Last edited 21 Dec 2020

Main author

Saliha AIT HAMOUDI Engineer Website

BREEAM Maximum car parking capacity


[edit] Aim and benefits

This issue was established in order to encourage the use of alternative modes of transport (other than private cars) to and from one building, thereby helping to reduce transport-related emissions and traffic congestion associated with the building’s operation.

The aims of this issue are:

It is related to the non-residential and residential institutions only.

[edit] When to consider

Prefer to Locate a building in high density area, with a high quality transit.

In a rural area with no public transportation services, this issue is hard to achieve.

[edit] Step by step guidance

  1. Define with the client/designer the predicted number of building users. For hotels and similar types of building with large amount of guests/visitors define the numbers for staff and visitors.
  2. Calculate the total number of relevant parking spaces (for calculation guidance see part "Tips and Best practice" below).
  3. For BREEAM Intl. NC 2016 calculate the Accessibility Index (AI, see issue Tra 01) to get the required ratio for credits achievement as listed in the Table 36 "Credits available in Tra 04 Maximum car parking capacity for different building types"

(For BREEAM UK NC 2014 the Table 36 is different, please see the issue in UK 2014 manual)

Table 36 - Credits available for different building types, based on AI and the people/parking ratio Building type

4. Calculate the people/parking ratio: divide number of building users with total number of parking places.

When result is a fraction of a whole number round it down to the next whole number.

  • Example:
  1. Office building with Accessibility index 6, total number of building users 1 000, total number of relevant parking places 185:

1 000 / 185 = 5.405 ......... rounded to 5......... 2 credits achieved

  1. The same building with the same number of users and parking places, but in locality with Accessibility index 8 or more, only 1 credit is achieved.

Definitions (BREEAM Intl. NC 2016) :

[edit] Questions to ask while seeking compliance

Is parking space needed for this project?

Can we reduce the number of parking space given in the client requirement program?

Does the local regulation imposes a requirement related to minimum parking spaces to provide?

For BREEAM Intl. NC 2016 or BREEAM UK NC 2014 - what is the Accessibility Index of this development? (defining the ratio required for credits achievement)

[edit] Tools and resources

BREEAM Knowledge base

[edit] Tips and best practice

Are excluded to the calculation of the total number parking spaces, parking spaces dedicated to :

Included in the calculation are:

NOTE: For buildings with a relatively small number of staff and large visitor numbers (hotels etc.) the guest/visitor car parking spaces do not need to be assessed where these are separate from the staff parking spaces. If combined and not clearly segregated, then all spaces must be accounted.(KBCN 0242)

NOTE: For campus or similar development where parking is not designated to individual buildings, the compliance is proved EITHER
- on the basis of parking capacity for the whole development, accounting for all existing and new users and parking spaces OR
- using a pro-rata of parking capacity to building users, e.g. if the assessed building is occupied by 20% of the development's total occupants, then attribute 20% of the total parking spaces to the assessed building for the purpose of the assessment

If the client doesn't know at the early stages the number of building users then we can consider the maximum building users capacity that can be provided in the fire risk assessment.

[edit] Typical evidence

[edit] Applicable Schemes

The guidelines collated in this ISD aim to support sustainable best practice in the topic described. This issue may apply in multiple BREEAM schemes covering different stages in the life of a building, different building types and different year versions. Some content may be generic but scheme nuances should also be taken into account. Refer to the comments below and related articles to this one to understand these nuances. See this document for further guidelines.

BRE Global does not endorse any of the content posted and use of the content will not guarantee the meeting of certification criteria.

--Saliha AIT HAMOUDI 11:23, 20 Nov 2017 (BST)

--Sandra Turcaniova 12:00, 21 Mar 2018 (BST)


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