Short-Term Rental Regulation in 2021

Regulation is the risk that never appears in a revenue projection and the one most likely to end an investment outright. Every jurisdiction sits in one of four positions, and identifying which answers most of what matters. This is where it stood in 2021, which was the year domestic travel came back faster than anyone had modelled.

What 2021 changed

2021 was the year short-term rental demand came back violently. Domestic leisure travel recovered far faster than international, drive-to markets absorbed the overflow, and guests who would previously have booked a hotel booked a whole house instead. Supply had not caught up, so occupancy and nightly rates rose together, which almost never happens.

Demand outran supply for most of the year. Properties that would have struggled in 2019 filled at rates their owners had not thought possible, which made the market look easier than it was.

Mortgage rates spent most of the year near historic lows, which made financing cheap and competition for property fierce.

How it works

Regulation is the risk that never appears in a revenue projection and the one most likely to end an investment outright. Every jurisdiction sits in one of four positions, and identifying which answers most of what matters.

1. State preemption of bans, as in Arizona and Idaho, is the strongest protection available because it removes the possibility that the property becomes unable to operate legally.
2. Local control with light regulation is comfortable and offers no guarantee against a future tightening.
3. Local control with permit caps cuts both ways: a barrier when buying and a moat once in, because capped supply protects against rate compression.
4. Effectively prohibitive jurisdictions, including New York City, Denver, Atlanta and Charleston for non-owner-occupied purchases, are closed regardless of the numbers.

What that meant in 2021 specifically

Demand outran supply for most of the year. Properties that would have struggled in 2019 filled at rates their owners had not thought possible, which made the market look easier than it was.

The risk nobody priced in 2021 was that the conditions were exceptional rather than normal. Buyers who underwrote on 2021 revenue and 2021 financing costs were building a model on the best year the asset class had ever had.

The right discipline in 2021 was to underwrite on pre-pandemic revenue rather than current revenue, and to buy on a basis that would survive normalisation.

Where it goes wrong

The failure modes are consistent across years, which is itself useful information: they are not caused by the market cycle, so a different year does not protect you from them.

• Assuming a state-level headline settles a parcel-level question.
• Skipping the homeowner association declaration, which binds independently and which state preemption does not reach.
• Treating prior operation as evidence of legality or of transferability.

What a buyer should have done in 2021

The right discipline in 2021 was to underwrite on pre-pandemic revenue rather than current revenue, and to buy on a basis that would survive normalisation.

The underwriting discipline does not change with the year. Twelve individual monthly revenue figures from a comparable set you assembled, a complete expense stack including reserves, and a stress test at 75% of projection that still covers debt service.

We screen roughly a thousand deals a week and eliminate about 98% of them. That ratio has held across every year on this site, through the boom, the correction and the stabilisation, because it is a function of how listings are selected rather than of the market.

What generalises, and what does not

Reading a year in isolation is the most common analytical error in this business. 2021 had its own conditions, and someone who learned the wrong lesson from it carried that lesson into a market that no longer rewarded it.

What generalises is the mechanics above. The definitions, the tests, the sequence and the failure modes are the same in every year on this site, which is why they are worth learning properly once rather than relearning each cycle.

What does not generalise is the environment: the cost of capital, the depth of supply, the bonus depreciation percentage, and the regulatory posture of a given jurisdiction. Those change, sometimes abruptly, and a model that treats them as fixed is a model that was only ever right about one year.

The practical consequence is to build the analysis so the environment is an input rather than an assumption. A property that only works at one interest rate, one occupancy level and one tax treatment is not an investment thesis, it is a bet that nothing moves.

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