How to Light a New Build Estate

Adopted vs Private Lighting

The first critical question on any new build estate is: will the lighting be adopted by the local highway authority?

• Adopted lighting (Section 38 / Section 278 agreements) — the local authority takes ownership and maintenance responsibility after a defects liability period (typically 12–24 months). The lighting must comply with the authority's specification, which varies by council but generally follows BS 5489 and the authority's approved product list.

• Private lighting — the developer or management company retains ownership and maintenance responsibility. This allows greater design freedom but requires long-term maintenance planning and budgeting.

For adopted roads, early engagement with the local highway authority is essential. Many authorities maintain approved column and lantern lists — specifying only products they are willing to maintain and hold spares for. EOS works with developers and their lighting designers to ensure products meet both the authority's requirements and the project's design aspirations.

BS 5489 and Lighting Classes

BS 5489-1:2020 assigns lighting classes based on the function and traffic characteristics of each road within the estate:

• ME classes (ME1–ME6) — for motorised traffic routes. Specified in terms of road surface luminance (cd/m²), uniformity and glare limitation. Rarely applicable within residential estates except for spine roads.

• CE classes (CE0–CE5) — for conflict areas including junctions, roundabouts, pedestrian crossings and speed-reduction features. These areas require higher illuminance to support driver decision-making.

• S classes (S1–S6) — for subsidiary roads, footpaths and cycle tracks. Most residential estate roads fall into S3–S5, requiring 2–7.5 lux maintained illuminance depending on traffic volume and crime risk.

• P classes (P1–P6) — for pedestrian areas, footpaths and amenity spaces within the development.

The lighting designer assigns classes based on a risk assessment considering traffic speed, volume, junction complexity, crime statistics and environmental zone. EOS provides full BS 5489 compliance calculations as part of our lighting design service.

Secured by Design

Secured by Design (SBD) is the UK police-backed crime prevention initiative. For residential developments, SBD accreditation requires:

• Uniform illumination of all public footpaths, car parking areas and communal spaces — avoiding dark pockets that reduce natural surveillance • Appropriate colour rendering (CRI ≥ 60 minimum, CRI ≥ 70 preferred) to support facial recognition and CCTV effectiveness • Lighting of building entrances and communal doorways to at least 20 lux • Avoidance of harsh shadows and extreme contrast ratios that impair visibility • Vandal-resistant luminaires (IK08 minimum) in communal and publicly accessible areas

Many housing developers seek SBD accreditation as it can reduce insurance premiums and increase buyer confidence. EOS luminaires meet SBD requirements with CRI ≥ 80 as standard across our street, bollard and wall-mounted ranges.

Part L Energy Compliance

New build developments must comply with Part L of the Building Regulations for energy efficiency. For external lighting, the key requirements are:

• Maximum installed power density for communal external lighting • Presence of automatic controls — photocell switching (mandatory) and dimming capability (increasingly expected) • Efficacy requirements — luminaires should achieve at least 80 lm/W (circuit watts including driver losses), though modern LED products comfortably exceed 120 lm/W

Adaptive lighting — dimming output during low-activity hours (typically midnight to 06:00) — is now expected by most local authorities for adopted lighting. Common profiles include:

• Full output — dusk to midnight • Dimmed to 50–75% — midnight to 06:00 • Full output — 06:00 to dawn

EOS street and residential luminaires support programmable dimming via DALI, 1-10V or integral photocell/timer units, meeting all Part L and authority-specific dimming requirements.

Practical Design Considerations

• Column heights — typically 5m or 6m for residential estate roads. Taller columns (8m+) may be required for spine roads but are generally resisted by planning authorities in residential settings for visual amenity reasons.

• Column spacing — determined by photometric calculation to achieve the required lighting class. Typical spacings range from 25–35m depending on column height, luminaire output and road width.

• Colour temperature — 3000K warm white is increasingly specified for residential estates, balancing energy efficiency with residential amenity and ecological sensitivity. Some authorities still specify 4000K; others are moving to 2700K for rural-edge developments.

• Obtrusive light — light trespass onto residential windows must comply with ILP GN01 limits. Careful luminaire selection and aiming is essential, particularly for columns adjacent to houses.

• Cabling and ducting — typically 2-core 6mm² SWA cable in ducts, with draw-pit access at column positions. The electrical design must comply with BS 7671 and the local authority's specification for adopted installations.

• Warranty and spares — adopted lighting requires long-term spares availability (typically 10–15 years). EOS commits to product and spares continuity across all our ranges.