I have written before about how large house numbers have to be before anyone can read them. Size is only half the problem. I have seen plenty of correctly sized address signs that still fail, because they were mounted somewhere a driver never looks.
Where should an address sign go on a house?
On the wall beside the front door, on the same side as the door handle, at roughly eye level from the walkway. That is the default that works on most houses, and it works because it is where a delivery driver already looks once they are out of the vehicle.
The complication is that there are two different readers. A driver going past at twenty miles an hour needs the number visible from the street. A driver already parked needs it visible from the walkway. If your house sits far back from the road, one sign cannot serve both, and you should choose the street reader and let the walkway take care of itself.
How high should a house number sign be mounted?
Between four and five and a half feet from the ground for a wall mounted sign. Lower than four feet and it disappears behind shrubs, cars, and snow. Higher than six feet and it sits above the natural sight line of someone approaching, which sounds trivial and is not.
For a stake mounted sign at the end of a driveway, the useful range is lower, roughly three to four feet, because the reader is in a vehicle looking slightly down rather than standing looking straight ahead. The two mounting types are not interchangeable at the same height.
Does the address sign have to be near the door?
No, and on some properties it should not be. A house set more than fifty feet back from the road, or one behind a hedge, or one on a long driveway, is better served by a sign at the property entrance. The number needs to be where the decision is made, and the decision is made at the turn, not at the door.
Houses on corners have the opposite problem. The numbered street is not always the street the front door faces. Mount the sign so it faces the street named in the address, even if that feels like the side of the house rather than the front.
What about lighting?
Half of all deliveries in winter happen after dark, which makes lighting a placement question rather than an afterthought. If there is a porch light, mount the sign inside the cone it throws. If there is not, mount it where a car headlight sweeps as the vehicle slows, which usually means facing the direction of approach rather than straight out from the wall.
Finish matters here too. A dark number on a dark background reads fine at noon and vanishes at seven in the evening. Contrast between the sign and the wall behind it does more for night visibility than any amount of extra size.
Do HOA rules restrict address signs?
Often, yes, and the restrictions are usually about material, colour, and size rather than about having a sign at all. Common rules cover maximum digit height, whether the sign may be mounted on a stake in the front yard, and whether metallic finishes are permitted on the street facing elevation.
Check before ordering rather than after. The rules are almost always in the community covenant document rather than posted anywhere, and the specific numbers vary enough that guessing is not worth it. If your association limits stake signs, a wall mounted piece near the door is generally the permitted alternative.
What hardware do you need for brick, siding, or stucco?
Each surface needs a different approach, and this is where most self installs go wrong.
For brick, drill into the mortar joint rather than the brick face. Mortar is softer, it accepts a plastic anchor cleanly, and if you ever remove the sign the repair is invisible. Drilling the brick itself risks cracking the face and leaves a permanent mark.
For vinyl or fibre cement siding, find the stud behind the panel or use a siding hook designed to hang from the panel lip. Screwing directly through vinyl without allowing for expansion causes the panel to buckle in summer heat.
For stucco, use a masonry bit and a plastic anchor, and seal around the hole. Stucco is porous, and an unsealed hole behind a mounted sign is a slow moisture path into the wall.
Whatever the surface, use stainless or coated fasteners. A steel screw will bleed a rust line down the wall within a season, and that stain is more visible than the sign.
Should the sign match the door or the house?
The house, generally. The door changes colour more often than the siding does, and matching a sign to a colour someone may repaint in three years is a short term decision. Neutral metal finishes sit against most exterior palettes without competing, which is why they stay the safe default.
Outdoor durability is a separate question from placement, and the honest answer varies a lot by material. I went through what survives real weather in which personalized signs actually hold up outdoors, and the specific case of metal in can a metal monogram go outside.
What is the single most common placement mistake?
Mounting it where it looks best rather than where it reads best. A sign centred above the garage is balanced and symmetrical and completely useless, because nobody scanning for a number looks at a garage door. The same piece moved four feet to the left of the entry works immediately.
Before you drill anything, tape a paper cutout at the intended spot and drive past your own house at normal speed. It takes five minutes and it has changed the plan for almost everyone I have suggested it to. Once the position is settled, the size question is next, and I covered that in how big house numbers have to be.
If you are still choosing the piece itself, the outdoor options live in metal wall art and metal monogram.