WorkspaceDiscoverMultifamily · Key West · Monroe County
1911 Seidenberg Ave, Key West
Key West duplex with separate meters and reported recent improvements. The listing describes legal two-unit use; verify that claim and the applicable rental licenses.
Recorded status: Broker page reported active; recheck availability. Checked: .
Dated listing record · recheck availability and legal unit count.
- Est. gross yield at asking
- 3.5% Estimate · rent potential ÷ asking price
- Asking price
- $1,250,000
Rent potential · Estimate: $3,680/moBroad HUD benchmark, not property-specific market rent or current collections.
- Estimated annual NOI
- $948 Before debt and capital reserves
- Estimated cap rate
- 0.1% Modeled NOI ÷ purchase price
- Est. cash flow / mo
- -$31 All cash · after reserves
Assumptions behind these estimates
Starting values for this brief. Change any of them in the interactive brief; your changes stay in your browser. Default values
| Input | Value | Basis |
|---|---|---|
| Total scheduled rent per month | $3,680 | HUD-based planning rent |
| Vacancy (%) | 5% | Matches planning allowance |
| Management (% of collected rent) | 8% | Matches planning allowance |
| Maintenance (% of total rent) | 5% | Matches planning allowance |
| Buyer annual tax assumption (% of price) | 2% | Matches planning allowance |
| Annual insurance | $5,640 | Matches planning allowance |
| Annual owner-paid utilities | $2,400 | Matches planning allowance |
| Monthly HOA or condo fees | $100 | Matches planning allowance |
| Other annual operating expenses | $1,200 | Matches planning allowance |
| Capital reserves (% of total rent) | 3% | Matches planning allowance |
| Down payment (%) | 100% | Matches planning allowance |
| Mortgage rate (%) | 7% | Matches planning allowance |
Unit mix & possession
Two separately metered 1 bed / 1 bath units across two levels.
- Reported units
- 2
- Reported listing area
- 1,119 sq ft
- Asking / reported sq ft
- $1,117
- Historical property tax / year
- $7,059
Historical tax is the seller’s bill; buyer taxes can change.
Broker info & key considerations To confirm
- Floor-area conflict: the listing reports 1,119 SF, while its public-record panel now shows 1,283 SF. The listing area is retained; reconcile with the official property card and survey.
- No current rents or executed leases are supplied in the reviewed source.
- Verify permitted unit count, licensing, wind/flood insurance and the buyer tax reset.
- Listing availability, legal units, lease collections and operating costs require independent confirmation.
Source evidence and diligence
Financial figures observed Sep 25, 2026. Reported income is not audited collections. Editable estimates, financing and saved assumptions are separate from these source facts.
Gross rental yield basis
Displayed whole-property scheduled rent × 12 divided by source asking price, not your saved offer. HUD-based planning rent: FY2027 HUD FMR for Monroe County, FL (NCNTY12087N12087), effective October 1, 2026. Documented bedrooms per offered unit: 1, 1. Published gross housing benchmark $3,980/month includes major utilities, excluding phone, cable/satellite TV and internet. Subtract $300/month ($150/unit) for assumed tenant-paid electricity; remaining owner-paid services use the separate displayed utility budget. This electricity amount is editable budgeting policy, not a verified allowance or conservative bound. Replace scheduled rent and utility inputs with leases, payer terms and local bills. The adjusted $3,680/month is a full-occupancy scenario, not a rental appraisal, lease offer, subsidy payment standard or eligibility decision. Full-occupancy potential before vacancy, operating costs, financing and income tax; not current collections, cap rate or cash return.
Sources
- 20 Oct floor-area conflict review · Compass MLS620075 / public-record panelSource observation · Oct 20, 2026
- Compass · Ocean Sotheby's International Realty · MLS 620075Source observation · Sep 25, 2026
Questions to resolve
- Obtain executed leases, tenant estoppels, deposit accounting and collection history.
- Reconcile the offered units, address and living area with title, permits and occupancy records.
- Obtain trailing expenses, buyer tax estimates and property-specific insurance quotes.
Similar properties
- 1306-1308 51st Street Gulf, Marathon: 2-unit multifamily, asking $990,000
- 3962–3964 No Name Rd, Big Pine Key: 2-unit multifamily, asking $925,000
- 10833 2nd Avenue Gulf, Marathon: 3-unit multifamily, asking $898,000
Florida property research
Research scope includes Miami-Dade, Broward, the Florida Keys and Flagler County. Published observations vary by market.
[1] Gross yield excludes costs and financing. Source figures are unverified; estimates use editable assumptions. Check current listing availability. County records are separate from listings. Saves stay in this browser; export a backup before clearing site data. Sources & methods