How to Choose Address Numbers for House | Street-Readable Rules

Choose address numbers at least 4 inches tall with high contrast and a simple font, mounted where they’re visible from the street without obstruction.

Picking house numbers feels minor until a delivery driver drives past your home twice or an ambulance slows to find you. The right choice is straightforward: large, bold, high-contrast numbers placed where anyone on the street can read them in seconds. Here’s what actually matters, what the codes say, and where to mount them so they work all year.

What Size Should House Numbers Be?

Size is the single most common mistake. Numbers that look big on the porch often shrink to nothing from the curb. The widely cited minimum across U.S. building codes is 4 inches tall with a 1/2-inch minimum stroke width — the thickness of the number lines themselves. Some jurisdictions require anywhere from 3 to 6 inches, so check your local ordinance before buying.

Local rules vary, and they can be stricter than the common 4-inch benchmark. A county in Illinois requires plainly legible numbers without spelling out a specific height, while other municipalities set exact dimensions. The practical rule: the farther your home sits from the street, the larger the numbers need to be. A house 50 feet back needs bigger digits than one 15 feet from the curb.

Height alone isn’t enough. A tall, thin font with narrow strokes can be harder to read than a shorter bold one. Pick a simple, block-style typeface — avoid cursive, script, or decorative faces that blur at distance.

Contrast and Finish Matter More Than You Think

A number’s color and finish determine whether it’s readable at night and in glare. The rule is simple: dark numbers on a light background, or light numbers on a dark background. Brushed or matte finishes beat glossy ones because they reduce glare from headlights and direct sunlight. Reflective numbers help at night but can wash out under bright porch lights — a matte finish with good contrast is the safer default.

Consider your home’s exterior before ordering. Dark bronze numbers vanish against brick siding; white numbers disappear on pale stucco. Hold a sample against the actual mounting surface before you commit.

Where Should Address Numbers Be Placed?

The USPS standard requires that address numbers be clearly visible and not obscured by trees, shrubs, or permanent objects. Placement comes down to one goal: visibility from the street without anyone having to search. Common locations that satisfy this:

• Above or beside the front door — the classic spot, but only works when the door faces the street and isn’t set back behind a porch.
• On the garage — a good option when the garage faces the street and the front door doesn’t.
• On a mailbox post — effective if the mailbox sits near the street and the house is set back.
• At the driveway entrance — required in many jurisdictions for homes not easily visible from the road; a second set here is often the difference between found and missed.

Numbers should face the street from which the address is assigned. If your home sits behind another structure or around a bend, mount a second set at the driveway entrance so responders and drivers see it before they pass the turn.

The reason for all this is practical: fire, EMS, and police need to identify your home instantly. An obscured or undersized number can delay emergency response by precious minutes.

Common Mistakes to Avoid

A few recurring errors explain most hard-to-find addresses. Check your own setup against this list:

• Numbers too small — under 4 inches for most homes, or undersized for long sightlines.
• Low-contrast colors — numbers that blend into siding, brick, or trim.
• Decorative fonts — pretty up close, unreadable from the street.
• Obstructions — landscaping, porch railings, or parked vehicles blocking the view.
• Visible only up close — readable from the porch but not from the driveway approach.
• No second set at the driveway — a common gap for setback homes.

For apartments or multi-unit properties, signage may need to identify the unit as well as the street number, though exact requirements depend on local code and property configuration.

If you’re ready to shop, our tested roundup of the best address numbers for your house compares top options by size, finish, and visibility.