Do I Need Structural Calculations for My Extension in Kent?

If you’re planning a home extension anywhere in Kent, one of the most common questions is:

Do I actually need structural calculations?

The short answer: almost always, yes.

Structural calculations are required to demonstrate that your building works are safe, stable, and compliant with Building Regulations.

When structural calculations are needed

You will typically need calculations if your project involves:

• Removing a load-bearing wall
• Installing steel beams (RSJs)
• Building a rear or side extension
• Converting your loft
• Altering roof or floor structures
• Constructing a new build or large outbuilding

Even relatively simple projects — like creating an open-plan kitchen — will require structural input.

Required by Building Control across Kent

Whether your project is in Maidstone, Medway, Canterbury or Ashford, Building Control will require structural calculations before approving your project.

Without them:

• Your application may be delayed
• Builders may not be able to proceed
• You risk non-compliant construction

What do structural calculations include?

A typical structural package will cover:

• Steel beam sizing (RSJs)
• Load calculations
• Foundation design
• Structural layouts and notes
• Supporting sketches where required

These are submitted alongside your Building Regulations drawings.

When should you get them done?

The best time is immediately after your planning drawings are finalised (or straight away for Permitted Development projects).

This allows you to:

• Move quickly into Building Regulations
• Get accurate builder quotes
• Avoid delays on site

Keep your project moving

At Architechnology.Design, we now provide in-house structural calculations across Kent, helping you move from design to construction without delays.

If you’re unsure whether you need calculations, feel free to send your plans over — we’ll point you in the right direction.