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Planning-Focused Daylight &amp; Sunlight Assessments from Industry Leaders

At Anstey Horne, we are the UK’s foremost experts in Daylight &amp; Sunlight analysis for planning applications. With unrivalled technical expertise and deep knowledge of planning policy, we support developers, architects, and consultants in delivering high-quality, policy-compliant schemes that stand up to planning scrutiny.

Daylight and sunlight are key material considerations in planning decisions. Local authorities routinely require assessments to:

Ensure neighbouring properties retain adequate levels of natural light;

Confirm that proposed residential units receive appropriate daylight and sunlight;

Maintain high standards of amenity in urban environments.

Our reports and advice help unlock development potential while addressing planning policy requirements, <a href="https://www.ansteyhorne.co.uk/news/daylight-and-sunlight-bre-guidelines">BRE guidance</a>, and site-specific constraints.

We provide a full suite of Daylight &amp; Sunlight services tailored to the planning process:

Daylight &amp; Sunlight Impact Assessments Comprehensive analysis of impacts on neighbouring buildings and gardens using <a href="https://bregroup.com/store/bookshop/site-layout-planning-for-daylight-and-sunlight-a-guide-to-good-practice-br-209-2022-edition" target="_blank" rel="noreferrer noopener">BRE BR209 (2022)</a> and BS EN 17037 methodologies. Delivered as formal reports for submission with planning applications.

Internal Daylighting Analysis Detailed assessments of daylight provision within proposed habitable rooms, supporting high-quality design and amenity.

Design Development Advice Early-stage input to inform layouts and massing strategies that align with planning policy while maximising development potential.

Alternative Target Assessments Justified departures from BRE standards using contextual modelling, particularly in dense urban environments or constrained sites.

Solar Glare &amp; Overshadowing Studies Impact analysis for neighbouring spaces, private amenity areas, and sensitive receptors, including public realm assessments and APSH calculations.

Appeals and Expert Witness Expert-led input in planning appeals and public inquiries. We provide clear, evidence-based reports that hold up under cross-examination.

We leverage detailed 3D city models and state-of-the-art analysis tools to provide accurate assessments quickly and efficiently. Our city models for London, Birmingham, Manchester, and other urban centres enable contextual daylight and sunlight studies that go beyond default assumptions.

<a href="https://www.ansteyhorne.co.uk/news/vertical-sky-component-vsc">Vertical Sky Component (VSC)</a>

<a href="https://www.ansteyhorne.co.uk/news/annual-probable-sunlight-hours-apsh">Annual Probable Sunlight Hours (APSH)</a>

Where appropriate, we justify bespoke target values using local context and design-led reasoning.

Developers – From feasibility to appeal, we help unlock complex sites.

Architects and Designers – Integrated advice that supports high-quality design.

Planning Consultants – Robust technical inputs that de-risk applications.

Local Authorities and Third Parties – Independent assessments and review advice.

<a href="https://www.ansteyhorne.co.uk/services/daylight-and-sunlight-assessment">Detailed Daylight &amp; Sunlight Assessments</a>

Maximum Development Envelopes &amp; Optimisation

<a href="https://www.ansteyhorne.co.uk/news/internal-daylight-sunlight-assessments-a-complete-guide">Internal Daylight &amp; Sunlight Assessment</a>

<a href="https://www.ansteyhorne.co.uk/news/daylight-and-sunlight-gardens-and-amenity-spaces-bre-guidance-for-outdoor-areas">Hours in Sun for Amenity Space</a>

<a href="https://www.ansteyhorne.co.uk/news/what-is-climate-based-daylight-modelling">Climate Based Assessment</a>

<a href="https://www.ansteyhorne.co.uk/services/solar-glare">Solar Glare</a>

<a href="https://www.ansteyhorne.co.uk/services/solar-panel-assessments">Solar Panel Assessments</a>

Technical adviser to Local Planning Authorities

<a href="https://www.ansteyhorne.co.uk/news/new-bre-guidelines-daylight-and-sunlight">New British Standard EN17037 View Out Assessment</a>

With the largest dedicated Daylight &amp; Sunlight team in the UK, Anstey Horne leads the industry in planning-focused consultancy. Our advice is commercially aware, technically rigorous, and always planning-policy informed. We tailor every report to meet local planning authority requirements and support successful outcomes.

Need support with a planning application or facing objections on light grounds? Speak to our Daylight &amp; Sunlight team.

For details of our specialist Daylight &amp; Sunlight surveyors near you see our <a href="https://www.ansteyhorne.co.uk/services/daylight-and-sunlight-assessment-london">London</a>, <a href="https://www.ansteyhorne.co.uk/services/daylight-sunlight-birmingham">Birmingham</a>, <a href="https://www.ansteyhorne.co.uk/services/daylight-sunlight-manchester">Manchester</a>, <a href="https://www.ansteyhorne.co.uk/services/daylight-and-sunlight-assessment-bristol">Bristol</a>, <a href="https://www.ansteyhorne.co.uk/services/daylight-and-sunlight-assessment-brighton">Brighton</a>, <a href="https://www.ansteyhorne.co.uk/services/daylight-and-sunlight-assessment-norwich-2">Norwich </a>&amp; <a href="https://www.ansteyhorne.co.uk/contact-us#plymouth">Plymouth</a> office details.

For a collection of articles on all aspects of <a href="https://www.ansteyhorne.co.uk/blogs/daylight-sunlight">this service see our blogs page.</a>

Contact us

For advice on Daylight &amp; Sunlight direct from one of our surveyors, please call our Enquiry Line on <a href="tel:020 4534 3138">020 4534 3138</a>.
If you would like us to call you, please fill in our <a href="https://www.ansteyhorne.co.uk/contact-us#contact">Contact Us</a> form and we will call you back.

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