Should I use private Building Control or the Council?

When planning an extension, loft conversion or internal alterations, one of the most common questions homeowners ask is whether to use Local Authority Building Control or a Private Building Control Inspector. Both routes are fully legal, both issue the same Completion Certificate, and both ensure your project complies with the Building Regulations. The difference lies in how they operate, how quickly they respond, the level of service you receive and the risks involved. Understanding these differences early on helps you choose the option that best suits your project, budget and timeline.

What Is Building Control and Why Do I Need It? 

Building Control exists to make sure that any work carried out on your home is safe, structurally sound and compliant with the Building Regulations. This includes:

•Structural stability

•Fire safety and escape routes

•Insulation and energy efficiency

•Drainage and ventilation

•Electrical and plumbing safety

•Accessibility and general construction standards

Whether you are building an extension, converting a loft, removing a load‑bearing wall or altering drainage, you will almost always need Building Control approval. At the end of the process, you will receive a Completion Certificate, which is essential when selling or remortgaging your home.

Local Authority Building Control (Council)

Local Authority Building Control is the traditional route and is run directly by your local council. They provide a statutory service and must accept all applications within their area.

Advantages of Using the Council

•Guaranteed service (they cannot refuse your application)

•Familiar with local construction types and historic buildings

•Perceived as the “official” route, which some homeowners prefer

•No insolvency risk. The council cannot go out of business, so your inspection records and completion certificate are always secure.

Disadvantages

•Response times can be slower, especially during busy periods

•Less flexibility with site inspections

•Communication can be more formal and less personalised

•Fees can be higher depending on the council

Private Building Control (Registered Building Control Approvers) 

Private inspectors are fully qualified professionals authorised to carry out Building Control functions on behalf of the government. They provide the same checks, the same inspections and the same Completion Certificate as the council.

Advantages of Using Private Building Control

•Faster response times and more flexible inspections

•More personalised service and direct communication

•Often quicker turnaround on plan checks

•Can be more cost‑effective depending on the project

Disadvantages

•They can decline a project if it falls outside their remit

•For certain high‑risk or complex buildings, the council may still need to be involved

•Insolvency risk. If the company goes into liquidation before your project is signed off, you may lose access to your inspection records, may need to pay new Building Control fees, and the council may require additional inspections (including opening up finished work) before issuing a Completion Certificate.

Are There Risks When Using Private Building Control? 

Private Building Control is a perfectly legitimate and widely used route, but homeowners should be aware of one important consideration: if the private inspector’s company goes into liquidation before your project is signed off, you may lose access to your inspection records and may not be able to obtain a Completion Certificate.

This is because private inspectors operate as independent companies. If the business closes unexpectedly:

• Your inspection file may not be transferred to another provider

• The council may need to take over the case, but they are not obliged to accept previous inspections

• You may be required to pay new Building Control fees

• Additional inspections may be needed, including opening up finished work

• Your project could be delayed until a new inspector is appointed

Although this situation is not common, it is a real risk that homeowners should understand before choosing a provider. For straightforward extensions and internal alterations, many people still prefer private inspectors for their speed and flexibility, but it is important to choose a reputable, established company with a strong track record.

Which Option Should I Choose? 

Choosing between the council and a private Building Control inspector depends on the type of project, the timescales involved and the level of guidance you expect during construction. Both options are fully legal and both issue the same Completion Certificate, but they operate in different ways and the choice can affect the cost, speed and reliability of your project.

At BerGon Architects, we generally recommend using Local Authority Building Control (The Council) for most residential projects. This includes extensions, loft conversions, structural alterations and internal reconfigurations. The council provides a stable statutory service with no risk of insolvency. Your inspection records remain secure at all times and you will never face the possibility of paying Building Control fees twice. Their processes are consistent and reliable, which makes the council the safest choice for the majority of homeowners.

Private Building Control can still be suitable in certain situations. If your timescales are very tight, if the project is small and straightforward such as a simple garage conversion, or if you intend to proceed under a Building Notice rather than a Full Plans application and want to rely on the inspector’s on site advice, a private inspector may offer more flexibility and faster response times. These benefits can be helpful for uncomplicated projects where speed is the main priority.

Homeowners should be aware that private inspectors operate as independent companies. In recent years, companies going into liquidation has happened more frequently than most homeowners would expect. When this occurs in the middle of a project, it can leave homeowners exposed with no access to their inspection records. You may need to pay new Building Control fees and the council may require additional inspections before issuing a Completion Certificate. In some cases this can include opening up completed work. This risk does not exist when using the council.

In summary, BerGon Architects recommends the council for most standard home improvement projects because it provides long term security and consistent service. Private inspectors can be appropriate for small or time sensitive projects or when a Building Notice route is preferred, but the potential risks should be considered carefully. If you are unsure which option is best for your project, we can advise you based on the specific details of your proposal.