811 Olivia Street, Key West, FL 33040
As of October 15, 2026, 811 Olivia Street in Key West is listed at $2,250,000. That is 45% above Key West's median closed sale of $1,550,000 over the last 12 months (31 recorded sales). It came to market within the past week. Listing facts: built in 1890, no HOA. Figures are from the MLS record and county data; deemed reliable but not guaranteed.
- No CDD assessment on record
- Built 1890 · 136 yrs
- Active listing
- No HOA reported by the listing (confirm)
About this home
Historic Old Town Charm Meets Modern Luxury. Situated next to the iconic Key West Cemetery, this legal duplex sits proudly on the island's highest point, offering an unbeatable location with unmatched peace of mind. With the original Conch House built in the late 1800s, this historic estate captures the classic romance of classic island architecture while providing a passive income opportunity.
It is the ultimate configuration for a buyer looking to live the island dream in a beautiful residence while utilizing the separate unit as a legal rental to offset living costs. The main house is a spacious sanctuary featuring 4 bedrooms and 3 bathrooms. Every room blends historic character with modern comfort, offering an airy layout perfect for relaxation or entertainment.
Steps away, the independent unit is a beautifully efficient studio apartment. This legal secondary unit serves as a desirable rental asset, an independent guest suite, or a private home office, adding incredible flexibility and value in a market where legal duplexes are highly coveted. While the property retains its rich late-19th-century soul, it also functions with the reliability of new construction.
The entire property underwent a meticulous top-to-bottom renovation from 2022 to 2025, modernizing every major component. Upgrades include a new roof (2022), all new plumbing (2024), fully updated electrical systems (2024), attic insulation (2025), and a brand-new HVAC system (2024). Calling this property home means enjoying a quiet backdrop and unique neighborhood charm.
You are just a short walk or bike ride away from world-class dining, vibrant nightlife, and pristine beaches. The driveway provides off-street parking for 1 vehicle.
All 51 photos
Description provided by Last Key Realty, Inc (KW) and reproduced from the MLS; not independently verified.
Every fact, sourced
Listing data, public records, our calculations, and what to verify — each fact shown once. Estimates and calculations shown are for general information only, are not appraisals or advice, and should be independently verified.
Listing facts MLS
Public records & third-party data
Calculated estimates
Buyer should verify Buyer verify
Estimated monthly payment
- Principal & interest $12,463/mo 80%
- Taxes $1,969/mo 13%
- Insurance $1,221/mo 8%
$15,652/mo at 20% down, 30-yr @ 7.4% · edit any field to update.
Editable estimate — not a loan offer. Estimates only; see data & estimate notes.
What it really costs to own 811 Olivia Street
The parts of the monthly number a mortgage calculator leaves out, from this listing's MLS record, the county tax roll, Citizens and FEMA. Property facts only.
| HOA dues | The listing states there is no HOA. |
|---|---|
| Home and flood insurance | The average Citizens Property Insurance premium in Monroe County is $4,380/yr (1,542 policies, Citizens detail by county, April 2026); private-market quotes differ by roof age, wind mitigation and distance to the coast. The page's modeled range for this home is $10,500–$21,000/yr; neither is a quote. |
| Roof and age | Built in 1890. An original roof would be about 136 years old; under Florida's 2022 reform (SB 2-D) carriers may require an inspection past 15 years, so budget for a roof report and ask for the roof permit date. |
Flood zone & elevation
Sourced environmental data for the parcel. Confirm with FEMA and your insurer.
Not yet verified for this address. Look up the parcel at msc.fema.gov before relying on any flood assumption.
Approximate parcel elevation from USGS; confirm exact elevation with a survey.
Monroe County is on the Florida coast; wind coverage is a major part of the premium. Premiums and coverage vary by home (roof age, wind mitigation, claims history); obtain a quote from a licensed insurer.
Natural hazard risk
FEMA National Risk Index for Monroe County, FL: overall Relatively Moderate. Ratings compare this county with every county in the United States for expected annual loss from each hazard.
Source: FEMA National Risk Index (county level, hazard risk ratings only). Ratings describe the county, not this parcel; the flood zone shown above is parcel-specific. Verify insurance requirements with your lender and agent.
Internet & broadband
Address-level fiber service is not confirmed for this home. Check the FCC National Broadband Map (broadbandmap.fcc.gov) or the provider for this address.
Cable broadband is common in Florida and Georgia towns but not confirmed for this address; verify with the provider.
5G home internet and satellite service depend on the exact location; check coverage for this address.
Pricing & the Monroe County market
How this home is priced against recent nearby sales, and where Monroe County has been over 25 years. Momentum Research analysis of Florida Keys MLS records; closed sales, deemed reliable but not guaranteed. Estimates only; see data notes.
Median sale price by year
12-month median closed price, 2012–2026.
Market Heat by year (0–100)
Momentum Market Heat, 2013–2026. Now 42 (normal).
This home’s history
- 1890BuiltPer public record
- Oct 15, 2026First seen on movewithmomentum.comObserved at $2,250,000
- NowActiveCurrently for sale
Build year is from public record. The MLS list date is approximate (today minus the cumulative days on market the MLS reports, which can span relistings). Other milestones reflect movewithmomentum.com’s own observations since we began tracking this listing and are not the MLS listing history; dates and prices are deemed reliable but not guaranteed.
Price & listing history
Building permits
Comparable recent sales
No closed sales of a similar home within about 10 miles in Monroe County in the last 18 months are in our MLS data set, so this page shows no comparable-sales median or automated estimate for Key West, FL. A licensed Momentum Realty agent can prepare a property-specific comparative market analysis on request.
Momentum Property Score
40/100 is below average across the objective indicators below. It reflects only those measures — not the home’s quality, condition, or desirability.
A 0-100 score built from objective property and market data: flood risk, insurance, pricing, supply, affordability, and recent sales. Higher means more measures line up in a buyer’s favor. It reflects only the factors below.
Coverage: 4 of 8 indicators had valid data for this home; indicators without data are left out, not scored as zero. Momentum Scores are objective, rules-based indicators computed from listing facts, public records, and recent comparable sales. They do not measure property condition, quality, or investment suitability, and they are not appraisals, valuations, investment advice, or judgments about a neighborhood or who should live there. Verify independently.
The Momentum read
Recent Monroe County sales closed near 92.3% of original asking.Why it matters: the community’s own record shows how far opening prices typically move, and how often buyers compete without financing.Momentum Research analysis of Florida Keys MLS records, community-level, 12 months ending September 20, 2026. Aggregates only; deemed reliable but not guaranteed.
What’s unique here: one of only 1167 active listings in Monroe County, no CDD assessment.
Jump to: About this home · Every number, sourced · Monthly cost · Flood & risk · History · FAQ
Updated October 15, 2026 · MLS facts carry their source; interpretation lines are Momentum Research · Data sources & freshness
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Listed by Last Key Realty, Inc (KW) · MLS # 621640
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Similar homes for sale near Key West
Active listings nearby at a comparable size and price. Listings held by brokerages other than Momentum Realty are marked with the listing broker. Deemed reliable but not guaranteed.
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Every home on Olivia Street: what is for sale, what sold and when, the homes and the communities along it.
Just listed: new homes for sale in the Florida Keys in the last 48 hours · updated hourly · RSS · The Florida Keys market today: new listings, price cuts, pendings
More on Monroe County
Explore Monroe County
Browse market data, schools, taxes, and homes for sale across the county.
Assigned schools
Schools currently assigned to this address in Monroe County, provided as neutral factual data. Assignments can change — confirm current zoning with the school district. This is not a statement about the home's suitability for any person or family.
City, county & community guides
Where this home sits, with links to the matching guides. General reference only.
Groceries, dining, and parks for this city — see the city guide.
View →Schools, taxes, and services are county-administered — see the county guide.
View →Amenities and HOA/CDD detail on the neighborhood guide.
Buyer research checklist
Items worth confirming for 811 Olivia Street, chosen from what the record shows. This is general guidance, not advice about this specific property.
- Built in 1890 (136 years): ask for the roof and HVAC replacement dates — insurers commonly ask for roof age on homes this old, and it changes the premium.
- The listing reports no HOA: confirm with the county record that no deed restrictions or mandatory association apply to this parcel.
- Look up the parcel on FEMA's Flood Map Service Center and confirm with your insurer whether flood insurance is required.
- Get a homeowners insurance quote for this specific address in Monroe County; a wind-mitigation inspection and, on older homes, a four-point inspection can change the premium.
- Confirm square footage and room dimensions independently.
- Order a survey to confirm lot boundaries and easements.
- Review permit history with the county.
- Property taxes: the estimate on this page (about $23,625/yr) assumes reassessment at the list price; the seller's current bill is not a guide Exemptions and portability change the actual bill — confirm with the county property appraiser.
- Confirm school zoning directly with the district.
Data sources & freshness
| Listing record | Florida Keys MLS, checked against the MLS hourly (last: October 15, 2026) |
| Comparable sales | Fewer than 3 defensible closed sales within about 10 miles in Monroe County — no medians or automated estimate shown |
| Flood zone & elevation | Not verified for this address — look it up at msc.fema.gov |
| Taxes & monthly cost | Typical county effective rate applied to the list price; an estimate, not a bill |
| Insurance figure | Modeled estimate; obtain a real quote before offering |
| Schools | 2025-26 district assignments; verify with the district |
Momentum Research lines are our own analysis of Florida Keys MLS records; MLS data is deemed reliable but not guaranteed. Estimates are informational, not appraisals or advice. Methodology: how Momentum scores are computed.
Frequently asked questions
How big is 811 Olivia Street and when was it built?
Per the listing record, 811 Olivia Street was built in 1890 and has 5 bedrooms and 4.0 bathrooms. Living area and lot size come from the MLS record and should be verified against the county property appraiser.
What community is 811 Olivia Street in?
811 Olivia Street is in Key West, Monroe County. Too few comparable closed sales exist nearby for this page to show local sales statistics; a licensed agent can prepare a comparative market analysis.
Does 811 Olivia Street have an HOA?
The listing reports no HOA. Confirm with the county record that no deed restrictions or mandatory association apply to the parcel.
Why might property taxes on 811 Olivia Street differ from the current owner's?
The estimate on this page (about $23,625 per year) assumes reassessment at the list price less the homestead exemption. Florida reassesses a home after it sells; for a homesteaded seller the Save Our Homes cap on their assessment does not transfer, and a buyer's own exemptions and portability are applied separately, so the two bills usually differ. Any tax figure shown here is an estimate, not the actual bill — confirm with the county property appraiser and tax collector.
Is 811 Olivia Street in a flood zone?
A flood designation has not been verified for this address. Look up the parcel on FEMA's Flood Map Service Center (msc.fema.gov) and confirm with your insurer.
Can I rely on the figures on this page?
No. Estimated taxes, insurance, payments, and any market or comparable-sales summary are opinions and estimates for general information only and should not be relied upon. Verify all information independently before making any decision.
See 811 Olivia Street in person
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Opinion & estimate — do not rely on this page. Any figure on this page that is not a verbatim fact from the listing or a public record — including estimated property taxes, insurance, CDD/HOA amounts, mortgage payments, comparable-sales summaries, and market statistics — is an opinion and estimate provided for general informational purposes only. These figures may be inaccurate or out of date, are not appraisals, valuations, or financial, legal, tax, or investment advice, and should not be relied upon. Do not make any purchase, offer, financing, or other decision based on this page. Independently verify everything — price, square footage, lot size, year built, taxes, CDD/HOA, flood status, school assignments, permits, and community rules — with the listing broker, the county, your lender, a licensed inspector, an insurer, and your own advisors before acting.
Estimate methodology. Tax estimates apply county millage to the list price (less the homestead exemption where the parcel is matched to the certified roll) and will differ from the actual assessed bill. Cost and market figures are derived from available data and simple calculations, not a professional appraisal. We make no representation that any estimate reflects fair market value.
Equal Housing Opportunity. Content on this page is compiled from public records, MLS data, and automated sources and may contain errors or be out of date. It is general information only, not a representation about any specific property, community, builder, or association. Verify information independently before relying on it. Momentum Realty supports the Fair Housing Act and does not discriminate on the basis of race, color, religion, sex, handicap, familial status, national origin, sexual orientation, or gender identity. Information about schools, distances, and amenities is provided as neutral factual data to help you research the property and is not a statement about who should or should not live here or the suitability of the home or neighborhood for any person or group. School data may change — confirm current assignments with the school district.
Found an error? If you are the owner, listing agent, or a party to this property and believe any information is inaccurate, email and we will review and correct or remove it promptly.
Automated content. Some summaries, distances, and estimates on this page are generated automatically from public and proprietary data sources and may contain errors or omissions. We strive for accuracy but cannot guarantee the completeness or accuracy of any information. Verify anything important independently.
No warranty; measurements & photos. No guarantee, warranty, or representation of any kind is made regarding the completeness or accuracy of any information, descriptions, or measurements on this page — including square-footage measurements and property condition — all of which should be independently verified through appropriate means, including in-person inspection and public records. Photographs may be virtually staged or digitally enhanced and may not reflect actual property conditions. Momentum Realty and its agents expressly disclaim any liability in connection with the information provided.
MLS / IDX. The data relating to real estate for sale on this web site comes in part from the Internet Data Exchange (IDX) program of the Florida Keys MLS, Inc. Internet Data Exchange. Real estate listings held by brokerage firms other than Momentum Realty are marked with the listing broker's name and include the name of the listing agent. Data provided is deemed reliable but is not guaranteed by the MLS to be accurate. The information being provided is for consumers' personal, non-commercial use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. Source: Florida Keys MLS, Inc.. © 2026 Florida Keys MLS, Inc. All rights reserved.
Listing data is deemed reliable but is not guaranteed and is subject to change or withdrawal without notice. Square footage and lot size are approximate. Real estate brokerage services provided by Momentum Realty, licensed in Florida and Georgia. © 2026 Move With Momentum LLC.