QR Codes for Real Estate Signs
A board outside a house is read by someone standing on the pavement or slowing down in a car. Both of those are further away than designers assume, and distance is the only variable that decides whether the code works.
The distance is further than you think
The rule is width equals reading distance divided by ten. The mistake is estimating the distance from the design studio.
| Situation | Real distance | Code width |
|---|---|---|
| Standing at the gate | 2 m | 200 mm |
| On the pavement, front garden between | 3 m | 300 mm |
| Stopped in a car at the kerb | 4 m | 400 mm |
| Slowing past on a residential street | 6 m | 600 mm |
| Set back behind a driveway | 8 m | 800 mm |
Most estate agent boards carry a code around 60–80 mm, which is sized for a reading distance of well under a metre. That is a code you can only scan by walking up to the post and leaning in — which people will do for a house they are already serious about, and will not do while passing.
If the board is not big enough for a 300 mm code, that is a real constraint and worth knowing about. In that case put the code where someone will be close to it — at the bottom of the board, at chest height — rather than pretending a small code at the top will be scanned from the road.
Where it should land
The single most valuable property of this code is that it identifies this house. Someone standing outside a specific front door wants that listing, not your homepage.
- A direct link to the property page, not the agency site, not a search results page.
- A short path on your own domain. Property URLs are long and change when a listing is re-published. A path like
agency.com/p/4417that redirects is short enough to keep the code coarse and stable enough to survive the listing being reworked. - Mobile first, genuinely. Photographs that load fast, the price and the number of bedrooms visible without scrolling, a phone number that dials on tap.
- A way to book a viewing immediately. Someone standing outside the house is the warmest lead the listing will ever get.
- Handle the sold case gracefully. When the property goes, the page should say so and offer similar listings, not return a 404. Codes stay on boards for weeks after a sale.
Surviving outdoors
A board spends months in weather. Three failure modes account for nearly all of it:
- UV fading. Ordinary inks fade in a summer, and a faded code is a low-contrast code. Use UV-stable inks or a laminated print, and treat boards as consumables.
- Water and dirt. Rain spots and road spray produce scattered damage across the whole symbol, which is the kind our testing found error correction handles worst — four to seven times worse than a single blot of the same area. A gloss surface sheds water better than matt here, which is the opposite of the usual advice, so it is a genuine trade against reflections.
- Reflections. A glossy board in direct sun is unreadable at some angles. If the board faces south, matt is worth the water penalty.
Level H is the right choice here, and unlike on a business card there is room for the extra modules.
Designing the board
- Bottom third of the board, at roughly chest height, so a phone can physically reach it. A code at the top of a two-metre post is out of range.
- Caption it with something specific. "Scan for photos, floorplan and price" beats "Scan me" substantially.
- Keep the quiet zone clear of the board's border, the agency logo and the frame.
- Print the short URL underneath in a size readable from the pavement — it is often easier to type than to scan in bright sun.
- Dark on light. Agency brand colours are frequently mid-tone, and a code in brand red on brand navy has almost no luminance contrast even though it looks striking.
Window cards are a different problem
A card in the agency window is read from about a metre through glass, so 100 mm is the target. Two extra complications: the window reflects the street, and the card is often behind glass at an angle.
Put codes low in the window rather than at eye height, where reflections are worst, and check the display in the afternoon with the sun on the front of the shop — that is the condition that breaks them.
Written by Manuel Llovet, who builds and maintains QR Code Free Forever. Published 2026-08-31, last checked 2026-09-08. Figures and measurements on this page were produced for this site; the method is described in each caption.