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Pinellas County

Tarpon Springs ADUs Sized to the House You Already Have

In Tarpon Springs a bigger main house supports a bigger ADU, so measure the home before settling on the size of a parent's cottage. The city caps an ADU at 600 square feet or 20 percent of the primary structure's floor area, whichever is greater, one per parcel.

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62The age at least one parent or grandparent must have reached for the living quarters reduction in Florida Statute 193.703
50%Of a structure's market value, the cost at which 44 CFR 59.1 makes an addition a substantial improvement
16 townsCovered across Hillsborough, Pinellas and Pasco counties, each with its own local rules set out on its page
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Request a quote in Tarpon Springs

Who the space is for, whether it needs a kitchen, and the address. With those three answers we can say which city or county rules govern the lot before a contractor draws anything.

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Five short questions about who the space is for and what it needs to hold, then where to reach you. Most people finish in about a minute.

Question 1What are you thinking of building?

Pick the closest. If you are not sure yet, that is exactly what we help sort out.

Question 2Who will live in it?

This matters more than it sounds. In Florida the answer can change the property tax on what you build.

Question 3Does the new space need its own kitchen?

In Florida law a space with its own kitchen, bathroom and bedroom is a second dwelling, and each city and county decides whether one is allowed on your lot.

Question 4Is the house in a flood zone?

In a flood zone, a large enough addition can mean the whole house has to meet today's flood rules. Your insurance declarations page or the county flood map will say.

Question 5When does the space need to be ready?
About you, and the house the space would join

Who should we ask for?

How can we reach you?

We call to confirm the details before anyone is sent out.

Where is the property?

The contractor match is by property, not by person, so the street line matters.

Anything else we should know?

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Planning

How Tarpon Springs' 20 percent rule sets the ADU size

The arithmetic is simple: the 20 percent rule only helps above 3,000 square feet, so a 3,500 square foot home allows a 700 square foot unit while a smaller house stays at 600. The other conditions matter as much. The primary home must be owner-occupied, the unit may not have its own metered utility connection, and a restrictive covenant is recorded. Tarpon Springs runs its own building department. Three in ten residents are 65 or older. Flood is a live question near the water: the city's NFIP record holds 1,415 claims, 717 of them in 2024, so pull the parcel's FEMA letter from the Property Appraiser before the addition is priced against the home's value.

A quiet Tampa Bay street of single-story ranch houses near a canal
Next Step

How many square feet is the Tarpon Springs home?

Above 3,000, the 20 percent rule gives more than 600 square feet. Tell us the size and we will tell you the ceiling before any design is drawn.

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Availability

Cottages and in-law suites arranged in Tarpon Springs

In-Law Suite Additions

Add a bedroom, a bathroom and a sitting room onto the house so a parent can live with you and still close a door of their own, planned so the kitchen decision does not turn it into a second dwelling by accident.

In-Law Suites in Tarpon Springs →

First-Floor Primary Suite Additions

Put a bedroom and a bathroom on the ground floor for someone who can no longer manage the stairs, without the addition pulling the whole house under current flood rules.

First-Floor Suites in Tarpon Springs →

Detached ADUs and Backyard Cottages

Put a small, separate home in the backyard for a parent, close enough to help and far enough for their own front door, under the rules that actually govern the lot.

Detached ADUs in Tarpon Springs →
Licensed and insured Florida contractorsVetted local contractors licensed by the State of Florida and insured for the work, who price and contract it themselves
The three rules checked for your addressThe kitchen, the flood line and the county tax rule looked at before any contractor is asked for a number
Told when an addition is not the answerIf a first-floor room or a bathroom change inside the house would do, you hear that before anyone draws a suite
Local Detail

Tarpon Springs' ADU definition and 2024 flood claims

A wide doorway with no threshold and a lever door handle

Tarpon Springs defines an accessory dwelling unit as up to 600 square feet or 20 percent of the primary structure's floor area, whichever is greater, one per parcel, with the primary dwelling owner-occupied, no separate metered utility connection, and a recorded restrictive covenant.

Source: City of Tarpon Springs (Municode), accessed 2026-09-23

St. Petersburg, Clearwater, Largo, Pinellas Park, Dunedin, Seminole and Tarpon Springs each operate their own building departments, per the Pinellas County Construction Licensing Board's directory updated January 2025.

Source: Pinellas County Construction Licensing Board, accessed 2026-09-23

The 2020-2024 American Community Survey estimates Tarpon Springs's median age at 55.4, with 30.0 percent of residents aged 65 or older and 34.4 percent aged 62 or older, compared with 26.4 percent aged 65 or older in Pinellas County. Of its 13,421 housing units, 39.6 percent were built before 1980 and 17.2 percent in 2000 or later.

Source: U.S. Census Bureau, American Community Survey, accessed 2026-09-23

OpenFEMA's redacted NFIP claims data (as of September 2026) records, by NFIP community, with records beginning in 1978: St. Petersburg 16,189 claims (8,670 in 2024, $1,266.6 million paid in total); Clearwater 2,951 claims (1,472 in 2024, $231.5 million paid in total); Dunedin 1,601 claims (791 in 2024, $123.0 million paid in total); Tarpon Springs 1,415 claims (717 in 2024, $56.3 million paid in total); Largo 781 claims (497 in 2024, $78.6 million paid in total); Pinellas Park 895 claims (228 in 2024, $15.9 million paid in total); Oldsmar 776 claims (454 in 2024, $40.5 million paid in total); Seminole 223 claims (180 in 2024, $13.9 million paid in total); Safety Harbor 147 claims (61 in 2024, $5.2 million paid in total).

Source: Federal Emergency Management Agency (OpenFEMA), accessed 2026-09-23

The Pinellas County Property Appraiser publishes a FEMA/WLM letter for each parcel, reached from the Quick Pick Tool box on the parcel page, showing the structure value used for 50 percent or 49 percent determinations.

Source: Pinellas County Property Appraiser, accessed 2026-09-23

Next Step

Send the Tarpon Springs address and who is moving in

We match the job to a licensed contractor and flag the shared meter and the recorded covenant at the start, not at inspection.

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