Duplex with Detached Permitted
For Sale
$569,000
3631 4th Ave N, St Petersburg, FL 33711
Two separate units on a large lot, featuring a fully permitted 2021 ADU with central A/C and separate electrical meters.
Property Size1,610 SF
Price / SF$353.42
Days on Market39
Property Features for 3631 4th Ave N
General Information
Standard status
Active
Size
1,610 SF
Property subtype
Residential Income
Site & Location
Road Access
Yes
Utilities to Site
Yes
Amenities
hurricane impact windows
aluminum gutters
deck
skylight
fenced yard
granite countertops
Building Details
Buildings
2
Tenancy
Multi
Listing Agency:
IMAGINE REALTY LLC
(941) 204-3505
Listed By:
Carrie James
(941) 204-3505
Source:
Exprealty
Added: Jun 27
Changed: Jul 31
Last Checked: Jul 31 at 6:21AM
Displayed information is deemed reliable but is not guaranteed and should be independently verified. All listing content including descriptions, pricing, images are the copyrighted material of IMAGINE REALTY LLC
Investment Insights
Based on property information with market context.
Duplex income property with a main home plus a fully permitted detached accessory dwelling unit (ADU). The renovated main home is a 2-bedroom, 2-bath 1941 residence with a small office/bonus area, restored original oak floors, new tile in the office and kitchen, granite countertops, and renovated bathrooms. It also includes a large yard with a mango tree, with the yard area fenced off from the ADU. The home has a deck and hurricane impact windows.
The detached, fully permitted ADU was built in 2021 to category 4 hurricane code and totals 600 SF. It includes a full bath and a spacious utility room with a stacked washer/dryer, plus tile flooring, granite countertops, and central A/C. The ADU has a front entrance facing the rear alley for privacy, and it has designated parking adjacent to the cottage. The main house and cottage share a water meter, and both units have separate electrical meters.
Recent upgrades include a new roof and aluminum gutters in 2021, a skylight in the kitchen, and new central A/C in 2024. The property was tented for termites in 2024 in the garage. The lot is over 8,500 SF, and the ADU currently has a 1-year lease in place; tenant pays utilities. Room sizes to be verified by buyer.
The detached, fully permitted ADU was built in 2021 to category 4 hurricane code and totals 600 SF. It includes a full bath and a spacious utility room with a stacked washer/dryer, plus tile flooring, granite countertops, and central A/C. The ADU has a front entrance facing the rear alley for privacy, and it has designated parking adjacent to the cottage. The main house and cottage share a water meter, and both units have separate electrical meters.
Recent upgrades include a new roof and aluminum gutters in 2021, a skylight in the kitchen, and new central A/C in 2024. The property was tented for termites in 2024 in the garage. The lot is over 8,500 SF, and the ADU currently has a 1-year lease in place; tenant pays utilities. Room sizes to be verified by buyer.
Key Highlights
- Detached, fully permitted ADU built in 2021 totaling 600 SF
- Main home renovated 2 bed, 2 bath with small office/bonus area
- Separate electrical meters for main home and ADU; shared water meter
Financial Insights For Multifamily LT 5
Simulate Cap Rate and NOI
NOI Build-Up
- Vacancy
- income lost from leasable area expected to sit empty during the year — subtracted from gross rent.
- EGI (Effective Gross Income)
- gross rent minus vacancy losses — the realistic income before paying operating costs.
- OpEx (Operating Expenses)
- recurring costs to operate the property (property tax, insurance, utilities, maintenance, management) — excludes financing and capital improvements.
- NOI (Net Operating Income)
- income a property generates after operating costs but before financing and taxes.
| Component | $ | $/SF |
|---|---|---|
| Gross rent | $28.8k | $17.88 |
| − Vacancy | −$1.9k | −$1.21 |
| EGI | $26.8k | $16.67 |
| − OpEx | −$8.1k | −$5.00 |
| NOI | $18.8k | $11.67 |
1,610 SF · lease $17.88/SF/yr · vacancy 6.74% · expense 30.00%
Alternative Uses
Best Use
Multifamily LT 5
$268.5K
$234.9K – $313.2K
NOI $18,793 @ 7.0% cap · market cap 3.30%
Second Best
Apartment 5plus
$211.5K
$185.1K – $246.8K
NOI $14,807 @ 7.0% cap · market cap 2.60%
Theoretical Best
Office A
$418.8K
$366.4K – $488.6K
NOI $29,314 @ 7.0% cap · market cap 5.15%
Zoning and permitted uses should be independently verified with authorities.
Property Analytics
Current Use
Lease Details
Multi-tenant
Tenancy
Yes
Paved road access
Yes
Utilities to site
Location Intelligence
Trade Area within ½ mile
1,884
Businesses Nearby
Explore this area
Business Placement
Demographics for 33711, FL
20,121
Population
9,522
Households
2.1
Avg Household Size
41
Median Age
32%
College-Educated
96%
High-School Grad
4.7 sq mi
ZIP Area
4,281
Density / Sq Mi
$68,295
Median Household Income
$27,156
Median Earnings
$1,819
Median Rent
$253,100
Median Home Value
Market
Properties on Market for Duplexes in Pinellas County
Vacancy Rate% for Multifamily in South region
Questions? Ask Rey
Realmo’s AI knows this listing — price, zoning, demand, history. Ask anything.
Frequently Asked Questions
What type of property is this?
Duplex - Two separate units on a large lot, featuring a fully permitted 2021 ADU with central A/C and separate electrical meters.
Where is this duplex located?
The property is located at 3631 4th Ave N St Petersburg, FL.
What is the asking price?
The asking price for this property is $569,000.
What are key features of this property?
This property features: Detached, fully permitted ADU built in 2021 totaling 600 SF; Main home renovated 2 bed, 2 bath with small office/bonus area; Separate electrical meters for main home and ADU; shared water meter
