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Building Regulations and Drawings

Your Building Control Application

What are building regulations?

The building Regulations help ensure the safety and security of house extension London, renovations and new buildings. They are defined by the English and Welsh governments.

There are different Building regulations to clever all aspects of the building such as: structural integrity, fire protection, accessibility, acoustic performance, energy performance, electrical and gas safety.

The secretary of State is advised by the Building Regulations Advisory Committee (BRAC) on making regulations and setting standards for the design and construction of buildings.

Building regulations planning

What work needs to comply with Building Regulations?

Generally speaking the Building Regulations cover buildings major alterations and extensions by architects in London however, some changes of use such as barn conversions are also regulated.

In addition to this, when carrying out alterations to a building you need to make sure that the adjacent fabric is not compromised or that the building performance is worsened by said alterations.

For example, replaced windows or doors should comply with fire and energy efficiency regulations.

Do I Always need Building Regulations?

Building Regulations are not necessary for the erection of a detached single storey building if it’s less than 30 sqm or for the erection of any building less than 15 sqm as long as there is no sleeping accommodation or conservatory extension with and internal floor area less than 30sqm.

Approval for repairs are also not necessary as long as the materials replaced match the existing ones.

architectural building regulation

What is building regulation approval

Obtaining Building regulation approval is a statutory requirement set by the government to insure that buildings are constructed and designed in accordance with the Building Regulations and Associated Legislation. Building regulation approval is the official document stating your project compliance with the Building Regulations and Associated Legislation.


How do I get Building regulation approval?

In order for you to obtain Building Regulations approval you can either use building control services or go through your local authority or an approved inspector.


What is a building notice?

A Building Notice is a statement declaring the address and providing a description of the work, to give Building Control a 48 hours notice of your intention to start work.

This avoids the need to prepare “full plans” and it enables some types of building works to begin quickly with inspections happening as the work progresses.


A building notice is best suited for straight forward projects such as small buildings such as extensions that fall under permitted development.

Using a building notice for a more complex project is risky as there is no insurance that the project complies with Building Regulations.

building regulations


How long is a building notice valid for?

Full plans and building notices are valid for three years from the date they were provided to the local authority. They automatically laps if the building work is not started within that time frame.


What is a completion certificate

Beside having to comply with the Building Regulations you also have to have inspections on site to ensure that.

The inspections lead to a final sign off without which you could be fined up to £5,000 and/or forced to re-do work.


In addition to this, lack of compliance will result in the local authority searches making it impossible to sell the property.


Inspection Stages:


Main inspection points in a build and the notice required (some projects may differ):


Build Stage

Notice required


2 days

Excavation of foundations

1 day

Foundation laid

1 day

Oversite preparation

1 day

Damp proof course

1 day

Drains testing

1 day

Occupation prior to completion

Within 5 days of occupation


Within 5 day of occupation



We have Building Regulations experience in all the London boroughs.

Featured Case Study:
Our Secret

Take a peek at our designs for “Our Secret” in Westbourne Grove. This client’s application has now been recommended for approval by the planning officer.

See Full Case Study

More Building Regulations Projects


What can 3D Visualisation do for your project?

All building work is to some degree collaborative, and our work is designed to fit in with this process, providing a valuable resource to project managers and building professionals. Just as drawing provide the basis for 3D visualisations, so the reverse is true, and we can use our renderings as the basis for extracting accurate plans for on-site reference.

See Full Case Study

Your Building Regulations Drawings

We can fortify your application by including in the drawings the following details:

  • Acoustics
  • Fire escapes
  • Sanitaryware
  • Thermal detailing
  • Foundations
  • Steels
  • Insulation
  • Building materials
  • Natural light
  • Ventilation
  • Structural safety
  • Damp-proofing

Builders can usually quote from planning drawings and some can work from building regulations drawings. If your builder requests electrical detail we can also prepare construction drawings for them. Just ask us when you call.

Some of our architectural designers
are specialists in creating
Building Regulations drawings.

All Case Studies

The Whole Process

We can manage the entire process on your behalf, from the application & drawings to approval. The local authority’s Building Control department, or a private certified approved building inspector, will check the building regulation drawings to ensure they comply with current UK regulations. Once the drawings have been approved, the Building Control inspector or the approved inspector will visit the construction site at critical stages of the build to ensure that the building work carried out is to a sufficient standard of safety and with appropriate materials.

The outcome of building regulation drawings

At the end of construction, the building inspector will visit the site with a view to issuing a final completion certificate to prove that all works completed complied to the UK regulations. The building inspector has the power to refuse the completion certificate if the building work does not comply with all the essential requirements. It is therefore vital that you choose a company which has good experience with Building regulation rules to ensure that your project is issued with a completion certificate.

Our Expertise

At Extension Architecture, we can help you with your or loft conversion London with Building Regulations for extensions. As well as home extensions we work on large scale new-build developments, flat conversions, HMOs; to gain approval from your local Building Control department for your project.

Begin your Residential Project

Let us get you on the right track with our expert consulting right from the beginning of your proposal concept (we can also prepare conservatory planning permission; extension or loft conversion plans and establish whether you need loft conversion planning permission or if it can be done under Permitted Development). You can become familiar with pricing and the process for planning and design which will give you peace of mind and save you time and unnecessary costs, as we help you prepare your extension Building Regs drawings.

Do you need help with your applications for both Planning and Building Control? Call Extension Architecture to discuss Building Regulations for Extensions, or visit our FAQ page on Building Regulations for more information. We can help you with your planning or building control application. Give us a call today: 0203 409 4215.

We can make your building regulations drawings for you

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