6209 NW 18 AVE
Office building — one story · Unincorporated County · 33147
At a glance
6209 NW 18 AVE in Unincorporated County, FL is listed on the Miami-Dade County property roll as “Office building — one story”, folio 3031150053160. The roll records 1,520 sq ft of building area, 1 floors, a 1925 build year and an assessed value of $159,986 (2026 roll). It last sold for $1,000,000 in Feb 2026 on a deed covering 2 parcels. 5 active business locations at this address appear in public records.
Permits and tenant turnover — what runs ahead of a listing
Recent activity
| Issued | Suite | Work | Cost | Status | Contractor |
|---|---|---|---|---|---|
| Jan 2026 | — | ELECTRICAL | — | F | ALL QUALITY ELECTRICAL SERVICES INC |
Permits come from Miami-Dade County, with job cost and square footage added from the City of Miami's file where the building sits in the city. Arrivals and departures are business-tax receipts opened and closed at this address. None of this is an availability listing. A permit means work was authorised, not that space is for rent, and a closed receipt can mean a business moved, renamed or simply stopped renewing. It is the record that runs ahead of a listing, which is the only part of "what is coming available" that is public at all.
Recorded transfers — county roll + state sale file
Sale history
The most recent transfer covered 2 parcels. The price shown is the whole transaction, not this parcel alone, so any per-square-foot figure is measured across everything the deed conveyed. The state sale file flags it as a multi-parcel transfer.
| Recorded | Price | Qualification | Source | Instrument |
|---|---|---|---|---|
| Feb 2026 | $1,000,000 | not rated | County roll | — |
| Feb 2026 (month) | $1,000,000 | Arm's length, multiple parcels | State sale file | Book 35194 / 871 |
Prices are the consideration the documentary stamps indicate, as recorded by Miami-Dade County. A qualification code is the property appraiser's judgement of whether a transfer was arm's length; the state publishes it only for the current roll period, so older transfers appear unrated rather than assumed clean. Whether a building is on the market today, and at what price, is not a public record and is not shown here — asking prices, listings and lease terms live in private commercial databases.
Public record — 6 matched business locations
Tenants & business locations
| Company | Suite / floor | Since | Source | Match |
|---|---|---|---|---|
| DOCTORS UNITED GROUP INC | — | Feb 2026 | County business tax | folio match · high |
| Individual (name withheld) | — | Feb 2026 | County business tax | address match · high |
| SONIC COMMUNICATIONS, INC. | — | Oct 2023 | County business tax | folio match · high |
| DOCTORS UNITED GROUP INC | — | Jul 2025 | Certificate of use | folio match · high |
Registered entities at this address (1) — Florida corporate registry
Active Florida entities whose registered principal address is this building. A registration is evidence of presence, not a verified lease — many are holding companies or entities administered from a tenant's suite.
| Entity | Suite / floor | Filed | Match |
|---|---|---|---|
| DOCTOR UNITED GROUP, INC. | — | Sep 2018 | address match · high |
Former / closed records (1)
| Company | Suite | Since | Source |
|---|---|---|---|
| BIG JIM'S GYM LLC | — | Apr 2021 | County business tax |
Miami-Dade County assessment roll 2026
Parcel record
| Field | Value |
|---|---|
| folio | 3031150053160 |
| Site address | 6209 NW 18 AVE |
| Land use (DOR) | 1713 — Office building — one story |
| Building area (actual) | 1,520 sq ft |
| Building area (gross) | 1,520 sq ft |
| Floors / units / buildings | 1 / — / 1 |
| Lot size | 2,800 sq ft |
| Year built | 1925 |
| Zoning (primary) | 6400 |
| Land value | $63,000 |
| Building value | $96,986 |
| Total assessed value | $159,986 |
Recorded owner (assessment roll)
DOCTOR UNITED GROUP INC
Owner mailing address: 714 NW 62 ST, MIAMI, FL, 33150
The owner is on site. A business-tax receipt at this address is held in the owner's own name, so the public record shows an owner-occupier rather than a landlord letting the space.
Location
- Address
- 6209 NW 18 AVE
- City
- Unincorporated County
- ZIP
- 33147
- Coordinates
- 25.83195, -80.22673
Within ~650 m
Nearby office buildings
- 5861 NW 17 AVE4 tenants
3,100 sq ft · 1 fl · 1950
- 6609 NW 18 AVE0 tenants
1,225 sq ft · 1 fl · 1981
- 5800 NW 17 AVE0 tenants
1,120 sq ft · 1 fl · 1955
- 6500 NW 15 AVE1 tenants
1,115 sq ft · 1 fl · 1941
- 6925 NW 18 AVE3 tenants
950 sq ft · 1 fl · 1940
- 6917 NW 18 AVE9 tenants
800 sq ft · 1 fl · 1939
How does 6209 NW 18 AVE compare with other Miami office buildings?
At 1,520 sq ft, 6209 NW 18 AVE is less than a tenth the size of the average office building on the Miami-Dade County roll, which comes to 29,215 sq ft across 4,288 buildings.
Its assessed value works out to $105 per square foot of building area, against $203 across all office floor area on the roll.
Does the owner of 6209 NW 18 AVE hold other Miami office property?
DOCTOR UNITED GROUP INC also holds a business-tax receipt at this address, so the public record shows an owner-occupier rather than a landlord letting the space.
What has happened at 6209 NW 18 AVE recently?
2 recorded transfers are on file for this parcel, the latest dated Feb 2026.
1 building permit on record, 1 issued in the last 24 months.
In the last 12 months 2 businesses opened a receipt here and 1 closed one.
What does “OFFICE BUILDING - ONE STORY : OFFICE BUILDING” mean for this parcel?
The Miami-Dade County roll classifies folio 3031150053160 as “OFFICE BUILDING - ONE STORY : OFFICE BUILDING” (use code 1713). BuildingCensus includes a parcel in its office census when the roll gives it an office-class use, so the label is the county's, not an inference.
Its primary zoning on the roll is 6400.
Frequently asked questions
Who owns 6209 NW 18 AVE?
The recorded owner on the Miami-Dade County assessment roll (2026) is DOCTOR UNITED GROUP INC. Owner mailing address on file: 714 NW 62 ST, MIAMI, FL, 33150.
What companies have offices at 6209 NW 18 AVE?
5 active business locations at this building appear in Miami-Dade County public records, including DOCTORS UNITED GROUP INC, SONIC COMMUNICATIONS, INC., DOCTORS UNITED GROUP INC, DOCTOR UNITED GROUP, INC.. Public records under-count tenants that don't hold a local receipt or register the address.
How big is 6209 NW 18 AVE?
The Miami-Dade County roll records 1,520 sq ft of building area, 1 floors, a build year of 1925. It sits on a 2,800 sq ft lot.
What is the assessed value of 6209 NW 18 AVE?
$159,986 on the 2026 Miami-Dade County roll — $63,000 land and $96,986 building. Assessed values are taxable-roll figures, not market prices.
When did 6209 NW 18 AVE last sell?
The last recorded transfer was in Feb 2026 for $1,000,000, on one deed conveying 2 parcels.
What is the folio for 6209 NW 18 AVE?
Folio 3031150053160, site address 6209 NW 18 AVE, Unincorporated County. It is the key to look the parcel up in the Miami-Dade County Property Appraiser — assessment roll.
More around 6209 NW 18 AVE
Everything here comes from public records, and public records go stale. If you know better, say so.
Data provenance — public records only
- Miami-Dade County Property Appraiser — assessment roll — Parcel identity, site address, recorded owner, use code, areas, year built and assessed values, via the county's public GIS services (MD_LandInformation, PaGis layer).
- Miami-Dade County Local Business Tax roll — Business-tax receipts: business name, premises address (incl. suite/floor), account status and start date, via the county's public GIS services.
- Florida Division of Corporations (Sunbiz) — corporate data file — Registered entities: document number, status, filing date, registered agent and principal address, from the state's public quarterly data file.
- Miami-Dade County Property Appraiser — recorded sale — The last recorded transfer price and date for the parcel, from the county's public property point view.
- Florida Department of Revenue — Sale Data File — Every transfer in the current roll period with the property appraiser's sale qualification code, vacant/improved code, multi-parcel flag and the clerk's recording reference.
- Miami-Dade County building permits, and City of Miami permits since 2014 — Issued permits on the parcel: scope of work, suite where recorded, contractor, status and completion date, plus job cost and square footage from the city's file.
- Miami-Dade County certificates of use — Certificates authorising a business to occupy a space: the date it was issued, the corporate and trading names, the county's business-use label, the suite, and the officers named on the application.
Every fact on this page is drawn from the government records above — no listing sites, no scraped platforms, no third-party images. Facts from public records are uncopyrightable; each tenancy row carries its source and match confidence. Records can lag reality — a business-tax receipt or registration at an address is evidence of occupancy, not a lease confirmation.
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Dataset updated . Source: Miami-Dade County assessment roll, folio 3031150053160.
About this data
Source: Miami-Dade County Property Appraiser — assessment roll, as published October 8, 2026. See the methodology for how records are matched, cleaned and scored.
Cite as: BuildingCensus, “6209 NW 18 AVE, Unincorporated County, FL (folio 3031150053160)”, https://buildingcensus.com/offices/miami/office-building-7eb8254d (data as of October 8, 2026).