# Residential Design: Ventilation, Parking & Safety Guidelines
> A regulatory guide for Singapore residential projects covering ventilation requirements, parking dimensions, fire safety egress, and BCA accessibility codes.

Tags: architecture, building-codes, singapore-property, ventilation-design, parking-specs, fire-safety, accessibility-code, bca-compliance
## Residential Project Requirements: Ventilation, Parking & Safety
*   Overview of regulatory guidelines for Landed & Terrace developments in Singapore.
*   Key authorities: BCA (Structure/Ventilation), SCDF (Fire Safety/Shelters), and URA (Setbacks/Parking).

## Natural Ventilation: Habitable Rooms
*   Minimum opening area for natural ventilation in bedrooms/living rooms: 10% of floor area.
*   Openings must face external spaces like sky terraces or balconies.

## Ventilation: Wet Areas & Facilities
*   Toilets/Bathrooms: Require natural or mechanical ventilation independent of habitable rooms.
*   Basement Car Parks: Require Mechanical Ventilation (MV) with CO sensors.
*   Household Shelters: Specific ventilation sleeves required for peacetime use.

## Parking Quantity & Layout Dimensions
*   Provision: Typically 1 lot per dwelling unit for landed housing.
*   Standard Car Lot: 2.4m x 4.8m.
*   Accessible (PWD) Lot: 3.6m x 4.8m (includes 1.2m buffer zone).
*   Motorcycle Lot: 0.8m x 2.4m.

## Safety: Storey Shelter Setbacks & Egress
*   Collapse Zone: Shelters must be set back (often min 6m) to ensure integrity if adjacent structures fail.
*   Roof Terrace Egress: Max travel distance of 15m (single exit) or 30m-60m (multiple exits).
*   Internal Travel Distance: Max 15m (unsprinklered) or 25m (sprinklered) from the most remote point to the unit entrance.

## Accessibility: Unit Entrances
*   Barrier-Free Entrances: Thresholds max 25mm (beveled).
*   Ramps: Required for level changes >25mm; max gradient 1:12.
*   Door Width: Minimum 850mm clear opening width.
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