Zoning, building permits and septic rules in St. Petersburg, Florida

St. Petersburg’s own rules

• Local zoningPresent

  Land inside St. Petersburg city limits

  • Zoning districts (NS, CRT, CRS, NMH) are set in Chapter 16 Land Development Regulations.

  “Development potential is slightly different within each district to respect the character of the neighborhoods.”

• Minimum lot sizeDistrict specific (with conditions)

  Residential lots in NS-1, NS-2 and NS-E Neighborhood Suburban single-family districts, St. Petersburg city

  • Nonresidential minimums differ (1.0 acre, 1.0 acre, 2.0 acres).

  NS-1 minimum residential lot area: >= 5800 sq ft · NS-2 minimum residential lot area: >= 8700 sq ft · NS-E minimum residential lot area: >= 1 acre

  “minimum lot area residential 5,800 sq. ft. 8,700 sq. ft. 1.0 acre nonresidential 1.0 acre 1.0 acre 2.0 acres”

• Lot coverageSpecified

  Residential building coverage in NS-1, NS-2, NS-E districts, St. Petersburg city

  • 0.60 building coverage allowed where the primary structure is one story.
  • Maximum impervious surface ratio 0.60 (NS-1, NS-2) and 0.40 (NS-E).

  maximum residential building coverage: <= 0.55 ratio (0.60 if primary structure is one story)

  “maximum residential building coverage (includes all enclosed structures) except where the primary structure is one story then a 0.60 building coverage is allowed 0.55 0.55 0.55 maximum impervious surface (site area ratio) 0.60 0.60 0.40”

• Manufactured homesLimited

  Manufactured homes in flood hazard areas, St. Petersburg city; a dedicated Neighborhood Suburban Mobile Home district (NMH) exists

  • Installation in regulated floodways and coastal high hazard areas is prohibited except replacement in an existing park
  • Licensed installer required

  “installation of manufactured homes in regulated floodways, and in coastal high hazard areas is prohibited, unless an installation is to replace an existing manufactured home that has not been substantially improved or substantially damaged in an existing manufactured home park.”

• Accessory dwellingsLimited

  Accessory dwelling units with single-family dwellings in districts allowed by the use matrix, St. Petersburg city

  • One ADU per single-family dwelling
  • Not before principal building construction commences
  • Not used as transient accommodation
  • Max 800 sq ft gross floor area and 67 percent of principal unit
  • 10 ft side setback for detached ADUs in NS districts (7.5 ft on alley)

  maximum ADU gross floor area: <= 800 sq ft (also not over 67 percent of principal dwelling floor area)

  “the gross floor area of any accessory dwelling unit shall not exceed 800 square feet and all areas under roof may not exceed 67 percent of the floor area of the principal dwelling unit.”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission; ask St. Petersburg or Pinellas County directly.

• Building permit — Building permits inside St. Petersburg city
• Owner-builder exemption — Owner-builder inside St. Petersburg city
• Building code adopted — Building code inside St. Petersburg city
• Inspections — Building inspections inside St. Petersburg city
• Certificate of occupancy — Certificates of occupancy inside St. Petersburg city

Each answer was extracted from an official source and independently re-checked against that source by a second reviewer. That is an evidence check, not legal advice. Rules change; confirm with the authority before you buy or build.

Off-grid gear

Going off-grid in St. Petersburg means bringing your own water and power. The kit we’d start with:

• Water Crystal Quest Filter any source — well, rain, or creek — to drinking-clean.
• Power Bluetti Solar generators and home battery backup for living off the grid.
• Septic Soil percolation test kit Run your own perc test before paying an engineer — the first thing a septic office asks about.
• Water Well water test kit Bacteria, nitrates, hardness — know what the well on a parcel is really pumping.

These are affiliate links — we may earn a commission, at no cost to you. As an Amazon Associate, Bolthole Index earns from qualifying purchases.