A building sign does more than mark a location. It shapes first impressions, brings in customers who were not looking for you, and tells the ones who were that they have arrived. The right sign depends on how people approach the property, what the building will accept, what the city will permit, and what your brand needs to say. Here is how to work through those in order.
The Main Types
| Sign type | Best for | Keep in mind |
|---|---|---|
| Channel letters, front-lit | Retail, restaurants, anything that needs to be read at night from the street | Needs power and an electrical permit; the premium option |
| Channel letters, halo-lit | Offices, hospitality, brands that want a refined look after dark | Reads softer than front-lit; needs a wall that reflects light well |
| Cabinet (box) sign | Multi-tenant buildings, large logos, changeable faces | Can look dated if oversized; needs drainage and a strong wall |
| Flat-cut letters (acrylic, metal, PVC) | Offices, medical, professional services | Not lit unless external lighting is added; clean and economical |
| Panel sign (aluminum composite) | Suites, directories, budget storefronts, temporary tenants | Fastest and least expensive; reads as a panel |
| Blade or projecting sign | Pedestrian streets, historic districts, breweries and shops | Read from the sidewalk, not the road; height and projection are regulated |
| Awning and canopy graphics | Storefronts with existing awnings | Fabric life is shorter than the sign |
| Window graphics | Hours, logos, secondary messages | Cheapest visibility on the building; pairs with any of the above |
Start With Distance
Before choosing a material, decide how far away the sign has to be read. The working rule is about ten feet of comfortable reading distance for every inch of letter height, and about half that for maximum legibility when the viewer is moving.
| Letter height | Comfortable reading distance |
|---|---|
| 3 inches | 30 feet, a sidewalk sign |
| 6 inches | 60 feet, across a parking lot |
| 12 inches | 120 feet, a two-lane street |
| 18 inches | 180 feet, an arterial road |
| 24 inches | 240 feet, a highway frontage or a large lot |
| 36 inches | 360 feet, freeway visibility |
A driver at 35 miles per hour covers about 50 feet every second and needs a few seconds to notice, read, and decide, so a sign meant to be read from a road needs letters far larger than most people expect. A sign read on foot can be much smaller and much more detailed.
Denver Rules You Cannot Skip
- Sign permit. Most exterior signs in Denver need a sign permit from Community Planning and Development. The zoning review sets the allowed sign area (usually tied to your building frontage and zone district), height, number of signs, and illumination. Suburbs such as Arvada, Lakewood, Aurora, and Littleton each have their own codes.
- Electrical permit. Illuminated signs need an electrical permit and a licensed electrician for the final connection.
- Historic districts and design review. Buildings in historic districts and some downtown areas go through design review, which can limit lighting, size, and how the sign attaches to the facade.
- Landlord sign criteria. Multi-tenant buildings and shopping centers publish sign criteria: sizes, letter styles, colors, and mounting methods. Get written approval before fabrication.
- Engineering. Large, heavy, or wind-exposed signs may need an engineer's letter for the attachment, and Front Range wind loads are real.
Rules vary by zone district and change with code updates, so confirm the specifics for your address before anything is built. Permitting typically takes two to six weeks, and it is the step most often left out of a timeline.
Match the Sign to the Building
- Brick. The best substrate. Anchors go into the brick units with a plan for sealing every penetration.
- Stucco and EIFS. Foam-backed synthetic stucco cannot carry a heavy sign on its own. The sign has to reach the framing behind it, usually with through-bolts to blocking, and the penetrations have to be sealed against water.
- Metal panel. Attach to the structure, not the panel, and plan for the rain-screen gap.
- Glass storefront. Window vinyl, hanging cabinets inside the glass, or a sign above the glazing on the fascia.
- Historic masonry. Minimize new holes, reuse old ones where possible, and use mounting that can be reversed.
- Raceways vs. individual mounting. Channel letters mounted on a raceway need fewer wall penetrations and are easier to service; individually mounted letters look cleaner. Landlords often specify one or the other.
Built for Colorado Weather
UV-stable acrylic faces, powder-coated aluminum returns, and stainless hardware are the baseline here. Cabinets need weep holes so meltwater drains. LEDs should carry a multi-year warranty and a serviceable power supply. Hail damages faces, so polycarbonate is worth considering on exposed cabinets. And the attachment has to be designed for the wind, not just for the weight of the sign.
Illumination
If customers come after dark, the sign has to be lit. Front-lit channel letters are the most legible from distance; halo-lit letters look refined and work well on textured or dark walls. Both run on low-voltage LEDs through a transformer, and both should be on a photocell or a timer so nobody has to remember the switch.
Budget and Timeline
From least to most expensive, the usual order is window graphics, flat-cut letters, panel signs, non-illuminated channel letters, illuminated channel letters, and lit cabinet signs, with size, quantity, and installation access moving each one up or down. Timeline: about a week for design and proofing, two to six weeks for permitting, three to six weeks for fabrication, and usually a single day for installation. Order the sign early in a tenant improvement and it goes up the week you open.
Choose for the Long Term
A good building sign should still feel right years later. It fits the building, supports the brand, reads from where customers actually approach, and was installed by someone who planned the attachment before drilling. If you are weighing options, send us a photo of the building and the elevation where the sign will go, and we will tell you what would work and what the city is likely to allow. Our guide to hiring a sign installer covers the questions to ask once you are ready.