Annexe Planning Applications & Leads

An annexe planning application covers a wide range of residential ancillary accommodation projects. The most common type is the granny annexe—a self-contained or semi-independent residential unit built within or adjacent to an existing family home, typically designed to house elderly relatives, adult children, or generate rental income. Garden annexes fall into the same category: purpose-built structures in the garden space that provide separate living accommodation while remaining on the same plot.

Planning Signal's database includes all formal planning applications for annexe development, regardless of construction method or scale. This encompasses traditional brick-and-block extensions with separate entrances, modular and prefabricated annexe units, converted barns and outbuildings, and new-build ancillary dwellings. The applications we track include full planning permissions, reserved matters approvals, and outline consents where annexe development is a material part of the scheme. Each record contains the planning reference, site address, local authority, detailed application description, application type, key dates, decision status, and a direct link to the council's own planning portal—plus agent and applicant contact details where the local authority publishes them publicly.

Traditionally, only large national contractors and established suppliers with dedicated planning intelligence teams have monitored planning applications systematically. Firms like Glenigan and Barbour ABI serve the construction industry, but their services are expensive, often bundled with data you don't need, and their alerts typically arrive after initial council validation—meaning you're already competing against other established players who've seen the same lead. Smaller manufacturers, regional contractors, architects, and specialist suppliers have been largely locked out of early-stage lead generation, relying instead on word-of-mouth, local networks, or reactive tendering.

Planning Signal exists to democratise access to planning data. We monitor every local authority planning portal across the UK and alert subscribers the moment a new annexe application is published. Our focus is narrow and deep: we specialise in annexe planning applications specifically, which means our data is clean, our alerts are relevant, and our pricing is built for businesses of all sizes. You're not paying for data you won't use, and you're not competing against every other construction firm in the country—you're reaching genuine annexe projects, early, at a price that makes sense for regional and specialist operators.

Planning Signal delivers annexe planning applications to your inbox as alerts, with full details of each new application: planning reference, site location, local authority, applicant and agent information (where published), application description, and a direct link to the council record. This means you can assess fit, identify decision-makers, and reach out while the application is still fresh and the applicant is actively forming their project team.

Our data also powers deeper research. You can filter applications by region, local authority, application type, and decision status, allowing you to build targeted prospect lists, identify clusters of activity in your strongest markets, and spot repeat applicants or agents who regularly handle annexe schemes. For architects and designers, this reveals which practices are winning annexe work in your area. For manufacturers, it shows where demand is concentrated. For contractors and suppliers, it's a pipeline of genuine, early-stage opportunities—projects that haven't yet been advertised on tender portals or construction news sites. By acting at the planning stage, you compress your sales cycle and compete on merit and relationship, not just price.