The Rooftop Lease: How a Cell Antenna Turns Your Commercial Building Into a Second Income Stream
Antenna siting is federal, the term runs in decades, and the renewal options usually belong to the carrier. The rent is real — but the lease is nothing like the ones you already know.
A carrier wants to lease my commercial rooftop for antennas — is it real money, and how is this lease different from my other commercial leases?
It is real, near-zero-cost income — but it is not an ordinary commercial lease: the term runs in decades and the renewal options usually sit with the carrier, so your only true negotiating window is before you sign. Under ISED’s CPC-2-0-03, Radiocommunication and Broadcasting Antenna Systems (Issue 6, July 2022), antenna siting is federal jurisdiction, and antennas on an existing building that raise its overall height by no more than 25% are normally excluded from municipal land-use consultation — which is exactly why carriers pay for rooftops. Negotiate four things hard: renewals and rent resets, equipment rights, co-location revenue, and exit and roof-restoration obligations.
Source: Innovation, Science and Economic Development Canada (ISED), CPC-2-0-03 — Radiocommunication and Broadcasting Antenna Systems, Issue 6 (July 2022)
I am Arthur Zhao. Every so often, a commercial property owner forwards me a letter from a site-acquisition agent: a carrier wants antennas on their roof, and the letter arrives with a rent figure and a deadline. The figure looks like free money. The deadline is doing a lot of quiet work.
A rooftop antenna lease can genuinely become a second income stream that costs you almost nothing to service. But it plays by rules most building owners have never dealt with: the approval authority is federal, not municipal; the term is measured in decades; and the renewal options usually belong to the other side. Here is how the game actually works — the rules, the clauses, and what the lease does to your building’s value on the day you sell.
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ℹ️This article covers the federal siting framework and the commercial clauses from the property owner’s side of the table. It is not legal or tax advice. Radio-frequency compliance (Safety Code 6), aeronautical marking and similar regulatory duties sit with the carrier — but your specific lease should still go through a commercial real estate lawyer, clause by clause.
City hall does not decide this — Ottawa does
Most owners assume an antenna needs municipal approval. It does not work that way. Under the federal Radiocommunication Act, final authority over where antenna systems go rests with Innovation, Science and Economic Development Canada (ISED). Municipalities get consulted through a defined process — they do not get a veto.
The rulebook is ISED’s CPC-2-0-03, Radiocommunication and Broadcasting Antenna Systems, Issue 6 (July 2022). It sets out when a proponent must run land-use and public consultation, and when an installation is excluded from it. For a rooftop owner, the exclusions are where the money is.
Your rooftop lets the carrier skip the hard part
According to ISED (CPC-2-0-03, Issue 6, 2022), a carrier is expected to look at existing structures — rooftops, water towers — before proposing a new tower. And here is the clause that makes your roof valuable: antennas placed on a non-tower structure such as an existing building are normally excluded from land-use and public consultation, provided the structure’s height increases by no more than 25%.
Compare that with what a new tower goes through: public notification within a radius of three times the tower height, a written public comment period of at least 30 days, land-use authority consultation expected to conclude within 120 days, and a newspaper notice for structures of 30 metres or more. Since Issue 6, the old exclusion for new towers under 15 metres is no longer available to telecom carriers at all. Your rooftop lets the carrier skip months of process and uncertainty. That saved time is your leverage — price it.
💡 You are not renting out square footage. You are renting out height, location and speed — the months of consultation the carrier does not have to run because your building already exists. Do not price a rooftop antenna site the way you price retail space.
Five ways this is nothing like your other leases
The most expensive mistake owners make is signing an antenna lease with retail-lease instincts. These five clauses look familiar on the page and behave completely differently in practice.
Term and renewals: the options belong to the carrier
Do not fight the long term — fight for rent resets inside it: fixed escalations or periodic adjustments to market. A lease that renews for decades “on the same terms” is a lease that pays you today’s rent in 2050.
Equipment rights: draw the box, or lose the roof
Pin down three things: an equipment list and site plan attached as a schedule, a weight and structural-load cap, and owner’s written consent for additions. That consent right is not bureaucracy — it is your ticket into the next clause.
Co-location: do not let the carrier become your subtenant’s landlord
Negotiate three protections: subletting or additional users require your consent; each new carrier signs with you directly or triggers a revenue share; and restrict assignment of the lease to third-party tower companies — once that happens, your counterparty is no longer a carrier that needs your site, it is a professional rent-collection vehicle that negotiates for a living.
The roof itself: a leak costs more than the rent
And add the clause almost everyone forgets: temporary relocation. When you re-roof in year twelve, the carrier must move or de-energize its equipment so your crew can work. Who pays, and how fast they must comply, gets written down now — not negotiated while your roofers stand idle.
⚠️Get the roof warranty question answered in writing before any penetration work: the warranty holder (manufacturer or original contractor) confirms the installation method does not void coverage. One roof leak — repair plus interior damage — can quietly consume several years of antenna rent.
Exit and relocation: do not let one antenna block a redevelopment
So what is the rent actually worth?
There is no official Canadian statistic for antenna site rents. According to CellWaves, an industry lease-consulting firm (accessed July 2026), Canadian antenna site rents broadly run $8,000 to $36,000 per year, with high-demand urban rooftops at the top of the range. Treat that as an order of magnitude from an industry intermediary, not official data.
What moves your number: how badly the carrier needs coverage exactly where you stand, how many substitute sites exist nearby, and how fast your roof lets them deploy. The first offer is almost never the best offer — an independent review before you sign is usually the highest-return money in the whole transaction.
Valuation, financing, and the day you sell
A contracted, long-term income stream flows straight into an income-approach valuation — that is the second layer of value a rooftop lease adds. But buyers and lenders will also read the lease against you: remaining term, rent-reset mechanics and the width of the carrier’s termination right all shape what they will pay for that income.
When you sell, the antenna lease runs with the property and is assigned to the buyer, who steps into the rent. In due diligence, expect requests for the complete lease, every amendment, and the notice correspondence, plus written confirmation of the lease status. A well-documented antenna lease is a selling feature; a poorly documented one is a closing delay. The only difference is your filing discipline between now and then.
The buyout letter will come — read the structure before the number
Hold an antenna lease for a few years and a lease-acquisition company will almost certainly write to you: a lump sum today for your future rent stream. According to CellWaves’ industry figures, Ontario buyout offers commonly land at 18 to 22 times annual rent. Before the multiple seduces you, check three things:
One — many buyouts are structured as a perpetual easement, not an assignment of the lease. You are not selling twenty years of rent; you are selling rights over that part of your roof forever, registered on title, following the land through every future sale and financing. Two — buyout letters tend to arrive precisely when renewal uncertainty feels scariest; the buyer is pricing your fear of the carrier walking. Three — a lump sum is taxed differently from rental income, so your accountant sees it before your signature does.
Whether to sell is your call. My only rule: until you can explain the difference between an easement and a lease, sign nothing.
🚨If the words “perpetual easement” appear anywhere in a buyout package, slow down. An easement is registered on title and follows the land through every future sale and every future financing. Before signing, have your lawyer explain exactly what you would be giving up — permanently.
💡 Bottom line: a rooftop antenna lease is a genuinely good asset — if you treat it as a decades-long commercial contract to be negotiated, not a cheque that fell out of the sky. Federal jurisdiction, decade-scale terms, carrier-held renewals: those three facts mean your real negotiating window is the one before you sign. Use it.
Frequently Asked Questions
Does a carrier need city approval before putting antennas on my building?
Often, no. Under ISED’s CPC-2-0-03 (Issue 6, 2022), antenna siting is federal jurisdiction, and antennas on an existing building are normally excluded from municipal land-use and public consultation as long as the building’s overall height increases by no more than 25%. But the exclusion only covers siting consultation — the structural load assessment and roof-warranty confirmation are still yours to demand as the owner.
Is it safe to work or live under a rooftop antenna, and who is responsible for that?
Canada’s radio-frequency exposure limits are set by Health Canada’s Safety Code 6. Under CPC-2-0-03, the carrier must ensure the installation complies with Safety Code 6 at all times, including the combined effect of nearby installations, and sites operating at 50% or more of the exposure limits must notify ISED and demonstrate compliance. It is the carrier’s legal obligation — your lease should still say so explicitly and back it with an indemnity.
How much does a rooftop antenna lease actually pay in Canada?
There is no official statistic. According to CellWaves, an industry lease-consulting firm (accessed July 2026), Canadian antenna site rents broadly run $8,000 to $36,000 per year, with urban rooftops in high-demand corridors at the top end — treat that as an industry ballpark, not government data. Your specific number depends on the coverage gap you fill, nearby substitute sites, and deployment speed. Independent advice before signing usually pays for itself.
I am selling my building — is the antenna lease a problem or a selling point?
A selling point, if your paperwork is clean. The lease runs with the property and is assigned to the buyer, who takes over the rent — contracted income that supports your asking price. Expect the buyer to request the full lease, all amendments and notices, and written confirmation of the lease status during due diligence. If you cannot produce the documents, the same lease becomes a closing delay instead.
A company offered me a lump sum to buy out my antenna lease — should I take it?
Read the structure before the number. According to CellWaves’ industry figures, Ontario buyout offers commonly run 18 to 22 times annual rent — but many are structured as a perpetual easement, meaning you sell permanent rights over part of your roof, registered on title, affecting every future sale and financing. The lump sum is also taxed differently from rental income. The multiple is negotiable; the structure is the real decision. Lawyer and accountant first, then it is your call.
Arthur Zhao
Real Estate Broker · FRI · ABR · SRS · PSA · MCNE · E-PRO · CLHMS & GUILD Elite · REAIS
VP & Branch Manager, Bay Street Group Inc.
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