Part M · England · Free to use
M4(2) and M4(3) dimensions checker
Check door widths, corridors, approach route and turning space against the accessible and wheelchair dwelling categories.
Approved Document M Volume 1 (2015, including 2016 amendments)
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Part M · Result
Meets M4(2) dimensions checked
A dimensions check only. Bathrooms, kitchens, lifts and services have further rules.
Checks passed- Approach route width: Checks passedmin 900 mm (para 2.9)900 mm
- Approach route gradient: Checks passedbetween 1:20 and 1:12 (para 2.10)1:15
- Entrance door clear width: Checks passedmin 850 mm (para 2.20)850 mm
- Hall and landing width: Checks passedmin 900 mm (para 2.22)1,050 mm
- Door against corridor: Checks passed775 mm door, not head-on: corridor min 1050 mm (Table 2.1)1,050 mm
- A standard 826 mm leaf up to 44 mm thick counts as 775 mm clear (Table 2.1 note 3).
- M4(3) level-access shower: 1,200 × 1,200 mm (1,000 × 1,000 mm in a WC or cloakroom).
Clauses this relies on
Source edition and scope
Approved Document M Volume 1 (2015, including 2016 amendments).
This is a preliminary check of the conditions shown. Confirm the edition, project circumstances and any additional requirements with your architect or building control.
A design aid, not legal advice. Checked against the Building Regulations 2010 for England; confirm with building control.