# Multi-Family Housing Design Multi-family housing encompasses all residential buildings containing multiple dwelling units sharing common structure, circulation, or site — from walk-up flats and maisonettes to slab blocks and point towers. Designing quality multi-family housing requires balancing density with amenity, privacy with community, and efficiency with spatial generosity. The architect must master unit planning, core design, daylighting, acoustic separation, and the creation of a sense of home within a shared building. --- ## Table of Contents - [Housing Typologies](#housing-typologies) - [Unit Layout Design](#unit-layout-design) - [Core and Circulation Design](#core-and-circulation-design) - [Daylighting and Ventilation](#daylighting-and-ventilation) - [Communal Spaces](#communal-spaces) - [Density and Site Planning](#density-and-site-planning) - [Parking and Servicing](#parking-and-servicing) - [See Also](#see-also) --- ## Housing Typologies | Typology | Storeys | Access | Character | |----------|---------|--------|-----------| | **Walk-up** | 3–5 | Stair-only, 2–4 units per landing | Low-rise, no lift requirement | | **Corridor access** | 4–15+ | Central or side corridor | Efficient but single-aspect units possible | | **Gallery access** | 4–10 | Open external corridor | Dual-aspect units, cost-effective | | **Scissor section** | 6–12 | Alternating corridor levels | Dual-aspect with fewer corridors | | **Deck access** | 5–15 | Wide deck as street-in-the-sky | Social interaction, less privacy | | **Point tower** | 10–50+ | Central core, units radiate | Views, wind exposure, complex cores | | **Slab block** | 8–25 | Corridor or gallery | High density, repetitive layouts | | **Maisonette** | 2 (within block) | Internal stair within unit | House-like quality in apartment block | --- ## Unit Layout Design ### Minimum Space Standards | Unit Type | UK (NDSS) m² | Bedroom Area (min) | |-----------|-------------|-------------------| | Studio (1p) | 37 | — (combined living/sleeping) | | 1 bed (2p) | 50 | 11.5 m² (double) | | 2 bed (3p) | 61 | 11.5 + 7.5 m² | | 2 bed (4p) | 70 | 11.5 + 7.5 m² | | 3 bed (5p) | 86 | 11.5 + 7.5 + 7.5 m² | | 3 bed (6p) | 95 | 11.5 + 11.5 + 7.5 m² | ### Layout Principles | Principle | Application | |-----------|-------------| | **Living spaces to light** | Locate living rooms and bedrooms on external walls | | **Wet rooms grouped** | Kitchens and bathrooms share service risers | | **Entrance buffer** | Hallway provides acoustic and visual privacy from corridor | | **Storage** | Built-in storage: 1.5 m² (1-bed) to 3.0 m² (3-bed) minimum | | **Flexibility** | Open-plan living/kitchen; adaptable bedroom/study | | **Private outdoor space** | Balcony/terrace: minimum 5 m² (1-bed), 7–9 m² (2–3 bed) | | **Ceiling height** | Minimum 2.5m floor-to-ceiling (2.6m preferred for daylight penetration) | --- ## Core and Circulation Design | Core Type | Units Served | Efficiency | Dual Aspect | |-----------|-------------|------------|-------------| | **Single stair + lift** | 4–8 per floor | High | Possible (corner units) | | **Double-loaded corridor** | 8–20 per floor | Very high | Difficult | | **Single-loaded corridor** | 4–10 per floor | Lower | Yes (all units) | | **Gallery** | 4–10 per floor | Medium | Yes | | **Scissor** | 6–12 per floor | High | Yes (skip-stop floors) | ### Core Design Standards | Element | Requirement | |---------|-------------| | Stair width | Minimum 1100mm (residential, UK) | | Lift | Required above 4 storeys; wheelchair-accessible minimum 1100×1400mm | | Corridor width | Minimum 1200mm (1500mm for wheelchair passing) | | Travel distance | Maximum 7.5m (single direction), 30m (two directions) to stair | | Refuse | Chute or bin store on each floor or at ground | | Post | Secure mail boxes at ground-floor lobby | --- ## Daylighting and Ventilation | Strategy | Description | |----------|-------------| | **Dual aspect** | Units with windows on two or more facades — superior daylight and cross-ventilation | | **Single aspect** | Units with windows on one facade only — maximum 8m depth recommended | | **Corner units** | Two adjacent facades — good daylight, cross-ventilation possible | | **Lightwells/courtyards** | Internal courts providing light to deep-plan buildings | | **Setbacks** | Upper floors set back to improve daylight to lower units | ### Daylight Standards | Metric | Target | |--------|--------| | Average Daylight Factor (ADF) | ≥2% living rooms, ≥1.5% bedrooms, ≥2% kitchens (BS 8206-2) | | Sunlight hours | ≥1.5 hours direct sun on 21 March to living rooms (BRE 209) | | No-sky line | Minimum 50% of room area should see sky from window | --- ## Communal Spaces | Space | Purpose | Location | |-------|---------|----------| | **Entrance lobby** | Security, post, wayfinding | Ground floor | | **Communal garden** | Outdoor amenity, play, socialising | Courtyard, roof, ground | | **Residents' lounge** | Shared social space | Ground or upper floor | | **Co-working/study** | Remote working, study | Ground or first floor | | **Play area** | Children's play | Courtyard, podium, roof | | **Cycle storage** | Secure, accessible cycle parking | Ground floor or basement | | **Bin store** | Refuse and recycling | Ground floor, ventilated | | **Plant rooms** | MEP equipment, risers | Basement or roof | --- ## Density and Site Planning | Density (dph) | Form | Typical Height | |---------------|------|---------------| | 50–80 | Walk-up apartments, maisonettes | 3–5 storeys | | 80–150 | Mid-rise apartment blocks | 5–8 storeys | | 150–250 | High-rise slab or tower | 8–15 storeys | | 250–400 | Dense urban towers | 15–30+ storeys | ### Site Planning Principles | Principle | Application | |-----------|-------------| | Orientation | Long axis east-west; living rooms facing south | | Privacy distances | 18–21m between facing habitable room windows | | Wind mitigation | Stagger tall buildings; podium bases reduce downdrafts | | Overlooking | Angled facades, offset windows, privacy screens | | Shared landscape | Central courtyards, roof gardens, pocket parks | See [[Urban Density and Form]] and [[High Rise Residential Design]] for further guidance. --- ## Parking and Servicing | Strategy | Description | |----------|-------------| | **Basement parking** | Below building; expensive but land-efficient | | **Podium parking** | Screened parking at ground/first floor with development above | | **Surface parking** | At-grade; low-density sites only | | **Car-free development** | Zero or minimal parking; reliant on public transport | | **Car share** | Shared vehicles reduce parking demand | | **Cycle-first** | Prioritise secure cycle storage over car parking | Parking ratios vary by location: 0.0–0.5 spaces/unit (urban), 0.5–1.0 (suburban), 1.0–2.0 (rural). --- ## See Also - [[High Rise Residential Design]] - [[Affordable Housing Design]] - [[Urban Density and Form]] - [[Sound Insulation Design]] - [[Daylighting Fundamentals]] - [[Fire Safety Building Regulations]] - [[Universal Design Principles]] --- #housing #residential #multi-family #apartments #density #core-design #building-typologies