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Daylight and Sunlight Assessments

Daylight and sunlight assessments help architects and planners understand how new buildings affect natural light for nearby properties, ensuring a balanced blend of modern construction and its environment.

RIBA Stage Lifecycle
Phase 1
Planning & Pre-Development (RIBA 0–3)
Phase 2
Design & Building Control Compliance (RIBA 4–5)
Phase 3
Handover & Testing (RIBA 6–7)
This service is typically required during RIBA 1–3.

Importance of Daylight

Daylight, often referred to as ambient light, plays a pivotal role in enlivening indoor spaces from the break of dawn until sunset. It’s the essence of a well-illuminated, inviting environment that’s conducive to work or relaxation.

The findings from numerous research investigations indicate that exposure to both natural and artificial bright light, especially during the morning hours, can have a significant positive impact on various aspects of health.

These benefits encompass improvements in conditions such as depression, restlessness, sleep quality, the synchronisation of our internal body clock, and the management of seasonal affective disorder.

Circular Economy Statement

Right to Light and Legal Protection

The ‘Right to Light’ concept is a legal safeguard that upholds the sanctity of natural light ingress through windows. It forms a shield for the precious resource, ensuring its protection when new structures threaten to diminish it. Right-to-light assessments include calculating the Vertical Sky Component and No Sky Line to gauge direct skylight access.

Overshadowing Reports

Overshadowing reports shed light on the impact of sunlight calculations. They unveil the dance of shadows cast by the sun throughout the year, offering insights crucial for understanding shading patterns in gardens and open spaces.

Solar Gain and Energy Efficiency

Solar gain, the harnessing of solar heat, plays a pivotal role in creating energy-efficient living spaces. The direct solar gain, especially in colder climates, offers a cost-effective method of heating, reducing reliance on artificial heating sources. In contrast, managing direct solar gain becomes paramount in sun-drenched locales to prevent overheating.

Sunlight Calculations and Shadowing

Sunlight calculations unveil the celestial paths of direct sunshine concerning a building. These calculations encompass a mosaic of sunpaths throughout the year, unveiling the shifting interplay of light and shadow. These assessments often accompany shadowing reports, enriching the understanding of lighting dynamics.

Importance of Daylight and Sunlight Assessments

Daylight and sunlight assessments are not just mandatory in the world of urban development; they’re critical. They address the impact of new construction on the light levels within the existing structures, anticipating objections, and reducing planning hiccups.

De-risking Planning and Energy Efficiency

The prudent inclusion of daylight and sunlight assessments early in the planning process is a masterstroke in de-risking projects and sculpting energy-efficient spaces. These assessments aren’t merely about illumination; they influence building heights, and glazing ratios, and, in the bigger picture, can mitigate objections from the community while ensuring well-lit spaces for future occupants.

Expert Assessment

Our team of building performance specialists harness the power of 3D modelling to scrutinise the impact of new developments. We weave seamlessly into the design process, following industry best practices and regulations, to manage daylight and sunlight within and around every building project.

Circular Economy Statement

Related Sustainability Services

Daylight & Sunlight Assessments is frequently combined with the following additional services:

Energy Statements for Planning Applications

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Energy Statement – London Plan

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Sustainability Statement

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Noise Impact Assessments

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Air Quality Assessments

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Part O – Overheating Assessments

Find out more

Get Your Quote Today

Ready to explore the benefits of Daylight and Sunlight Impact Assessments for your project?

Contact our experienced team of accredited assessors today to discuss how these assessments can enhance your development plans and ensure a harmonious blend of natural light in your surroundings.

Click the Get a Quote link to access our online portal, or use the form to share brief details about your project and we will respond promptly.

Frequently Asked Questions

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These assessments are crucial for harmonising new constructions with their surroundings, ensuring that both neighbouring properties and the new building receive sufficient natural light.

These assessments take into account elements like building height, distance to boundaries, room size and shape, orientation, window placement, and material reflectance, among others.

These assessments can impact building heights and the ratio of glazing, influencing project design and costs. Early assessments can prevent objections and ensure good light levels for occupants.

Yes, the Building Research Establishment (BRE) provides guidelines for these assessments, ensuring industry standards and best practices are followed.

Assessors typically use 3D modelling software to visualise and measure the impact of new constructions on natural light.

Yes, if neighbours can prove that the development will adversely affect their daylight or sunlight, it could hinder planning permission.

By optimising natural light, these assessments can reduce the need for artificial lighting, making buildings more energy-efficient.

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