Local Authority Building Control vs Private Approved Inspectors

Local authority building control (LABC) is the building control service provided by your council. Every council has one. They are a public service funded by the fees you pay plus council resources.

Private approved inspectors are commercial companies registered with the Building Safety Regulator (formerly CICAIR). They compete with local authority building control for work. There are roughly 40–50 approved inspector companies operating across England.

Both are authorised to check building work, carry out inspections, and issue completion certificates under the Building Act 1984.

• You need regularisation. If previous building work was done without building regulations approval, only your local authority can handle this.
• The project is straightforward and local. LABC inspectors know the local ground conditions, typical soil types, drainage infrastructure, and common issues in your area.
• You want a single point of contact with the council. If your project also involves planning permission, using LABC keeps everything with the same council.
• Cost is a priority. LABC fees are fixed and published. For standard residential projects, they are often competitive.
• The builder prefers it. Many builders have established relationships with their local building control team.

• You want flexibility on timing. Private inspectors often offer more flexible inspection times — including early mornings, evenings, or weekends.
• You want the same inspector throughout. Private companies typically assign one inspector to your project from start to finish.
• You want a more responsive service. Private inspectors are competing for your business and may respond faster to queries.
• The project spans multiple council areas. A private inspector can cover all projects under one agreement.
• Your builder recommends one. Some builders and architects have relationships with specific private inspectors and find the process smoother.

The differences are usually small. Get quotes from both your local authority and one or two private inspectors before deciding.

With private inspectors

• Check registration. Make sure the company is registered with the Building Safety Regulator.
• Understand the fee structure. Some quote a low headline fee but charge extras for additional inspections or re-inspections.
• Enforcement referral. If a private inspector discovers non-compliant work that is not corrected, they must refer the matter to the local authority.

With LABC

• Response times. Some councils are understaffed and slow to respond.
• Inspector changes. You may not get the same inspector at every stage, which can lead to inconsistency.
• Office hours only. Most LABC services operate during standard office hours.

For most homeowners building a single extension or loft conversion, the choice between LABC and a private inspector makes very little practical difference. Both routes are equally valid, both result in the same legal outcome, and the cost difference is usually small.

Choose LABC if you want simplicity, local knowledge, and a published fee structure.

Choose a private inspector if you want flexibility, consistency of inspector, or your builder has a strong preference.

Either way, the important thing is that you get building regulations approval and a completion certificate. The route matters far less than the outcome.