A finished barndominium at dusk with warm interior lighting glowing through its large windows.
Pinellas County Outside the HVHZ

Barndominium Builders in St. Petersburg, FL

St. Petersburg sits inside Florida's most densely populated county, and the honest answer to "how much land do I need" is: not much. Only 18 parcels in all of Pinellas County still carry an agricultural land-use classification, out of roughly 280,000 parcels total, so if acreage is what you want, our Ocala or inland Central Florida pages are the better fit. If you're building on a standard St. Petersburg lot, here's what actually governs that project: a 145 mph design wind speed, impact-rated glazing required on every opening countywide, and a permitting desk that belongs to the city, not the county, for most Pinellas addresses. Pinellas' population is now declining, driven in part by the back-to-back 2024 hurricanes, which is exactly the case for building the replacement home or shop-house to a higher standard than what it's replacing.

St. Petersburg at a glance

County
Pinellas County
Population
948,563
Also serving in Pinellas County
Clearwater
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Building conditions in St. Petersburg

What actually changes from one Florida city to the next: who issues the permit, what wind speed the structure has to be engineered to, and what the ground is like. These are the numbers your drawings have to satisfy.

Build conditions for St. Petersburg, Pinellas County: design wind speed 145 mph, outside the High Velocity Hurricane Zone. BUILD CONDITIONS ST. PETERSBURG, FL Pinellas CountyOUTSIDE THE HVHZWIND-BORNE DEBRIS ZONE DESIGN WIND SPEED 145 mphRisk Category II · Category III is 155 mph, Category IV 157PERMIT REVIEW CLOCK30 business daysF.S. 553.792 · fee drops 10% per day lateMULTIMODAL IMPACT FEEFrom $1,356 per homeCounty Schedule A, tiered by square footageWHO ISSUES THE PERMITSt. Petersburg Construction ServicesCity permits inside limits, county handles the rest
Build conditions for St. Petersburg, drawn from the sourced facts on this page. Every figure above is cited in the quick-facts panel below, with its source and vintage.
No real agricultural-acreage market here
Only 18 parcels in the entire county carry an agricultural land-use classification (land use codes 50-69), out of roughly 280,000 parcels countywide. If you're picturing a barndominium on raw acreage, Pinellas isn't that market, a standard 5,000-8,000 sq ft infill or teardown-rebuild city lot is. We build acreage properties in Ocala, Alachua, and our other inland markets; here, the realistic project is a compact shouse or steel-framed home and shop on a conventional lot.

Pinellas County Property Appraiser, 2021 Final Land Use Recap (pcpao.gov). The parcel count is consistent with the county's own near-buildout planning language.

Design wind speed
145 mph ultimate design wind speed for a house (Risk Category II). Risk Category I is 135 mph, Category III is 155 mph, Category IV is 157 mph. That's higher than every inland county we build in, Orange, Leon, Polk, and Alachua all sit under 140 mph, which is what you'd expect on a coastal Tampa Bay peninsula.

Pinellas County Construction Licensing Board (PCCLB), Local Technical Amendment to FBC §1609.3, 2023 (8th Edition) cycle, pcclb.com/pdf/lta/2023/building_1609.3.pdf.

Who issues your permit
The City of St. Petersburg's own Construction Services & Permitting Division handles permits inside city limits. Pinellas County's Building & Development Review Services only covers unincorporated land, home to roughly 36% of the county's approximately 950,000 residents. St. Petersburg is the largest of Pinellas' 24 municipalities and runs its own zoning and land development code, independent of the county's.

City of St. Petersburg Construction Services & Permitting Division, One 4th Street North, St. Petersburg FL 33701, 727-893-7231 (portal: actiononline.stpete.org); Pinellas County Building & Development Review Services, 727-464-3888; Pinellas County 'Unincorporated Areas' page (pinellas.gov/unincorporated-areas).

Two flood ratings, not one
Unincorporated Pinellas County holds a Community Rating System Class 2, described by the county as the highest class any Florida community has ever reached and top 1% nationwide, a 40% NFIP discount. The City of St. Petersburg itself carries a separate, less favorable Class 5: up to 25% off in the Special Flood Hazard Area, 10% outside it. Don't assume the county's headline number applies to a St. Petersburg address, it doesn't.

Pinellas County CRS page (pinellas.gov). St. Petersburg's Class 5 rating is drawn from flood-insurance industry sources citing the city's CRS participation. CRS classes are reassessed roughly annually, so we confirm the current class against FEMA's CRS Communities list before finalizing a client's insurance estimate.

Hurricane Milton's real number here was rain, not wind
101 mph wind gust at Albert Whitted Airport in St. Petersburg during Hurricane Milton, October 2024, well below the county's 145 mph design wind speed. The bigger story was rainfall: roughly 18-19 inches recorded at Albert Whitted, over 20 inches in parts of the city, and a peak rate of 5.09 inches in a single hour. Milton reached Category 5 intensity in the Gulf before making landfall as a Category 3 on an unusual west-to-east track.

National Hurricane Center Tropical Cyclone Report, Hurricane Milton (AL142024), nhc.noaa.gov/data/tcr/AL142024_Milton.pdf.

Population is declining, not growing
Pinellas County lost about 11,834 residents between July 2024 and July 2025 (960,397 down to 948,563), the second-largest numerical county population decline in the country that year, behind only Los Angeles County. Net domestic out-migration (roughly 9,200 more people left than arrived) and natural decrease both outweighed international in-migration. Multiple outlets tie the outflow directly to the back-to-back 2024 hurricanes, Helene and Milton, plus rising insurance and housing costs, which is exactly the case for building the replacement structure to a higher standard than the one it's replacing.

U.S. Census Bureau Vintage 2025 county population estimates, press release 26 March 2026 (census.gov/newsroom/press-releases/2026/2025-popest-metro-micro-counties.html), reported by WUSF, Fox13, and Bay News 9.

Also worth knowing before you build in St. Petersburg

Impact windows aren't just for waterfront lots
The entire county sits in the wind-borne debris region, not just a strip near the coast. Because Pinellas' 145 mph design wind speed already clears the 140 mph statewide trigger on its own, every opening on every parcel needs impact-rated glazing or shutters, coastal or inland. Same pattern we've confirmed in Lee County (Cape Coral) and all of Broward.

FBC §1609.2/§1609.1.2 wind-borne debris region triggers, applied to the PCCLB's confirmed 145 mph Risk Category II design wind speed.

The old agricultural zoning district is a legal relic, not a market
Unincorporated Pinellas still has an A-E (Agricultural Estate Residential) zoning district on the books, with a 2-acre minimum lot. Almost nothing in the county actually uses it that way anymore, see the 18-parcel figure above. Any 2-acre A-E lot you find is more likely a legacy estate parcel than working farmland, and there are very few of them left.

Pinellas County Code of Ordinances, Chapter 138, Article IV (A-E district); Pinellas County Zoning District Summary Guide (pinellas.gov).

Florida's most densely populated county
274 square miles of land (the rest of the county's 608 sq mi total is Tampa Bay and the Gulf), holding roughly 950,000 people, about 3,500 people per square mile of land. The county's own planning documentation describes Pinellas as near-buildout, with what vacant land remains characterized as small, scattered, irregular parcels rather than any large contiguous tract.

U.S. Census Bureau QuickFacts; Pinellas County Planning Department comprehensive plan materials (plan.pinellas.gov).

Multimodal impact fee
The county's tiered Schedule A single-family rate runs $1,356 for a home under 1,500 sq ft, $1,679 from 1,501-2,499 sq ft, and $2,066 at 2,500 sq ft and up.

Pinellas County Code of Ordinances, Chapter 150 (Impact Fees), Article II §150-40. We confirm the current rate with St. Petersburg Construction Services (727-893-7231) or Pinellas BDRS before finalizing a client's budget.

Building permit fee schedule
Pinellas County's unincorporated-area building permit fee runs roughly $9 per $1,000 of valuation under $1 million (with a $100 minimum), dropping to $8 per $1,000 above $1 million. St. Petersburg issues permits under its own fee schedule; we confirm the current city rate with Construction Services & Permitting before finalizing a project budget.

City of St. Petersburg fee schedule PDF (cms5.revize.com), dated November 2017; unincorporated county figure per a March 2026 secondary summary. We pull the current St. Petersburg schedule directly from Construction Services & Permitting (727-893-7231) before quoting a number.

Ground conditions
Pinellas soils are typical Florida flatwoods: predominantly poorly-to-somewhat-poorly drained sand with a shallow seasonal high water table, commonly 10-40 inches below the surface depending on the map unit and season. Foundation design, commonly slab-on-grade with engineered fill, or raised, needs to account for that site-by-site.

USDA-NRCS Soil Survey of Pinellas County, Florida (certified/tabular data dated 2 October 2017 per NRCS Web Soil Survey). Series named include Myakka, Immokalee, EauGallie, Pompano, Adamsville, Astatula, Oldsmar, Wauchula, Wabasso, and Terra Ceia.

Outside the High Velocity Hurricane Zone
Only Miami-Dade and Broward counties are the HVHZ. Pinellas is outside it, and its 145 mph design wind speed is a meaningfully less exotic code regime than what those two counties require.

Florida Building Code 8th Edition (2023), Section 202 definitions.

Permit review deadline
30 business days for a single-family home, or the jurisdiction has to cut the permit fee by 10% per business day it runs late. Applies in St. Petersburg and unincorporated Pinellas exactly as it does statewide, no local carve-out found.

F.S. 553.792, as amended by HB 267 (2024), effective 1 January 2025; F.S. 553.791 (private provider route) applies the same way.

St. Petersburg's ADU ordinance fits the shop-house angle
St. Petersburg has an active accessory dwelling unit ordinance, relevant if you're thinking about a shop-plus-living-quarters build on a standard city lot rather than a standalone barn. We confirm the specific size and setback rules with the city's Construction Services & Permitting Division as part of feasibility.

City of St. Petersburg, stpete.org/residents/housing/homeowners/accessory_dwelling_units.php.

An excavator grading a compacted building pad on a cleared lot, with survey stakes and a drainage swale visible.
Below the slab

The expensive surprises are in the ground, not the building

Most of Pinellas County rates poorly for dwellings in the soil survey, and the reason is water sitting close to the surface rather than weak ground. That makes the pad elevation and the drainage plan the two line items most likely to move your budget. We price the dirt before we price the building.

What we build in St. Petersburg

Every service we offer is available across Pinellas County, from a shell kit you erect yourself to a finished home we hand you the keys to. What a build costs depends far more on the parcel than on square footage, so we price against your land rather than publishing a rate card.

See all nine services

What a build looks like

Three stages every St. Petersburg project passes through, from a raw parcel to a finished home. Site work first, because that is where the budget is decided.

Aerial view of an undeveloped rural Florida lot with cleared grass, pine scrub and a sandy access track.
Stage one

The parcel

Zoning, setbacks, flood zone and utility access get checked before anything is drawn.

An excavator grading a compacted building pad on a cleared lot, with survey stakes and a drainage swale visible.
Stage two

Pad and permit

Clearing, grading and a compacted pad, while the submittal works through Pinellas County.

A finished barndominium at dusk with warm interior lighting glowing through its large windows.
Stage three

Frame to finish

Shell erected and dried in, then systems, insulation and interior finish through to CO.

Those are the rules for Pinellas County. Tell us what you want to build and we will draw it to them.

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Where we build around St. Petersburg

Pinellas County and the rural land around it. The buildable acreage for a project this size usually sits outside the city limits, which is frequently what changes who issues your permit.

Our St. Petersburg service area, covering Pinellas County and the surrounding rural acreage. We build across this area from our office in Lake Mary, FL — this map marks the territory we serve, not a branch location.

Keep reading

The questions that usually come next once you know what St. Petersburg allows.

Barndominium Cost Guide

Sourced per-square-foot ranges by tier and by size, with a calculator built on the same figures.

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Is It Legal in Florida?

Classification, zoning, the HOA gate, and the agricultural exemption that does not cover a home.

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How Long Does It Take?

Census build-duration data, and the Florida statute capping permit review at 30 business days.

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Sources for this page

The primary documents behind the St. Petersburg figures above. We would rather you checked them than took our word for it.

Nearby areas we build in

Close to St. Petersburg, though the permitting authority and wind requirements can differ once you cross a county line.

Clearwater

Pinellas County
Tampa

Hillsborough County

Building in St. Petersburg: common questions

10 questions we get asked most often about building in St. Petersburg. If yours is not on the list, ask it directly.

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Can I build a barndominium on acreage in St. Petersburg?
Functionally, no. Only 18 parcels in the entire county still carry an agricultural land-use classification, and Pinellas is the most densely populated county in Florida on just 274 square miles of land, there isn't a working acreage market here the way there is in Ocala or inland Central Florida. What we can build instead is a compact shouse or steel-framed home and shop on a standard St. Petersburg city lot, typically in the 5,000 to 8,000 sq ft range, through an infill build or a teardown-rebuild. If acreage is genuinely what you want, we'd point you toward Marion, Alachua, or one of our other inland markets rather than try to force a rural project into Pinellas County.
What wind speed does my building have to be engineered to?
145 mph ultimate design wind speed for a house, which is Risk Category II. That's a coastal Tampa Bay number, meaningfully higher than the inland counties we build in, Orange, Leon, Polk, and Alachua all sit under 140 mph. Higher-risk structures scale up from there: 155 mph for Risk Category III, 157 mph for Category IV. We confirm the exact figure with the Pinellas County Construction Licensing Board before an engineer stamps a design.
Do I need impact windows if I'm not right on the water?
Yes. Pinellas is unusual in that the entire county, not just a one-mile coastal strip, sits in the wind-borne debris region. That's because the county's 145 mph design wind speed already clears the 140 mph threshold that triggers the requirement statewide, regardless of distance to the coast. Every glazed opening on every parcel in Pinellas County needs impact-rated glass or approved shutters, the same pattern we've confirmed in Lee County and all of Broward.
Who issues my permit, the city or the county?
Most likely the city. St. Petersburg's Construction Services & Permitting Division handles anything inside city limits, and St. Petersburg is by far the largest of Pinellas County's 24 municipalities, roughly 64% of the county's population lives inside a municipality rather than unincorporated land. Pinellas County's Building & Development Review Services only has authority over unincorporated parcels. We check jurisdiction against the parcel's actual legal boundary rather than assume from the mailing address.
What's my flood insurance situation in St. Petersburg?
Expect a Community Rating System Class 5 for a St. Petersburg address, worth up to 25% off inside the Special Flood Hazard Area and 10% outside it. That's a materially different number than unincorporated Pinellas County's own Class 2 rating, one of the best in the country, so don't let anyone quote you the county's discount for a project actually inside city limits. We verify the current class against FEMA's CRS communities list before a client budgets around it.
How bad was Hurricane Milton here?
At Albert Whitted Airport in St. Petersburg, Milton produced a 101 mph wind gust, well under the county's 145 mph design wind speed, so a properly engineered structure had real margin to spare. The bigger number was rain: roughly 18 to 19 inches recorded at Albert Whitted, over 20 inches in parts of the city, and a peak rate of just over 5 inches in a single hour. For Pinellas, drainage and flood performance are at least as important a design conversation as wind resistance.
Should I be worried about the population decline in Pinellas County?
It's real, and worth understanding rather than ignoring. Pinellas lost close to 11,834 residents between July 2024 and July 2025, the second-largest numerical county decline in the country that year, driven mostly by people leaving after the back-to-back 2024 hurricanes and rising insurance costs. We don't read that as a reason to avoid building here, we read it as the argument for building the next structure on a hard-to-replace lot to a standard that actually holds up, rather than repeating what was there before.
What do impact fees add up to?
Pinellas County's tiered Multimodal Impact Fee schedule runs $1,356 for a single-family home under 1,500 sq ft, $1,679 from 1,501 to 2,499 sq ft, and $2,066 at 2,500 sq ft and above. We confirm the current, applicable rate directly with St. Petersburg Construction Services or Pinellas BDRS before it goes into a client's budget.
What's the ground like in St. Petersburg?
Typical Florida flatwoods: predominantly poorly-to-somewhat-poorly drained sandy soils with a shallow seasonal high water table, commonly landing somewhere between 10 and 40 inches below the surface depending on the specific soil series and the season. Series across the county include Myakka, Immokalee, EauGallie, and several others. That shallow water table is a real factor in foundation design, whether slab-on-grade with engineered fill or a raised foundation, so a site-specific soils report comes before final design, not after.
Can I put a shop or ADU on my lot instead of a standalone barn?
That's the realistic version of the barndominium idea in St. Petersburg. The city has an active accessory dwelling unit ordinance, which supports a shop-plus-living-quarters build on a standard city lot even without acreage. We confirm the specific size and setback rules with the city's Construction Services & Permitting Division as part of feasibility before a client commits to a design around it.

Building in St. Petersburg?

Start with the plan. Tell us what you want to build and we will draw it, then confirm what Pinellas County will actually let you put on the parcel and what wind load it has to meet. That conversation costs nothing.

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