How to Read DEFRA Air Quality Data for a Property

Introduction

This guide answers: How to Read DEFRA Air Quality Data for a Property Treat it as a working note you can share with your conveyancer, lender, or surveyor so everyone checks the same facts.

Official data vs opinion

Separate what registers show from what someone remembers. Memories are useful pointers, not proof.

Stakeholders

Agents, conveyancers, and surveyors each need different slices of the same truth. A shared baseline reduces friction.

Completion Score

Use Property Passport UK Completion Score habits as a prompt for what is still missing or unverified, not as a substitute for advice.

Using Property Passport UK

Start from the address on [Property Search](/search). Owners can [claim the Property Passport](/claim/start) and upload Documents with clear dates and sources. Browse more explainers in the [Property Guides library](/guides). This article is general information, not legal, tax, mortgage, or survey advice.