Planning · England · Free to use
Nationally Described Space Standard calculator
Minimum gross internal area, storage and bedroom sizes by bedrooms, bedspaces and storeys.
Nationally Described Space Standard (2015)
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Planning · Result
70 m² minimum GIA
2 bedroom, 4 person, 1 storey home.
Check failed- Gross internal area: Checks passedmin 70 m²72 m²
- Built-in storage: Check failedmin 2 m²1.8 m²
- Main double bedroom: Checks passedmin 11.5 m², 2.75 m wide12.4 m² · 2.8 m
- Single bedroom: Check failedmin 7.5 m², 2.15 m wide7.2 m²
- Ceiling height 2.3 m or more: Checks passedmin 75% of GIA100%
- Other double bedrooms: at least 2.55 m wide. Areas under 1.5 m headroom do not count toward GIA.
- Storage between 0.9 and 1.5 m headroom counts at half.
Clauses this relies on
Source edition and scope
Nationally Described Space Standard (2015).
Check the applicable planning policy and dwelling type. Room dimensions, storage and ceiling heights require separate confirmation, including the single-bedroom width stated in the standard.
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.