Building Regulations Fees Estimator UK 2026/27 — Building Control

Submitting a Building Control application for a home extension, loft conversion, internal structural wall removal, or new dwelling in the UK is mandatory to ensure compliance with statutory Building Regulations.

Under the Building (Local Authority Charges) Regulations 2010 and the Building Safety Act 2022, homeowners can choose between Local Authority Building Control (LABC) or a Registered Building Control Approver (Private Approved Inspector), paying a fee based on the estimated cost of building works.

⚙️ Statutory Building Control Routes & Rules for 2026/27

1. The Three Primary Building Control Routes

• Full Plans Application (Recommended for Major Works / Extensions):
  • Detailed architectural drawings, structural calculations, and thermal specs are submitted and checked before work starts.
  • Fee Split: Divided into a Plan Charge (payable on submission, ~35% of fee) and an Inspection Charge (payable after the first site inspection, ~65% of fee).
• Building Notice Application (For Minor Alterations):
  • No detailed plans are checked in advance. Work proceeds directly on site with stage inspections.
  • Fee Structure: Paid in full upfront as a single charge (typically 10% higher than Full Plans due to higher site risk).
• Regularisation Application (Unapproved Retrospective Work):
  • For unapproved past building work completed without building control consent after 1985.
  • Statutory Surcharge: Local authorities charge the standard fee plus a mandatory 50% surcharge. Regularisation fees are VAT exempt under HMRC rules.

2. Standard UK Local Authority Fee Scale (Estimated Work Values)

Fees are set locally by individual councils to recover costs:

• Works Value £10,000 to £20,000: Total fee ~£450 to £550 + VAT.
• Works Value £20,000 to £40,000: Total fee ~£600 to £750 + VAT.
• Works Value £40,000 to £60,000: Total fee ~£750 to £900 + VAT.
• Works Value £60,000 to £100,000+: Total fee ~£900 to £1,200+ + VAT.

📊 Practical Building Control Fee Worked Examples

Below are two worked calculation examples illustrating building control application fees:

📑 Common Pitfalls & Building Control Warnings

1. Confusing Planning Permission with Building Regulations: Planning permission grants approval for site use and external aesthetics. Building Regulations cover structural integrity, fire safety, insulation (Part L), drainage (Part H), and electrical safety (Part P). You must have both.
2. Failing to Notify Key Inspection Stages: Building control inspectors MUST be notified at specific milestones: excavation of foundations, damp proof course (DPC) laying, oversite concrete, drainage testing, and roof timber structure before covering up.
3. Not Securing a Completion Certificate: Always ensure your inspector issues a formal Building Control Completion Certificate upon final inspection. Without this certificate, selling or remortgaging the property in future will be blocked by buyers’ conveyancers.

❓ Frequently Asked Questions (FAQ)