Daylight requirements in New Forest are governed by the district's adopted development plan and supported by the council's local validation requirements. If you are planning an extension, a new home or a larger residential scheme in Totton, Lymington, New Milton, Hythe, Marchwood or Ringwood, the impact of your proposal on daylight and sunlight to neighbouring properties will be a material consideration. This guide explains how New Forest District Council approaches daylight and sunlight, which policies apply, and where national technical guidance such as the BRE guide fits in.
Who is the planning authority for New Forest?
This is an important first point. There are two separate local planning authorities covering the New Forest area:
- New Forest District Council, which is the local planning authority for the parts of the district outside the National Park, including the main towns of Totton, Lymington, New Milton, Hythe, Marchwood, Fawley and Ringwood; and
- the New Forest National Park Authority, which is a distinct local planning authority responsible for development management within the National Park boundary.
If your property lies inside the National Park, your application is dealt with by the National Park Authority under its own development plan. The rest of this guide focuses on New Forest District Council and the towns it covers.
The Local Plan and the policies that cover daylight
For the area outside the National Park, the principal development plan document is the Local Plan 2016-2036 Part One: Planning Strategy, which was adopted on 6 July 2020. It is supported by earlier saved policies, including the New Forest District Local Plan Part 2: Sites and Development Management (2014) and saved Core Strategy (2009) policies.
The key design and amenity policy is Policy ENV3: Design quality and local distinctiveness. ENV3 requires development to be of high design quality and to respect local character, and its provisions are used by the council to address amenity impacts. The council's own local validation guidance specifically cites ENV3 part (ii) as a policy driver for assessments dealing with residential amenities, lighting and noise. Closely linked is Policy ENV4: Landscape character and quality, which deals with landscape and visual matters.
Because amenity sits within ENV3, daylight and sunlight to neighbouring homes, along with overlooking and outlook, are weighed under this policy when an application is determined.
New Forest's daylight guidance position
New Forest District Council does not set its own numerical daylight or sunlight metrics in the Local Plan. Instead, it points to daylight as part of the wider amenity and sustainability assessment of a scheme. This is clearest in the council's local validation requirements, where the Sustainability Statement requirement (driven by Policies STR1 and ENV3) lists the kinds of issues a statement can cover, expressly including "Daylight Assessments" alongside flood risk, drainage, thermal comfort, pollution and ecology.
Two practical points follow from the validation checklist:
- A Sustainability Statement, which may include a daylight assessment, is required for new residential, mixed use, commercial, retail, community and leisure proposals; and
- Householder applications for alterations and extensions to dwelling houses are exempted from the formal Sustainability Statement requirement. That does not mean daylight is irrelevant to extensions, however; the amenity test under ENV3 still applies, and officers will consider loss of light and outlook to neighbours when assessing a householder scheme.
Where the Local Plan and checklist do not prescribe numerical standards, the established national technical guidance is what applicants use to evidence acceptable daylight and sunlight. In practice that means:
- BRE BR 209 (2022), Site Layout Planning for Daylight and Sunlight: A Guide to Good Practice, with its Vertical Sky Component, daylight distribution and Annual Probable Sunlight Hours tests;
- BS EN 17037, the standard for daylight provision in buildings; and
- the amenity expectations of the NPPF, applied through the Local Plan's design policies.
A BRE-based daylight and sunlight report is therefore the most robust way to demonstrate compliance with Policy ENV3 and to support a Sustainability Statement where one is required.
What this means for your project
For a rear or two-storey side extension in Totton, Lymington or New Milton, the main daylight risks are loss of light and outlook to neighbouring habitable rooms. A daylight assessment applying the BRE 25-degree and 45-degree guidance, with a Vertical Sky Component check where windows could be affected, helps show the proposal does not cause unacceptable harm under ENV3, even though a full Sustainability Statement is not needed for householder works.
For new homes and larger schemes, the same BRE methodology assesses both the impact on existing neighbours and the daylight and sunlight that new occupiers would enjoy, supporting the Sustainability Statement and the design quality expectations of ENV3.
Local context that affects daylight in New Forest
Several district-specific factors are worth bearing in mind:
- The National Park split. Because the National Park is a separate planning authority, it is essential to confirm which authority governs your site before preparing an application; the policy framework and validation requirements differ.
- Coastal and waterside towns. Lymington and the Waterside settlements such as Hythe and Marchwood have varied plot patterns and building heights, so daylight impacts must be judged against the immediate context, in line with ENV3's emphasis on local distinctiveness.
- Environmental constraints. The district sits close to internationally important habitats, and proposals can trigger requirements such as nutrient neutrality mitigation and recreational mitigation for the New Forest and Solent coast. These do not change daylight standards but do form part of the wider submission for many residential schemes.
How Fortress Associates can help
Fortress Associates prepares our daylight and sunlight report service to BRE BR 209 (2022) and BS EN 17037, tailored to the amenity tests in New Forest's Policy ENV3 and the council's Sustainability Statement requirements. We work nationwide with a 4 to 5 working day turnaround and ask for no advance payment. We can also produce Building Regulations drawings where your project needs them. To discuss your New Forest scheme, please get in touch.
Sources & further reading
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