303 Sign Company is the full-service sign company in Louisville businesses call when they want one team for the whole project, from the first sketch to the final bolt. We design, permit, build and install signs for offices in the Colorado Tech Center, shops on Main Street and medical practices along McCaslin Boulevard.

Looking for a sign company in Louisville? 303 Sign Company designs, permits and installs exterior and interior signs for Louisville businesses from our shop at 1820 Delaware Pl in Longmont, about 25 minutes away. Our own crews handle about 95% of installations, and we manage design, permits and fabrication for you. Call (888) 303-3936 (Monday through Friday, 8:30 AM to 5 PM) or use the quote form on this page.
Louisville packs a lot of different sign needs into a small town. Tech and light-industrial tenants in the Colorado Tech Center need clean building letters and suite signs. Restaurants and boutiques in Historic Downtown need storefront signs that fit the character of Main Street. Offices in Centennial Valley need lobby signs, ADA room signs and directories that all match.
303 Sign Company handles all of it without handing you off. We meet you on site, design the sign, prepare the permit drawings, coordinate fabrication, and send our own crew to install it. That means one phone number, one schedule and one team responsible for how the finished sign looks on your building.


We lay out your sign to scale on a photo of your actual building or wall, so you see size, color and placement before anything is built.

We prepare the drawings and handle the permit process with the city, including landlord sign criteria for multi-tenant buildings.

Letters, cabinets, panels and graphics are built to your approved design in aluminum, acrylic, PVC or vinyl.

Our own crews install your sign. About 95% of our work is self-performed, not handed to subcontractors.
Louisville's business districts look and work very differently, and the right sign depends on where you are. Here's how we approach each one.
Not sure what fits your building? Send us a photo. We'll suggest the sign types that make sense for your location and budget, show them to scale on your building, and explain what the approval process will look like before you commit to anything.
Most Louisville clients come to us for more than one sign. A typical office move-in includes an exterior building sign, a lobby sign, ADA room IDs and a directory, and we handle the full package so everything matches.

Offices and tech companies. Colorado Tech Center and Centennial Valley tenants usually need an exterior sign that meets the property's sign criteria, plus a lobby sign and room signs inside. We coordinate with property management so approval doesn't stall your move-in date.
Retail and restaurants. Downtown Louisville is walkable and close-knit, so storefront signs here are seen up close. We design for that distance: clean letterforms, quality materials and lighting that fits the street.
Medical and dental. Practices along McCaslin and South Boulder Road need wayfinding and ADA-compliant signs as much as a building sign. We handle both so patients find the right door.
Property managers. One vendor for tenant panels, monument updates, directories and suite signs across a Louisville portfolio.
Design, permitting, fabrication and installation are managed by the same people, so nothing gets lost between vendors.
We self-perform about 95% of installations. The people who plan your sign are the ones who put it up.
We're about 25 minutes from Louisville, not a national franchise shipping your job across the country.
We work mostly with offices, retailers, medical practices, property managers and companies with growing fleets.
Louisville signs face high-altitude sun, hail, wind off the foothills and big temperature swings. We spec materials that hold up: aluminum returns and backers, UV-stable acrylic faces, outdoor-rated vinyls and LED modules made for cold starts.
We also think about maintenance. Signs are built so faces can be replaced and lighting serviced without tearing the sign off the wall, which keeps long-term costs down for Louisville owners and property managers.

Real signs from our shop and crews. No stock photos.






Most Louisville owners only buy a major sign every few years, so it helps to know what separates a good sign company from a frustrating one. Before you sign a proposal with any sign company in Louisville, including us, ask these questions:
At 303 Sign Company the answer to each of those is yes: our own crews install, we handle permits, you approve a scaled proof, and we make interior and exterior signs as one package.
★★★★★“They have done 2 commercial vehicles for us and the customer has been very happy with both. On my side, they were efficient and well organized. They helped my business look good to our customers. Thank you.”
Jack DillonGoogle review
★★★★★“I been using Sign303 for years to wrap my moving trucks and will continue to do so in the future. Very professional work and Dave has great customer service.”
Pro Movers LLCGoogle review
We work throughout Louisville, from the Colorado Tech Center and Centennial Valley to Historic Downtown, Coal Creek and the McCaslin Boulevard shopping centers. We also serve Lafayette, Superior, Broomfield, Boulder and Erie.
Yes. 303 Sign Company is based at 1820 Delaware Pl in Longmont, about 25 minutes from Louisville, and we work with Louisville businesses every month.
Yes. Business parks and multi-tenant buildings often have their own sign criteria on top of the city's rules. We design to those criteria and handle the landlord approval along with the permit.
Yes. We design storefront and blade signs that fit Main Street's character and are sized to be read by people on foot.
Yes. We prepare the drawings and manage the permit process as part of your project, so you don't have to chase paperwork.
Our own crews. We self-perform about 95% of installations instead of subcontracting them.
Yes. We regularly handle the exterior sign, lobby sign, ADA room signs, directories and window graphics as one package so it all matches.
Most projects take about one to two weeks after you approve the design. Permits and larger structural signs like monuments can take longer, and we give you a realistic schedule up front.
Often, yes. We can reface cabinets, replace panels and retrofit older lighting to LED, and we'll tell you honestly whether servicing or replacing is the better value.
Yes. We keep your files and specifications on hand so tenant panels, suite signs and directories stay consistent across every property.
Yes. We make storefront signs, channel letters, blade signs, window graphics and ADA restroom signs for restaurants.
Call (888) 303-3936 or use the form on this page. Send a photo of your building and your logo if you have them, and we'll follow up.
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Tell us about your Louisville location and what you need, from one storefront sign to a full building package. Quotes are free. Call (888) 303-3936 or use the form below.