The Building Safety Act is part of the building safety legislation produced in the wake of the 2017 Grenfell Tower disaster.

It’s aim is to;

  • Enhance safety standards
  • Ensure accountability
  • Maintain thorough documentation throughout a building’s lifecycle

The Building Safety Act for Homeowners – Does the Building Safety Act apply to you and your project?

If you are undertaking works that requires Building Regulations approval – Yes absolutely!

There is a misconception that the Building Safety Act only applies to high rise buildings – this is not the case. It applies to ALL construction projects where you have to apply for Building Regulations approval.

The Building Safety Act will change the way buildings are designed, constructed, and managed.

The Act enables the introduction of new regulations covering the competence of all those who undertake building work with new statutory roles for Designers and Contractors on all projects.

Who are duty holders?

  • clients (homeowners, developers, employers)
  • designers
  • principal designers
  • contractors and
  • principal contractors

What does it mean for you as a homeowner?

As a client (dutyholder), you are legally responsible for:

  • Appointing competent professionals to design and build your project.
  • Sharing relevant information related to your project.

What you need to do

When a building regulations application is submitted, you (the client and homeowner) have to declare who is taking on the principal designer duties – you have to be confident they are a competent designer.

Similarly, when you appoint a builder as principal contractor then you need to be confident they are a competent builder.

Both need to deliver your project such that it complies with the Building Regulations..


Typically, your designer will serve as the Principal Designer, and your builder will act as the Principal Contractor.


The changing role of Building Control

Building Control will no longer be able to advise how to comply with Building Regulations – it will be a simple

  • yes it’s compliant or 
  • No it’s not compliant– this applies at plan checking stage and on site

It is up to the competent designer to produce a compliant design and the competent builder to build to the approved design.

Enforcement and Penalties

A breach of duties by any dutyholder is a criminal offence. Failure of a duty holder to carry out their duties will be addressed via fines and a custodial sentence up to 2 years.

Once building work is complete

The dutyholders (Client, Principal Designer and Principal Contractor) are to provide a signed compliance declaration within five days of completion of the work confirming:

  • To the best of your (the client’s) knowledge the work complies with the Building Regulations.
  • The Principal Designer and Contractor both have to sign to say they have fulfilled their duties.

Potential pitfall: When a builder wants to make a change to the approved design

If there are design changes from the information declared as compliant by the Principal Designer (and approved by Building Control in their checking role) a competent designer needs to confirm that the design remains compliant.

You (the client) would be responsible for providing the relevant information or seeking assistance (from the Principal Designer) with the design element. 

Alternatively if you felt your builder was a competent designer you would need to declare a change of dutyholder and assign your builder as the new Principal Designer.

What happens once the build is finished?

Before Building control will carry out a final completion inspection, the client, the Principal designer and Principal contractor have to sign a “declaration of compliance” to say they are happy that they have carried out their duties under the act and the build is compliant with building regulations.

What happens if I can’t do this?

Building Control will not be able to issue a completion certificate, which may be an issue when you come to sell your property.

Want to find out more?

Check out the government guidance by clicking here.

If you are thinking of a project (around the Berkshire area) and need advice, please drop us an email at:- support@mapl.co.uk

What is a Certificate of Structural Adequacy?

A Certificate of Structural Adequacy is issued if you have had work completed on your property, typically where you have had subsidence, heave, or landslip. It can also be issued by an independent Chartered Structural Engineer to provide reassurance to the building owner that what has been built, is what was designed.

In the case of subsidence, the certificate of structural adequacy details the causes of the damage, the repair work undertaken and confirms that the work was carried out correctly and that the property is now structurally sound.

Who Usually Issues a Certificate of Structural Adequacy?

Loss adjusters, mortgage providers and insurers normally require the certificate to be issued by a Chartered Member of the Institution of Structural Engineers.

When is a Certificate of Structural Adequacy Issued?

Following completion of any building work and/or structural repairs and (in the case of underpinning) after a period of monitoring.


Is Building Regulations Approval Required for Structural Repairs eg underpinning aswell?

Yes. If you are carrying out underpinning work, under the Building Regulations it is deemed to be “building work” and would require Building Regulation approval.

Can I Get A Retrospective Certificate of Structural Adequacy?

Yes, but you would need to expose all of the structural elements of the build so that the engineer would be able to see that what has been built is correct (eg. as per the engineers’ design drawings), so the best thing is to have the engineer inspect during the works

Why Do I need a Certificate of Structural Adequacy if I have obtained Building Regulations Approval – Building Control Inspect Don’t They?

Building control only inspect a limited number of parts of the build.

The Chartered structural engineer would inspect at regular intervals to check to make sure that his/her design was implemented correctly. The Certificate of Structural Adequacy closes the loop. It makes sure that the builder has built what he has been paid to build.

Does A Certificate of Structural Adequacy Guarantee the Work?

In effect, the structural work will be guaranteed by the chartered engineers’ professional liability insurance. This insurance covers the design and advice provided and with satisfactory inspections it is clear where responsibility lies.  If the builder hasn’t correctly implemented the design, this devalues the benefit of the insurance.

How much does a Certificate of Structural Adequacy Cost?

They can vary from £195+VAT to £295+VAT .

How Much Does Is Cost To Have a Chartered Structural Engineer Oversee The Build?

Again, this can vary, depending on the complexity of the job and hence the number of visits required to ensure the design is correctly implemented.

A Recent Example

This was a small project in Reading, Berkshire but demonstrates what can go wrong when you trust the builder to follow the approved plans, without any independent checks

  • The client obtained Building regulations approval for their project.
  • The builder built what he thought was correct (didn’t follow the drawings).
  • The client was none the wiser, as they didn’t know how to read the drawings.
  • The builder didn’t call out building control to inspect the works (even though there was a building control application and inspections should have been made).
  • Only after the works were completed did the client realise – he hadn’t received anything from building control.
  • Building control confirmed that they hadn’t inspected at all.
  • The client had photographs of the works being carried out, unfortunately, it was clear that the builder had not built to the approved drawings.

How Did the Client Resolve The Matter?

Sadly, this is not yet resolved.

The builder left site with the clients money and the client is left with a bill to sort out, or live with a structural defect and a potentially devalued property (as conveyancing solicitors would typically warn their clients not to buy a property without the final completion certificate). 

The 3 Key Questions To Ask Yourself before You Start Your Project.

  1. Do you understand what those stages are when building control need to inspect?
  2. How are you making sure that the builder is notifying building control to check the work at the right time?
  3. Are you confident doing that?

Are You Having Building Work Carried Out On Your Home?

Would you like an independent engineer to inspect the works as they proceed?

Please contact us today to see how we can help you.

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