# Standard Room Data Reference A quick-reference compilation of standard room dimensions, occupancy densities, environmental requirements, and servicing allowances for common building types. These values are drawn from UK, European, and international standards and are intended as design starting points — always verify against current regulations, local planning requirements, and project-specific briefs. --- ## Table of Contents - [Occupancy Densities](#occupancy-densities) - [Room Heights](#room-heights) - [Standard Room Dimensions](#standard-room-dimensions) - [Sanitary Provision](#sanitary-provision) - [Environmental Requirements by Space](#environmental-requirements-by-space) - [Structural Loading by Use](#structural-loading-by-use) - [Car Parking Dimensions](#car-parking-dimensions) - [Accessibility Reference Dimensions](#accessibility-reference-dimensions) - [See Also](#see-also) --- ## Occupancy Densities ### Office | Type | Area per Person (NIA) | Standard | |------|----------------------|---------| | Cellular office | 10-12 m²/person | BCO Guide to Specification | | Open-plan (standard) | 8-10 m²/person | BCO | | Open-plan (densified/agile) | 6-8 m²/person | BCO | | Trading floor | 5-7 m²/person | — | | Hot-desking / activity-based | 6-8 m² per desk (at 0.7-0.8 desk:person ratio) | Emerging practice | ### Residential | Dwelling | Occupancy | Standard | |----------|-----------|---------| | Studio/1b1p | 1 person | NDSS | | 1 bed / 1b2p | 2 persons | NDSS | | 2 bed / 2b3p | 3 persons | NDSS | | 2 bed / 2b4p | 4 persons | NDSS | | 3 bed / 3b5p | 5 persons | NDSS | | 3 bed / 3b6p | 6 persons | NDSS | ### Other Building Types | Use | Density (m²/person) | Standard | |-----|---------------------|---------| | Retail — department store | 2-5 | BS 9999 | | Retail — supermarket | 2-5 | BS 9999 | | Restaurant — dining | 1.0-1.5 | BS 9999 | | Bar / nightclub | 0.5-1.0 | BS 9999 | | Assembly — fixed seating | Per seat layout | BS 9999 | | Assembly — standing/dance | 0.5 | BS 9999 | | Classroom | 1.8-2.2 (primary); 2.0-2.5 (secondary) | BB103 | | Lecture theatre | Per seat layout | — | | Museum / gallery | 3-5 | — | | Hotel bedroom | Per room (1.5-2 guests) | — | | Hospital ward | Per bed (6-12 m² per bed space) | HBN guidance | | Gym / fitness | 4-5 | — | | Library — reading | 2.5-4.5 | — | | Place of worship | 0.5-1.0 | BS 9999 | --- ## Room Heights ### Minimum and Recommended Ceiling Heights | Space | Minimum (m) | Recommended (m) | Notes | |-------|-------------|-----------------|-------| | Residential — habitable room | 2.3 (UK) | 2.5-2.7 | 2.4m minimum for new-build (NDSS) | | Office — general | 2.5 | 2.7-2.85 | Clear of luminaires and services | | Office — Grade A | 2.7 | 2.85-3.0 | BCO specification | | Retail — general | 3.0 | 3.5-5.0 | Depends on store type | | Classroom | 2.7 | 3.0 | BB103 | | Hospital ward | 2.7 | 3.0 | HBN | | Restaurant | 2.7 | 3.0-4.0 | Higher for atmosphere | | Hotel bedroom | 2.4 | 2.7 | Net of services zone | | Car park | 2.1 (clear) | 2.4-2.6 | 2.6m at ramps and accessible bays | | Sports hall (4-court) | 7.6 (clear) | 7.6 | BB103 / Sport England | ### Floor-to-Floor Heights (Total) | Building Type | Floor-to-Floor (m) | Breakdown | |--------------|--------------------|-----------| | Residential | 2.85-3.15 | 2.5m ceiling + 0.35-0.65m structure/services | | Office (standard) | 3.6-3.9 | 2.7m ceiling + 0.4-0.6m services + 0.5m structure | | Office (Grade A) | 3.9-4.2 | 2.85m ceiling + 0.5-0.7m services + 0.55m structure | | Hotel | 3.2-3.6 | 2.7m ceiling + 0.5-0.9m services/structure | | Hospital | 4.0-4.5 | 3.0m ceiling + 1.0-1.5m services zone | | Car park | 3.0-3.3 | 2.4m clear + 0.6-0.9m structure | | Retail | 4.0-5.5 | 3.5m+ ceiling + 0.5-2.0m services | --- ## Standard Room Dimensions ### Office | Space | Area | Dimensions | Notes | |-------|------|-----------|-------| | 2-person meeting room | 6-8 m² | 2.5 × 3.0m | Table + 2-4 chairs | | 4-person meeting room | 10-12 m² | 3.0 × 3.5m | | | 8-person meeting room | 16-20 m² | 4.0 × 4.5m | | | 12-person boardroom | 25-35 m² | 5.0 × 6.0m | | | Private office (1 person) | 10-15 m² | 3.0 × 4.0m | | | Director's office | 15-25 m² | 4.0 × 5.0m | Meeting area within | | Tea point / pantry | 4-8 m² | — | Per floor or wing | | Print/copy room | 6-10 m² | — | Per floor | | Server/comms room | 6-15 m² | — | Air-conditioned; per floor | ### Hotel | Space | Area | Notes | |-------|------|-------| | Standard double room | 22-26 m² | 3-star; excluding bathroom | | Standard double (with bathroom) | 28-32 m² | 3-star | | Superior room | 30-38 m² | 4-star | | Suite (junior) | 40-55 m² | Living + bedroom | | Suite (executive) | 55-80 m² | Separate living room | | Bathroom (standard) | 4.5-6.0 m² | Bath or walk-in shower | | Corridor width | 1.5-1.8m | Minimum 1.5m | | Room depth | 4.5-5.5m | Window to corridor wall | | Room width | 3.6-4.5m | Per standard room module | ### Healthcare | Space | Area | Standard | |-------|------|---------| | Single patient bedroom | 17-22 m² | HBN 04-01 (2022) | | Multi-bed bay (4 beds) | 60-72 m² | HBN 04-01 | | Consulting / examination room | 16-18 m² | HBN 00-03 | | Operating theatre (general) | 42-55 m² | HBN 26 | | Treatment room | 16-20 m² | HBN | | Dirty utility | 8-12 m² | Per ward | | Clean utility | 10-14 m² | Per ward | | Staff base / nurses' station | 12-20 m² | Per ward | --- ## Sanitary Provision ### Office (BS 6465-1) | Fixture | Male (per persons) | Female (per persons) | |---------|-------------------|---------------------| | WC | 1 per 25 | 1 per 13 | | Urinal | 1 per 25 | — | | WHB | 1 per 25 | 1 per 25 | | Accessible WC | 1 per floor (minimum) | 1 per floor (minimum) | ### Education (BB99) | Fixture | Primary (per pupils) | Secondary (per pupils) | |---------|---------------------|----------------------| | WC (boys) | 1 per 20 | 1 per 20 | | WC (girls) | 1 per 13 | 1 per 13 | | Urinal (boys) | 1 per 20 | 1 per 20 | | WHB | 1 per 20 | 1 per 20 | ### Assembly / Public Buildings Higher provision rates apply — typically 1 WC per 50-100 persons for assembly use. Refer to BS 6465-1 for detailed requirements by building type. --- ## Environmental Requirements by Space | Space | Temp (°C) | Fresh Air (l/s/person) | Illuminance (lux) | Noise (NR/dB LAeq) | |-------|-----------|----------------------|-------------------|-------------------| | Office — general | 21-23 (winter); 23-25 (summer) | 10 | 300-500 | NR 35-40 | | Classroom | 19-21 | 8-10 | 300-500 | 35 dB LAeq | | Hospital ward | 22-24 | 10 | 100 (general); 300 (exam) | NR 30-35 | | Hotel bedroom | 19-22 | 10/room | 100-200 | NR 25-30 | | Restaurant | 20-22 | 10 | 150-300 | NR 35-40 | | Retail | 19-21 | 10 | 300-500 | NR 40-45 | | Residential — living | 21-23 | Per Part F | 150-300 | 35 dB LAeq | | Residential — bedroom | 17-20 | Per Part F | 100 | 30 dB LAeq | | Sports hall | 13-16 | Variable | 300-500 | NR 40-50 | | Swimming pool | 27-30 | High (humidity control) | 300 | NR 40-50 | For detailed environmental standards, see [[HVAC Fundamentals]], [[Electrical Distribution in Buildings]], and [[Acoustic Design Fundamentals]]. --- ## Structural Loading by Use | Use | Imposed Load (kN/m²) | Standard | |-----|----------------------|---------| | Residential (domestic) | 1.5 | BS EN 1991-1-1 | | Office — general | 2.5 | BS EN 1991-1-1 | | Office — filing/storage | 5.0 | BS EN 1991-1-1 | | Classroom | 3.0 | BS EN 1991-1-1 | | Retail — general | 4.0 | BS EN 1991-1-1 | | Assembly — fixed seating | 4.0 | BS EN 1991-1-1 | | Assembly — standing | 5.0 | BS EN 1991-1-1 | | Hospital — ward | 2.0 | BS EN 1991-1-1 | | Hospital — operating theatre | 3.0 | BS EN 1991-1-1 | | Plant rooms | 7.5 | BS EN 1991-1-1 | | Car park (≤30kN vehicle) | 2.5 | BS EN 1991-1-1 | | Sports hall | 5.0 | BS EN 1991-1-1 | | Balcony | 2.5-4.0 (depending on use) | BS EN 1991-1-1 | --- ## Car Parking Dimensions | Bay Type | Width (m) | Length (m) | Notes | |----------|-----------|-----------|-------| | Standard bay | 2.4 | 4.8 | UK minimum; 2.5 × 5.0m preferred | | Accessible bay | 3.6 (bay + transfer zone) | 6.0 | Hatched transfer zone 1.2m | | Parent and child | 3.2 | 5.0 | Wider for door opening | | Electric vehicle | 2.4 | 4.8 | Charge point within 1m | | Motorcycle | 1.2 | 2.3 | | | Aisle width (perpendicular) | 6.0 | — | Two-way traffic | | Aisle width (angled 45°) | 3.6-4.2 | — | One-way circulation | | Headroom (general) | 2.1m clear | — | 2.3m at accessible bays | | Ramp gradient | 1:10 max (10%) | — | 1:5 max for short ramps; transitions at top/bottom | --- ## Accessibility Reference Dimensions | Element | Dimension | Standard | |---------|-----------|---------| | Wheelchair turning circle | 1,500mm diameter | BS 8300; Part M | | Wheelchair passing width | 1,800mm | BS 8300 | | Corridor (wheelchair access) | 1,200mm minimum; 1,500mm preferred | Part M | | Door clear opening | 850mm minimum; 900mm preferred | Part M | | Ramp gradient (max) | 1:12 (8.3%); 1:20 (5%) preferred | Part M; BS 8300 | | Ramp width | 1,500mm minimum (1,800mm between handrails) | Part M | | Handrail height | 900-1,000mm (ramps); 900-1,100mm (stairs) | Part M | | Reception counter | 760mm high section (750mm minimum) | Part M | | Switch/socket zone | 450-1,200mm AFL | Part M | | Lift car (minimum accessible) | 1,100 × 1,400mm | EN 81-70 | | Accessible WC | 1,500 × 2,200mm minimum | Part M; BS 8300 | For comprehensive accessibility guidance, see [[Universal Design Principles]]. --- ## See Also - [[Unit Conversion Tables]] - [[Material Weight Tables]] - [[Office Building Design]] - [[Hospital Design Principles]] - [[School Design Principles]] - [[Residential Design Principles]] - [[HVAC Fundamentals]] - [[Elevator and Escalator Design]] --- #reference #roomdata #dimensions #standards #occupancy #tables