How Much Does Room Addition Cost in St. Petersburg, FL?
St. Petersburg pricing is near the national average. Updated for 2026.
Based on local labor rates, varied climate conditions, and St. Petersburg's diversified economy.See our methodology
Room Addition Pricing in St. Petersburg, FL
In St. Petersburg, room addition costs are 2% above the national average, reflecting the city's diversified-driven economy. The balanced labor market means you have decent options when shopping for quotes. Most residents with a population base of 260K find the pricing competitive relative to the local cost of living.
Local climate plays a direct role in room addition costs here. Hot humid summers drive HVAC and pest control demand; hurricane risk in coastal areas.
Market-specific factors matter in St. Petersburg: growing market with competitive contractor rates.
St. Petersburg has moderate permitting requirements. Depending on the scope of your room addition project, you may need local permits. A licensed contractor will handle the permitting process as part of the job in most cases.
St. Petersburg vs National Average
What Affects Room Addition Cost in St. Petersburg?
Size
Small (100 sq ft): $15,000-$25,000. Average (200 sq ft): $30,000-$50,000. Large (400+ sq ft): $60,000-$100,000+
Room Type
Basic bedroom: $20,000-$40,000. Bedroom + bathroom: $35,000-$65,000. In-law suite: $50,000-$100,000+
Per Sq Ft
Budget: $80-$150/sq ft. Mid-range: $150-$250/sq ft. High-end: $250-$400+/sq ft
St. Petersburg Market Conditions
growing market with competitive contractor rates
Local Climate Impact
hot humid summers drive HVAC and pest control demand; hurricane risk in coastal areas
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Tips to Save on Room Addition in St. Petersburg
- 1.A bump-out (extending an existing room 2-4 feet) costs $5,000-$15,000 — much less than a full addition
- 2.Building over an existing garage or patio saves on foundation costs
- 3.A dormer addition (expanding attic space) costs 30-50% less than a ground-floor addition
- 4.Act as your own general contractor if you have experience — save 15-25% on management fees
📈 Room Addition in St. Petersburg Cost Trends (2020–2024)
Prices have increased +17.7% over the last 5 years
| Year | National Avg | YoY Change |
|---|---|---|
| 2020 | $38,988 | — |
| 2021 | $40,625 | +4.2% |
| 2022 | $43,266 | +6.5% |
| 2023 | $44,477 | +2.8% |
| 2024 | $45,900 | +3.2% |
Based on national averages adjusted for annual inflation. Actual costs vary by location and project scope.
💬 What Did You Pay?
Real costs reported by homeowners for Room Addition in St. Petersburg
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Frequently Asked Questions
Does a room addition increase home value?
Yes, though ROI varies: 50-65% for a standard room addition, 60-75% for a bedroom + bathroom addition. The value also depends on whether the addition fits the neighborhood — over-improving for your area yields lower returns.
How long does a room addition take?
Typical timeline: 2-4 weeks for permits and planning. 8-16 weeks for construction. Total: 3-5 months. Complex additions with full bathrooms or custom features can take 6-12 months.
Why does room addition cost different in St. Petersburg than other cities?
St. Petersburg's costs reflect local labor rates driven by the diversified economy, varied climate conditions that affect materials and scheduling, and moderate permitting requirements. The balanced labor market also influences competitive pricing.
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