Signage Area Allowance Calculator

Work out signage area allowance instantly with clear inputs, formula shown and shareable results.

About Signage Area Allowance Calculator

Signage entitlement is usually granted as an area per metre of building frontage, subject to an absolute cap. Which of the two governs depends on how wide the frontage is, and the practical question for a tenant is the area available per sign once the total is divided across the fascia, projecting and directional signs.

Formula

Permitted signage

Area = min(frontage x allowance per metre, absolute maximum)

Worked example

With the default values below, Signage Area Allowance Calculator returns Permitted signage area of 15.00. Change any input above and every figure here is recalculated in your browser.

Inputs used

Building frontageminimum 0.1 m: 30 m
Signage allowance per metre of frontageminimum 0.01 m²/m: 0.5 m²/m
Maximum permitted signage areaminimum 0.1 m²: 20 m²
Number of signsminimum 1: 3

Results

Permitted signage area: 15.00 m²
Area from the frontage allowance: 15.00 m²
Average area per sign: 5.000 m²
Governing constraint: Frontage allowance governs

Step by step

1Values used
2Permitted signage
3Permitted signage area= 15.00 m²
4Area from the frontage allowance= 15.00 m²
5Average area per sign= 5.000 m²
6Governing constraint= Frontage allowance governs

Assumptions and limits

The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
Figures are rounded for display to 3 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
Preliminary estimate only. Signage entitlement is set by local planning and advertisement control regulations and must be confirmed with the authority.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Preliminary estimate only. Signage entitlement is set by local planning and advertisement control regulations and must be confirmed with the authority.

Frequently Asked Questions

How is the Signage Area Allowance figure worked out?

Area = min(frontage x allowance per metre, absolute maximum). Signage entitlement is usually granted as an area per metre of building frontage, subject to an absolute cap.

Does illuminated signage have separate limits?

Often yes. Many authorities restrict illuminated area, luminance and hours of operation separately from total area, particularly near residential property.

What values do I need to enter?

This calculator takes 4 inputs: Building frontage, Signage allowance per metre of frontage, Maximum permitted signage area, Number of signs. The pre-filled defaults are a realistic worked example — replace them with your own site or project figures.