This is a legacy version of the WELL Building Standard. Please check the latest version here.

Right to light

Exposure to adequate levels of sunlight can greatly benefit psychological health. Proximity to large windows, outdoor views and daylight in indoor spaces are some of the most sought-after elements of design. As such, buildings should utilize daylight as a primary source of lighting to the greatest extent possible.

To ensure that daylight is maximized within buildings, this feature sets minimum dimensions for window openings, and minimum distances from windows to regularly occupied spaces.

Part 1: Lease Depth

The lease depth (distance between the building core and the exterior façade) maintains the following dimensions:

a. Does not exceed 7.5 m [25 ft] for 75% of the area for all regularly occupied spaces.
Part 1: Bulk Water – Exterior Management

The following requirement is met:

a. A continuous drainage plane—weather-resistive barrier (WRB) integrated with flashing systems at penetrations—is constructed interior to the exterior cladding.
Reproductive
Immune
Endocrine
Lymphatic
Cardiovascular
Muscular
Nervous
Digestive

Applicability Matrix

Core & Shell Tenant Improvement New Construction
Part 1: Lease Depth O O O
Part 1: Bulk Water – Exterior Management P O P
Commercial Kitchen Schools Multifamily Residential Restaurant Retail
Part 1: Lease Depth O O P O O
Part 1: Bulk Water – Exterior Management P P P P O

Verification Methods Matrix

Letters of Assurance Annotated Documents On-Site Checks
PART 1 (Design)
Lease Depth
Architectural Drawing Spot Check
PART 1 (Design)
Bulk Water – Exterior Management
Architect