Cal. Civ. Code § 5:10-16.1
Natural light
Operative Text
(a) Every habitable room shall have at least one window or skylight or transparent or translucent panel facing the exterior of the premises directly or through an open porch into the room, equal in area to at least eight percent of the floor area of such room. (b) Wherever walls or other portions of a structure or other opaque barriers face a window surface and are less than three feet distant from such window surface and where the projected plane of any such wall, surface or barrier shall obscure more than one half of the window surface, then such shall not be included in the calculation as contributing to meet the minimum requirements hereof.
N.J.A.C. § 5:10-16.1 establishes that every habitable room in a residential dwelling must receive natural light through at least one window, skylight, or translucent panel that opens to the exterior, with that opening covering no less than eight percent of the room's floor area. The rule also addresses situations where nearby walls or barriers block a window: if an opaque structure is closer than three feet from the window and obscures more than half of its surface, that window cannot be counted toward meeting the minimum light requirement. In effect, the provision ensures that natural light in habitable rooms is genuine and unobstructed, not merely nominal.
Plain English — not legal advice.
Property owners and managers subject to N.J.A.C. § 5:10-16.1 generally verify that each habitable room contains qualifying window or skylight area equal to at least eight percent of that room's floor area before renting or renovating. Compliant operators also account for the proximity rule: windows blocked by walls or barriers within three feet that obscure more than half the window surface are excluded from the calculation, so additional glazing may be needed to compensate. Routine inspections of light sources in all habitable rooms help ensure continued compliance with this provision.
General guidance for property managers — not legal advice for your specific situation. Consult an attorney for advice on your case.
Under N.J.A.C. § 5:10-16.1, tenants have a right to habitable rooms with adequate natural light meeting the minimum window-area standard. If a room appears to lack sufficient natural light—or if nearby walls seem to block most of a window's surface—tenants may document the condition and consider reporting it to the local housing or code enforcement office in their municipality. Tenant-rights organizations familiar with New Jersey housing code can help explain what options may be available, including raising a code violation as part of a broader habitability concern.
General guidance for tenants — not legal advice for your specific situation. Consult a tenant-rights organization or attorney for advice on your case.
Generated November 3, 2026 — auto-generated, not yet human-reviewed. See /transparency for methodology.
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