA installer will self-certify the rewire and submit Building Notification.
Do I need to notify Building Control for a CU upgrade?
CU upgrades are notifiable Part P work. Either a Competent Person Scheme installer self-certifies (free), or you pay Building Control 200-500 pounds to inspect. CPS is overwhelmingly the easier route.
Do I need an EICR before selling my house?
Not legally required for owner-occupied homes, but increasingly demanded by conveyancing solicitors. A satisfactory EICR (no C1/C2 codes) is the easiest way to evidence the installation's condition. Cost 190-350 pounds depending on property size.
What is BS 7671 Amendment 2?
The 2022 update to BS 7671 (the Wiring Regulations), fully enforced through 2026. Key changes: AFDDs recommended on bedroom circuits, Type-A RCBO minimum, Type-B for EV chargers, SPDs recommended on all CU upgrades.
Do I need planning for external CCTV?
Generally no, provided cameras record only your own land. Cameras overlooking a highway or neighbour need planning consideration. UK GDPR also applies - signage, ICO registration if extensive, and a privacy impact assessment.
Can I do my own electrical work?
You can technically, but notifiable work must then be inspected and certified by Building Control or a registered third-party verifier. This costs more than just hiring a Competent Person Scheme installer in the first place. Non-notifiable work (adding sockets to existing circuits, replacing accessories) is fine to DIY.
Do I need planning for electrical work in a listed building?
Internal work to existing wiring is usually fine, but new chases through walls or ceilings, surface-mounted conduit visible inside, or external fittings need Listed Building Consent. Use existing voids and conceal where possible.
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