June 2026 · Guide

Spec-in: how to get your product specified at planning stage

By the time a project reaches tender, the materials are usually already specified. Here is how suppliers get in earlier.

What spec-in actually means

To be specified, or speced-in, is to have your product named in a project’s specification and drawings so it becomes the intended choice rather than something a contractor prices up or swaps out later. The person who makes that decision is the specifier: usually the architect, designer or engineer shaping the scheme, not the main contractor who builds it.

Being specified is worth far more than being one of three quotes, because it changes the question on the table. Instead of competing on price against whatever was named, you are the named product, and anyone offering an alternative has to argue their way in. The catch is timing: specification happens early, while the design is still being worked out.

Why tender is too late

Most suppliers meet a project at tender or main-contractor shortlist. By then the specification is written, the drawings are issued, and the materials are largely settled. You are either the named product being priced, or you are trying to substitute your way past one, which is slow, uncertain and usually a race to the bottom on price.

The decision you actually want to influence happened months earlier, during design, when the specifier was choosing between options. To shape it, you have to reach the project while that window is still open. The first public sign that a scheme has reached that stage is its planning application.

The planning application is the early signal

When a scheme is submitted for planning, the design intent has taken shape. Drawings, design-and-access statements and, on larger or heritage schemes, materials and fenestration details are often part of the submission and become public on the council register. That is the moment the specification is live and still movable.

Watching the register turns spec-in from guesswork into a routine. Instead of hoping to hear about a project through word of mouth, you see relevant applications the day they land, while there is still time to get your product in front of the specifier.

Who to approach, and how

On most applications the planning agent or the architect is named, and that is your route in. They are the spec gatekeeper for the scheme. A value-first approach works far better than a cold pitch: relevant case studies, a lunch-and-learn or CPD, technical detailing help, or simply the right information at the right moment, while the detail is still being drawn.

This is the motion that suits material and product suppliers and specialist categories such as glazing and window suppliers, where heritage, conservation and architectural work is decided on detail rather than price.

How to find the right projects

The trick is filtering the register down to the schemes that actually need your product. Set the project types and scale that fit your range, and add keyword alerts for the language your category appears under, for a heritage glazing supplier that might be sash, Crittall, conservation or listed, so only relevant applications reach you.

You can browse the live register for any area on the SiteLens council pages, and SiteLens classifies every new UK application by trade, project type and estimated value, then emails the matches each morning, so the right projects come to you instead of you trawling portals.

Turning a planning alert into a spec-in conversation

When a relevant application appears, read the brief and the documents to confirm it is your kind of work, identify the agent or architect, and make contact while the specification is open. The goal is not to sell on day one, it is to be the supplier the specifier thinks of when they detail your part of the building.

Done consistently, this is a pipeline rather than a scramble: a steady flow of schemes at exactly the stage where being specified is still possible. Compared with researched bid intelligence from the enterprise platforms (see SiteLens vs Glenigan), it is a far cheaper way to reach work early, because the planning register is public and the value is in watching it well.

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