Building Regulations — the safety and <em>performance</em> rulebook.
Building Regulations are different from planning permission — planning is about whether you can build, building regs is about how it must be built. The Building Regulations 2010 (with substantial 2022 amendments on energy efficiency and ventilation) are enforced by Local Authority Building Control (LABC) or by an Approved Inspector.
When do I need building regulations approval?
You need Building Regulations approval for any structural alteration, new circuit, new heating, drainage, replacement window or door, replacement boiler, loft conversion, extension, change of use, or new bathroom in the UK. Repairs and decoration are exempt; replacing a like-for-like fitting on existing services is exempt. Building regs is separate from planning permission — most projects need both.
Statutory guidance documents (A–S excluding I and N) covering specific aspects of construction.
Section 36 enforcement notice + remediation cost where unauthorised work is discovered.
LABC has 12 months to issue a Section 36 notice for unauthorised work.
Building Regs — the terms that matter
Plain-English definitions for the 6 terms you'll see in any quote, certificate or enforcement notice for Building Regulations 2026.
- Local Authority Building ControlLABC
- The council's building-control function. Issues approval, inspects work, signs off compliance certificates. Charges fees per Schedule 1 of the Building Regs.
- Approved InspectorAI
- A private-sector competent body (e.g. Stroma, Sweett) authorised to perform building-control duties as an alternative to LABC. Same statutory duties, often faster turnaround.
- Approved DocumentAD
- Statutory guidance from DLUHC explaining how to comply with each Part of the Regulations. There are 18 — Parts A through S excluding I and N. Following an AD is the safe-harbour route to compliance.
- Full Plans ApplicationFull Plans
- The slower, safer building-regs route — full drawings + calculations submitted before work starts, approved by LABC, then inspected during build. Recommended for extensions and structural work.
- Building NoticeBN
- The faster route — work starts within 2 days of notification, inspected as it progresses. Cheaper up-front but riskier on complex jobs because design isn't pre-approved.
- Section 36 Enforcement NoticeS36
- A formal notice from the council requiring unauthorised work to be put right or torn out. May be issued up to 12 months after the breach.
How to navigate building regulations on a home extension
Five steps from instruction to certificate. Total time: 10w.
01
Get your drawings
Week 0–4
Commission an architectural technologist or architect to produce planning + building-regs drawings. The building-regs set covers structural sections, thermal spec, drainage, ventilation, fire egress.
02
Choose Full Plans or BN
Week 4
Full Plans = drawings approved before work starts, safer. Building Notice = faster but no pre-approval. Anything structural should go Full Plans.
03
Submit + pay
Week 4–6
Application to LABC or an Approved Inspector. Fees: £200–£1,500 typical householder; commercial / multi-storey higher. Plan-check takes 5–8 weeks.
04
Inspections during build
Throughout
Statutory inspections at: foundations, oversite, drainage, damp-proof course, structure, insulation, completion. Each booked 24–48 hours ahead.
05
Final certificate
Week 10+
On final inspection sign-off, LABC / AI issues a Final Certificate. Keep with title deeds — buyers and mortgage lenders ask for it on every transaction.
Building Regulations 2026. Done compliant.
Every TradeMatch-listed tradesperson covering Building Regulations 2026 carries the relevant scheme registration. Verified at onboarding, re-verified annually, certificates posted to you within 30 days of any notifiable work.
Building regulations vs planning permission — separate regimes
Side-by-side comparison of the compliant route versus the unregistered shortcut. Most rows trace a straight line from regulation to financial exposure.
| Aspect | Planning permission | Building regulations |
|---|---|---|
| COMPLIANT — RECOMMENDEDQuestion answered | Can you build it here? | How must it be built safely? |
| Authority | LPA — local planning department | LABC or Approved Inspector |
| Statutory ref | Town & Country Planning Act 1990 + GPDO 2015 | Building Regulations 2010 (as amended) |
| Decision time | 8 weeks householder / 13 weeks major | 5–8 weeks plan-check + ongoing inspections |
| Cost (typical) | £258 householder LPA fee + drawings | £200–£1,500 LABC + drawings + structural calcs |
| Failure to obtain | Enforcement up to 4 years (4-yr / 10-yr rule) | S36 notice up to 12 months; sale-time disclosure indefinitely |
Source: Town & Country Planning Act 1990, Building Regulations 2010, DLUHC fees schedule 2024.
The questions homeowners ask before they commit.
What's the difference between planning permission and building regulations?
Planning is about whether you're allowed to build something at all (siting, scale, neighbourly impact, conservation). Building regs is about how it must be built to be safe, energy-efficient, and accessible (structure, fire, thermal, drainage). Most projects need both — they run on parallel tracks but are decided by different bodies.
Do I need building regulations approval for a conservatory?
A conservatory is exempt from building regulations if it's under 30 m², built mostly at ground level, separated from the main house by external-quality doors, and the heating system is independent. If it's above 30 m², joins the main heating, or removes external walls, it needs Full Plans approval.
How much do building regulations cost?
LABC plan-check + inspection fees for a typical householder extension run £400–£900 (most councils publish a fee schedule by floor area). Approved Inspectors are typically 10–15% pricier. Add £200–£600 for an architectural technologist's building-regs drawings package, and £400–£1,500 for structural engineer's calculations.
What happens if I do work without building regulations?
The council can issue a Section 36 enforcement notice up to 12 months after work completes, requiring you to remediate or remove. At sale, the buyer's conveyancer will request the Final Certificate — no certificate triggers a Regularisation Certificate application (£300–£800 plus inspection that may force remediation) or an indemnity insurance route.
Can I do a loft conversion without building regulations?
No. Every loft conversion in the UK needs building regulations approval, even where planning permission isn't required (most are permitted development). Structural calculations for the new floor and stair, fire-resistance to the rest of the house, thermal upgrade and emergency egress are all controlled by Building Regs.
What are the 2022 changes to building regulations?
June 2022 amendments to Approved Documents F (Ventilation), L (Conservation of Fuel and Power), O (Overheating) and S (EV charging). Headlines: minimum SAP-rated thermal spec on extensions; mandatory trickle vents on replacement windows; mandatory overheating analysis on residential builds; mandatory EV-charge cabling on every new dwelling and every dwelling extended with off-street parking.
Going deeper.
Building work, building-regs covered.
TradeMatch builders, architects and architectural technologists handle the full drawings + LABC submission package — fixed fee, no surprises.