How to measure storeys

How to measure storey heights

A storey is defined as the space between two consecutive floors or a floor and a roof. The number of storeys should be counted from the lowest external ground level. Figures 1 shows an example of a 5 storey building as the ground floor is counted as a storey.

Please note, this is only in relation to our Warranty guidance and not for using in connection with Building Regulation assessments. (For Building Regulation queries, advice should be sought from the Building Control Body.)

How this affects our Technical Manual

The guidance within the Technical Manual is primarily for low rise construction and in the introduction page of our Technical Manual, we define low rise construction as: ‘Buildings of 5 storey or lower – including the ground floor level’.  

So in simple terms that is: - Ground, 1st, 2nd, 3rd, 4th floors, see figure 1 on the next page for a visual explanation.

When do our engineers need to be involved?

The number of storeys for a given development will also trigger when a structural referral will need to be carried out by our Engineers.  For a full list of situations where a structural referral is required and for the most up to date guidance on structural referrals, please refer to the Operations and Guidance Manual.

Examples include but not exclusive:

  • 4 and 5 storey buildings on bored piles (Automatically referred from CSU)
  • 5 storey buildings (Automatically referred from CSU)
  • Framed structures on buildings of 4 storeys or more. (Manual referrals by RMS)

Figure 1

Visual explanation for counting stories

  1. Notes: Our Major Projects team get involved at 6 storeys and above
  2. For Warranty purposes: To count the number of storeys in a building, count only at the position which gives the greatest number and exclude any basement storeys. (Building Regulations have an additional guidance for separated buildings)

Note:

To count the number of stories in a building or separated part of a building, count only at the position which gives the greatest number and exclude any basement storeys.

 

When do the Major Projects Service need to be involved?

Our Major Projects team get involved at 6 storeys and above.

Measuring storeys

This article will explore how to measure the number of storeys and how this effects the Technical Manual, when our Engineers need to be involved with your project and when the Major Projects team need to be involved.

Download a PDF copy of this guidance.

Download a PDF version of this guidance

Download PDF

Every care was taken to ensure information in this article was correct at the time of writing (May 2023). Guidance provided does not replace the reader’s professional judgement and any construction project should comply with the relevant building regulations or applicable technical standards. For the most up to date LABC Warranty technical guidance please refer to your risk management surveyor and the latest version of the LABC Warranty Technical Manual.

Related Articles

New homes built alongside or attached to existing homes

Considerations and recommendations for building new homes attached to existing homes within warranty requirements.
Read More

Warranty requirements for vertically stacked coupled window assemblies

Warranty requirements for vertically stacked coupled window assemblies including testing, structural integrity, and more.
Read More

Using cavity trays at DPC level for timber frame construction

Guidance on the use of cavity trays at DPC level in timber frame construction, and how they can impact drainage and ventilation...
Read More