3D Design Bureau

Daylight and sunlight assessment: What you need to know

A daylight and sunlight assessment is a technical analysis that is prerequisite in many planning applications. Assessments evaluate the potential impact a proposed development might have on surrounding existing properties and the environment. Additionally, it assesses the performance of the development itself, by examining internal daylight and sunlight provision within habitable rooms, as well as the sunlight availability in proposed outdoor spaces.

Understanding the technical jargon and complex details of daylight and sunlight assessments can be challenging. To simplify this subject, we have curated a series of articles, designed to guide you through the complexities of the topic, ensuring that you are equipped with the knowledge required for an accurate and robust planning application for your development.

An overview to daylight and sunlight assessments

This article provides a detailed explanation of what constitutes a daylight and sunlight assessment, outlines its two categories, and shows what factors can improve the results generated on a project.

What are the latest daylight & sunlight guidelines and standards

We aim to clarify, most simply and straightforwardly, the BRE guidelines for daylight and sunlight assessments. We discuss the standards that should be followed and highlight the best practices for conducting these assessments effectively and accurately.

Impact assessment for the BRE daylight and sunlight report

What’s new in the BRE guidelines 3rd edition 2022

The BRE Guidelines’ latest edition was published in June 2022. This article unpacks the key changes to how assessments are conducted and outlines the new metrics introduced in this edition.

All you need to know about daylight and sunlight impact assessments

Impact assessments evaluate the effect of a proposed development on surrounding properties and the environment. In this article, we outline and explain each metric that should be considered for impact assessments, as specified in the latest edition of the BRE guidelines.

Shadow study report for the daylight and sunlight assessment

All you need to know about daylight and sunlight scheme performance assessments

Here is a concise list of the key evaluation metrics for scheme performance, as stipulated in the BRE guidelines for daylight and sunlight assessments of proposed developments.

Importance of trees for daylight and sunlight assessments

Following the latest guidelines, we explain when and why evergreen and deciduous trees should be included within an analytical 3D model, providing a practical and insightful approach to understanding their impact on daylight and sunlight assessment reports.

Aerial view of the development for daylight and sunlight assessment

How to conduct a successful daylight & sunlight assessment

From building a detailed analytical 3D model to running the assessment and writing the final report, in this article, we give an overview of the best practices for performing an accurate and efficient daylight and sunlight assessment.

Importance of the analytical 3D model to protect your planning application from judicial review

A poorly executed study can raise questions about the validity of the assessment and leave the application exposed to negative outcomes. Here are five considerations for your analytical model to ensure a successful daylight and sunlight assessment.

The image highlights the impact of material differences on reflectance values. Notice how the lighter brick material yields more favorable results it generates.
Vertical Sky Component part of the daylight and sunlight assessment

Breaking down the jargon: Daylight and sunlight assessments terminology

Complex studies involve a significant amount of technical vocabulary. This can be challenging to follow and sometimes lead to confusion within a design team or at the planning authority level. Here is a summary of the main expressions used in a daylight and sunlight assessment.

Expert answers to the top 10 FAQs on daylight and sunlight assessments

Delving into the most asked questions about daylight and sunlight assessments, our experts provide insights on the latest guidelines, key aspects that should be assessed, strategic design tactics for enhancing a project’s performance, and more!

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    Nicholas Polley - Managing Director at 3D Design Bureau


    Nicholas Polley
    Managing Director
    at 3D Design Bureau


    Lucas Imbimbo
    Richard Dalton
    Marcus Sestulis
    Lewis Burke