Billboard Revenue You're Overlooking — How Signage Can Outperform the Building

A seller called me about a small commercial building on a hard corner and spent ten minutes on the rent roll before mentioning, almost as an afterthought, that there was "a billboard on the roof, I think the sign company pays us something." That sign was one of the more valuable things about the property, and it was nowhere in the marketing package.

This happens constantly. Signage income gets treated as a rounding error on the P&L when, on the right parcel, it's the line item with the best margin in the building — no tenant improvements, no turnover, no vacancy, nobody calling about the HVAC.

Here's what's actually going on, and why the opportunity is narrower than it sounds.

Why you almost certainly can't just put one up

The first thing people assume is that a visible corner plus a willing advertiser equals revenue. In the City of Los Angeles, it doesn't.

Under Los Angeles Municipal Code Section 14.4.4(B)(11), off-site signs are prohibited — and that prohibition covers altering, enlarging, or converting a legally existing off-site sign into a digital display. Ordinance No. 180841, adopted by City Council in August 2009, locked that in. There are narrow exceptions: a sign specifically permitted under a relocation agreement pursuant to California Business and Professions Code Section 5412, or one specifically permitted under a legally adopted specific plan, supplemental use district (which is how sign districts get created), or approved development agreement.

Read that list again, because it's the whole ballgame. New billboard inventory in LA essentially comes from relocation agreements and sign districts, not from a landlord deciding there's a nice blank wall facing the freeway.

Worth knowing the distinction the code turns on: your own business's sign advertising what happens inside the building is an on-site sign, with its own set of rules. Renting space on your building to advertise somebody else's product is an off-site sign. That's the category that's locked down.

So the realistic play for most owners isn't creating signage value. It's finding out whether you already own it and have been underpricing it.

The city rules are in motion for the first time in years

The draft citywide sign ordinance had been frozen since 2021, and LA's last comprehensive sign ordinance update was back in 2007. On August 26, 2026, City Council unanimously passed Councilmember Bob Blumenfield's motion to reactivate the expired proposal and use it as a starting point for a new comprehensive law.

Nothing is adopted, and the process is explicitly open-ended. But if you own a parcel with an existing sign, or one that might plausibly end up in a sign district, this is the first real movement in that file in half a decade — worth tracking rather than assuming the rules hold.

The state permit nobody asks about

There's a second regulator, and buyers miss it routinely.

Caltrans administers the Outdoor Advertising Act, Business and Professions Code Sections 5200 through 5486, and regulates displays visible from California highways on the National Highway System. A display adjacent to an interstate or primary highway needs a Caltrans permit, and the applicant has to hold an outdoor advertising license before applying for one. Those licenses renew annually, with renewals due by June 30.

Which means a freeway-visible sign has a paper trail at two agencies. If the seller can't produce both, that's not a detail to clean up after closing. An unpermitted or illegally altered off-site sign is a liability wearing a revenue costume.

What to actually check before you price it

If you own, or are buying, a property with signage income, these are the questions I'd want answered in writing:

Is the sign legal, and legal as what? Pull the building permit history at Building and Safety and the Caltrans permit if it's highway-visible. Legally existing nonconforming is a real status with real value. "It's been there forever" is not that status.

What document creates the revenue — a lease, a license, or an easement? This matters more than the rate. A recorded sign easement runs with the land and can outlive your ownership and constrain what you build. A short-term license is nearly worthless to a buyer and nearly costless to lose.

How long, and on whose option? Many of these agreements carry long terms with renewal options sitting entirely with the sign company. Find out who controls the next twenty years before you underwrite twenty years of income.

Who owns the structure, and who pays for what? Maintenance, access rights, insurance, indemnity, and what happens to the steel if the agreement ends.

Does it survive a sale, and does it block redevelopment? A sign agreement that gives the operator access rights across the site, or that can't be terminated for construction, can quietly take a redevelopment play off the table. Price that.

How will a lender treat it? Don't assume signage income gets underwritten like base rent. Ask your lender early, before it surprises you in the loan sizing.

And get an estoppel from the sign company the same way you would from any other tenant. It's the cheapest diligence in the deal.

The short version

Signage is one of the few remaining places in LA commercial real estate where scarcity is written directly into the code. New off-site inventory is largely prohibited, which is exactly why an existing, properly permitted sign is worth taking seriously instead of treating it as miscellaneous income. The owners who get paid for it are the ones who can document it.

If you own a property with a billboard, a wall sign, or a pylon generating income — or you're buying one and want to know whether the signage actually conveys and at what value — send me the address. I'll tell you what I see in the records.

This post is general information, not legal, tax, or financial advice. Sign law in Los Angeles is unusually fact-specific — get advice on your particular property and documents before you sign or price anything.