What It Costs to Start a Legal Bay St. Louis STR in 2026
Updated: Aug 29
Most Bay St. Louis listings get marketed with generic Gulf of Mexico language, the kind of caption that could describe a dozen other coastal towns. That's the wrong place to start, and it's also the wrong place to start a startup budget. A guest who typed Bay St. Louis is looking for Old Town, the harbor, beachfront, or the marina, not a postcard description; and a host planning to list here needs to start with the actual permit desk, not a furniture catalog. City of Bay St. Louis, Hancock County, sits on 340 active listings in the current extract, a large enough sample to take its seasonal and revenue figures seriously and confidently.
Bay St. Louis requires a city short-term rental permit through Planning, reachable at 228-466-5516, published in this town as a $100 form pending confirmation of the current live fee. AirROI's regulation label, whether it reads low-regulation or otherwise, is a scrape of other operators' listings, not a reading of the actual city ordinance, and it shouldn't be treated as permission to skip that call. This is not legal advice; confirm the current fee and process directly at the desk, and don't let a scraped label or a neighboring town's process stand in for a phone call that hasn't actually been made yet.
Once the permit question is answered, the second real cost is knowing what a typical Bay St. Louis listing actually earns before furnishing for a season the data doesn't support. AirROI's trailing-twelve-month extract, updated August 8, 2026, puts typical revenue at about $25,594 across 340 active rentals. This page keeps that figure on its own line, separate from Vermilion's $29,012 and Crystal Beach's $44,416 on two towns that sometimes get folded into a regional Gulf Coast average they don't actually belong in.
This page walks through both costs in the order that actually matters: the permit and its confirmed fee first, since that's the step that determines whether a listing can legally operate at all, and the revenue file second, since that's the number a startup budget should be built around once the legal question is settled. Neither should be estimated from a generic coastal-town template or borrowed from a neighboring market's own file, and both belong in writing before the first furniture order goes out.
Price the City License Before You Furnish
The first cost in starting a Bay St. Louis short-term rental is time on the correct phone line, not a dollar figure on a furniture invoice. Call Planning at 228-466-5516 and confirm the current status of the city's short-term rental permit, published in prior research as a $100 form; treat that dollar figure as a starting point to verify, not a locked-in number, since fee schedules change and this page won't guess at a current amount beyond what's been published on a primary source.
A guest searching for this town is looking for Old Town, the harbor, beachfront, or the marina, specific, walkable landmarks, not a generic Gulf of Mexico caption that could describe Vermilion, Crystal Beach, or any other coastal town nearby. That specificity matters for the listing description, but the permit desk doesn't care about landmark language; it cares about the parcel, the applicant's residency status where relevant, and the current fee. Confirm the parcel before confirming the stay, and keep that confirmation dated in case the question comes up again later in the process.
What a Typical Bay St. Louis Listing Actually Earns
AirROI's trailing-twelve-month extract, updated August 8, 2026, puts typical Bay St. Louis listing revenue at about $25,594 across 340 active rentals. Average night runs $279, occupancy sits at 31.5 percent, and revenue per available night, the figure that blends rate and occupancy together, comes out to $92. Year over year, that revenue moved down 4.5 percent while active supply held essentially flat at 0.0 percent change, a combination worth noting for anyone underwriting a new listing entering a market with softening per-listing revenue and no meaningful new-supply pressure to explain it.
The three strongest months are June, October, and May, with June the busiest and January the slowest. Most guests arrive from New Orleans, then Baton Rouge, with a typical stay of 3.8 nights booked about 60 days ahead. Superhost share runs 62.4 percent, a genuinely high bar for guest expectations in a market this size. About 28.8 percent of listings, 98 of the 340 in the sample, run a 30-night-or-longer minimum stay, a booking-policy choice rather than an occupancy signal, and one that shouldn't be read as evidence a third of the market's listing stock sits empty long-term.
A Regulation Scrape Is Not a Permit
AirROI Low or any similar third-party regulation label is a scrape built from other operators' listings, not a reading of Bay St. Louis's actual city ordinance. Treating that label as confirmation that no permit is required, or that a permit fee doesn't apply, is how a host ends up advertising a stay the city doesn't actually recognize. The correct sequence is the reverse: call Planning at 228-466-5516, confirm the current fee and process, and only then build the rest of the startup budget around a confirmed answer.
Do not mix Vermilion's or Crystal Beach's fee schedules, regulatory processes, or revenue figures into a Bay St. Louis filing or budget, even though all three sit within a reasonable driving distance of each other along the broader Gulf Coast. Each town runs its own separate desk, and a listing scrape that groups them into one regional regulatory picture is not a substitute for the specific city's own confirmed process, phone number, and fee.
Do Not Average in Vermilion or Crystal Beach
Vermilion prints its own AirROI year at $29,012 across 78 listings, a separate Lake Erie market with no bearing on Bay St. Louis's Gulf Coast figures beyond a coincidental name overlap with a different Gulf town. Cite Bay St. Louis's $25,594 figure from its own 340-listing sample only, and keep Vermilion's number on a separately labeled line if it's mentioned in a comparison at all, since folding it into a Gulf Coast pricing memo would blend two markets with nothing meaningful in common beyond a shared name.
Crystal Beach published $44,416 from 131 listings, a materially different Gulf Coast market that shouldn't be blended into Bay St. Louis's own file either, despite sitting closer geographically than Vermilion. A buyer packet or pricing memo that averages Bay St. Louis, Vermilion, and Crystal Beach into one 'Gulf Coast' figure produces a number that describes none of the three towns accurately, and it's the kind of shortcut a careful diligence reviewer will catch and question, undermining confidence in the rest of the packet along with it.
What You Actually Spend Before Night One
Before spending on furniture, a Bay St. Louis startup budget should account for the confirmed permit fee from Planning, the specific parcel's eligibility status, and Mississippi sales tax, which can still apply to a stay under 30 days regardless of the property's permit status. This is not legal advice; confirm both the permit fee and the tax obligation directly with the relevant desks rather than assuming either from a listing-aggregator's regulation label or a neighboring town's schedule, and keep a dated record of both confirmations.
The furnishing budget itself should be sized to the town's own guest pattern: a typical 3.8-night stay booked about 60 days ahead, arriving primarily from New Orleans and Baton Rouge. That's a shorter average stay than some inland markets, which argues for a listing built around a strong first impression and specific, photographable landmark proximity, Old Town, the harbor, beachfront, or the marina, rather than amenities built for a month-long remote-worker guest this market's own data doesn't show arriving in meaningful numbers or booking with any regularity.
What a Startup Packet Should Carry
A complete Bay St. Louis startup packet cites the $25,594 typical year from 340 listings, the June-October-May strong months, January as the slowest, New Orleans as the top guest origin, a 3.8-night stay, a 60-day booking lead, and Planning's confirmed number, 228-466-5516, for permit verification. Label Vermilion's $29,012 and Crystal Beach's $44,416 as separate reference points if they appear at all, never averaged into Bay St. Louis's own figure or presented alongside it without a clear label.
Sales tax under 30 days, the current permit fee at Planning, and the parcel's eligibility status are the three items that belong at the top of any startup checklist, ahead of any furniture or photography line item. A host who confirms all three before spending on the rest of the budget is working from a foundation that actually matches what the city recognizes as a legal Bay St. Louis short-term rental.
Why 340 Listings Is a Meaningfully Large Sample
Bay St. Louis's 340-listing sample is large enough that a single unusual property, a seven-bedroom outlier or a newly listed home with an inflated introductory rate, doesn't swing the town's average the way it might in a much smaller market. That's genuinely useful for a host or buyer trying to gauge how much confidence to place in the $25,594 typical-year figure: a bigger sample generally means a more stable, more representative number, even as year-over-year revenue moved down 4.5 percent over the current window and supply held flat.
That size also means Bay St. Louis is less prone to the kind of single-listing distortion that shows up in smaller neighboring markets, which is worth keeping in mind when this town's figures get compared against a much smaller sample elsewhere on the Gulf Coast. A 340-listing average and a 90-listing average don't carry equivalent statistical weight even when the dollar figures happen to land in a similar range, and a buyer comparing multiple Gulf Coast towns should weigh sample size alongside the headline revenue number rather than treating every town's figure as equally reliable or equally stable from one extract to the next.
Building the First-Year Budget in the Right Order
The order that actually protects a new Bay St. Louis host's money: confirm the permit fee and process at Planning first, confirm the applicable Mississippi sales tax obligation second, and only then move to furnishing, photography, and listing setup. Each of the first two steps is a phone call, not a purchase, and skipping either one to move faster on the fun part of setting up a listing is how a host ends up with a fully furnished property and an unresolved compliance question sitting underneath it.
Once those two calls are made and documented, with a date and the name of whoever confirmed the answer, the furnishing budget itself should be built around the town's own guest data: a 3.8-night average stay, a guest base arriving primarily from New Orleans and Baton Rouge, and landmark proximity to Old Town, the harbor, beachfront, or the marina as the actual selling point, rather than amenities borrowed from a different kind of Gulf Coast market this town's own file doesn't support. That documentation step matters more than it might seem; a host who can point to a specific date and a specific desk contact when a permit question comes up later has a much easier conversation than one working from memory.
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Frequently Asked Questions
What is a typical Bay St. Louis STR year in this sample?
AirROI lists Bay St. Louis's typical year at about $25,594 from 340 listings, trailing twelve months August 2025 through July 2026, updated August 8, 2026. Average night was $279, occupancy was 31.5 percent, and year over year moved down 4.5 percent. Treat this as a market figure describing existing listings, and don't blend it with Vermilion's $29,012 or Crystal Beach's $44,416, both separate markets with their own files.
Can I average Vermilion into this year?
No. Vermilion published $29,012 from 78 listings, a separate Lake Erie desk that doesn't cancel into Bay St. Louis's own Gulf Coast year despite a coincidental name overlap with a different Gulf town. Cite the $25,594 figure from Bay St. Louis's 340 listings only, and confirm the current fee at Bay St. Louis Planning before advertising any property under either town's name.
Which months are strongest in Bay St. Louis?
The three strongest months are June, October, and May, with June the busiest. January is the slowest, and occupancy for the full year sits at 31.5 percent on a typical $25,594 year from 340 listings. A host should price the calendar off this confirmed pattern rather than a generic Gulf Coast summer assumption that doesn't match the town's own January hole.
Where do guests come from?
New Orleans is the top origin, followed by Baton Rouge. Typical stay is 3.8 nights, booked about 60 days ahead, with a superhost share of 62.4 percent. That combination of a short average stay and a high superhost bar means a listing needs a strong first impression and accurate photos more than it needs long-stay amenities this market's data doesn't support.
Does a low-regulation label mean there is no local permit?
No. That label is just a listing-site scrape, not a reading of the actual ordinance. Bay St. Louis requires a city short-term rental permit through Planning, 228-466-5516, published as a $100 form; confirm the current live fee directly at the desk rather than trusting AirROI's regulation label as permission to skip that call. This is not legal advice, and no specific fee should be assumed without confirming it directly.
Is a 30-night minimum the same as occupancy?
No. 28.8 percent of Bay St. Louis listings, 98 of 340, set a 30-night minimum, but actual typical stay is 3.8 nights. That's a platform filter reflecting a booking-policy choice individual hosts made, not booked occupancy, so a startup budget shouldn't assume that share of listing stock represents a filled long-term calendar rather than a different competing product.
What should a buyer packet carry?
Cite the $25,594 typical year from 340 listings, the June-October-May strong months, January as the slowest, New Orleans as the top guest origin, a 3.8-night stay, a 60-day lead, and Planning's number, 228-466-5516, for permit confirmation. Label Vermilion's $29,012 and Crystal Beach's $44,416 separately, never averaged into Bay St. Louis's own figure or presented as one regional number.
Is Crystal Beach the same market as Bay St. Louis?
No. Crystal Beach published $44,416 from 131 listings, a materially different Gulf Coast market; keep that figure on its own line. Bay St. Louis is $25,594 from 340 listings, with January as its slowest month; confirm Bay St. Louis's own permit desk, 228-466-5516, before advertising another town's property as if it were this one, and don't let the two towns' revenue figures drift together in a pricing memo.
Work with Crest & Cove Creative
Starting a Bay St. Louis short-term rental means confirming Planning's actual permit desk first, since a listing-site scrape isn't the same as the city's $100 permit form.
Crest & Cove prices and positions Bay St. Louis listings around the real town-desk requirements, not a guess. Start at crestcove.co/audit or call (256) 998-7502. Send the live listing draft and the facts you can actually cite.
Reach out at crestcove.co or (256) 998-7502.
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