House nameplates and numbers

Most people treat a house sign as ornament. It is, in England and Wales, a statutory obligation with a penalty attached, and the design decisions that follow from taking that seriously are different from the ones that follow from treating it as decoration.

The legal position

Street naming and numbering in England and Wales runs on the Public Health Act 1925, and the duty sits on both sides.

The local authority’s duty is to have the name of every street painted or otherwise marked in a conspicuous position on a house, building or erection in or near the street, and to renew or alter that marking when the name changes or the lettering becomes illegible.

The occupier’s duty is to display the allocated number or approved house name in a clear and prominent position, so that it can be read from the street. Where an occupier fails to display appropriate signage within one week of notice from the council, they may be liable to a penalty under section 19 of the 1925 Act and section 37 of the Criminal Justice Act 1982.

Two further points from the same Act are less well known:

• You cannot simply rename your house. Street names and property names are allocated through the local authority’s street naming and numbering function. A name you invent and screw to the wall is not the property’s address.
• Street name plates are protected. Pulling down a lawfully set-up street name, setting up a different name, or placing any notice or advertisement within twelve inches of a street name marked on a building attracts a penalty.

The obligation is about being findable, not about taste. The people it exists for are the ambulance driver and the delivery at dusk.

What makes a plate readable

The legal test is that it can be read from the street. That is a legibility specification in disguise, and four things carry it.

Size. A plate is read from a moving vehicle at an oblique angle in poor light. Numerals on a roadside plate need to be far larger than they look on a desk. When in doubt, the number is too small.

Contrast. Light letters on a dark ground, or dark on light, with nothing in between. This is where dark slate works well — engraved letters filled with white or gilt give strong tonal separation. Painted-out or weathered fill is the commonest reason an old sign has stopped working.

Letterform. Simple, open, generously spaced. Script and ornamental faces lose at distance because their strokes vary and their counters close up. Numerals suffer most: an ornate 3, 5 and 8 become the same shape at forty metres.

Position and light. Beside the entrance, at a height that is not obscured by planting or a parked car, and where a headlight or streetlight will fall on it. A perfect plate behind a hedge is not compliant with the thing the rule cares about.

Materials, briefly

The choice is between weather resistance, legibility and appearance, and it is covered in slate and stone. Slate wins on durability and needs a filled engraved letter to give it contrast. Acrylic is cheap and light and does not enjoy years of UV. Cast metal lasts longest and costs most. Timber needs a maintenance regime it will usually not get.

Practical points

• Check with the council before choosing a name. If the name is not the registered one, mail and emergency services may not find it.
• Keep the number even when the house has a name. A named house without its allocated number is harder to find, and where a number has been allocated it remains the address.
• Fixings and drainage. Stainless fixings and a ventilated gap behind the plate; the sign outlives its screws otherwise.
• Renew the fill. Repainting the letters on a slate plate every few years restores more legibility than replacing the sign.