Flat Size Calculator
Enter the number of bedrooms and the number of people the flat is for. The calculator gives the minimum floor area, the built-in storage and the bedroom sizes from the UK space standard.
- Minimum size
- Storage
- Bedrooms
A double bedroom sleeps two people, a single sleeps one.
Minimum flat sizes grow with bedrooms and people. A 2 bedroom flat for 4 people must be at least 70 m², about 753 sq ft, with 2 m² of built-in storage and two double bedrooms of at least 11.5 m² each.
Minimum flat size chart
One storey, UK space standard. Search for a flat.
| Flat | People | Minimum (m²) | Minimum (sq ft) | Storage (m²) |
|---|---|---|---|---|
| 1 bed | 1 | 37 | 398 | 1 |
| 1 bed | 2 | 50 | 538 | 1.5 |
| 2 bed | 3 | 61 | 657 | 2 |
| 2 bed | 4 | 70 | 753 | 2 |
| 3 bed | 4 | 74 | 797 | 2.5 |
| 3 bed | 5 | 86 | 926 | 2.5 |
| 3 bed | 6 | 95 | 1023 | 2.5 |
| 4 bed | 5 | 90 | 969 | 3 |
| 4 bed | 6 | 99 | 1066 | 3 |
| 4 bed | 7 | 108 | 1163 | 3 |
| 4 bed | 8 | 117 | 1259 | 3 |
m².
People and flat
Two people per bedroom. Slide the people.
The plan shows bedrooms and living space.
How to size a flat
Bedrooms to m². Step through it.
Bedrooms
Count.
Check your local planning rules too.
Studio, one bed or two bed
Flat types. Compare them.
1 person.
2 people.
4 people.
A second bedroom adds about 11 to 20 m² to the minimum.
Before you buy or build
Flat checks. Tick each item.
Tick each item as you go.
Measure rooms yourself rather than trusting listings.
What you get
Flat sizing. Each tile explains one result.
m² and sq ft.
Built in.
Double and single.
Height.
Bigger size.
Room sizes on listings often include hallways and cupboards.
Frequently Asked Questions
No question matches that search.
What is the minimum size for a one bed flat?
Fifty square metres for two people in the UK space standard.
How big is a two bedroom flat?
At least sixty one square metres for three people, seventy for four.
What is the minimum studio size?
Thirty seven square metres with a shower, thirty nine with a bath.
How big must a double bedroom be?
At least eleven and a half square metres.
How big must a single bedroom be?
At least seven and a half square metres.
Does every council use the space standard?
Many do, especially London. Check your local plan.
How much storage does a flat need?
About one to three square metres built in, by size.
Room to live
Check a flat against the space standard and know it has room for everyone who will live there.
More size calculators
Each one has its own calculator, worked examples and answers to common questions.