Baltimore City · 21224
3400 MERTENS AVE
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- Total assessment
- $1,181,367
- Land use
- Commercial (C)
- Year built
- 1956
- Last sale
- Jul 30, 2025
Assessment
| Owner | STATE OF MARYLAND |
|---|---|
| Land use | Commercial (C) |
| Total assessment | $1,181,367 (cycle 2026) |
| Last sale | Jul 30, 2025 |
| Year built | 1956 |
| Zoning | MI |
| Vacant | — |
Permits
9| Type | Description | Cost | Issued |
|---|---|---|---|
| BCCM | Verizon Wireless proposes to remove 6 antennas, 6 remote radio heads and install 9 antennas and 6 remote radio heads on existing telecommunication rooftop. Upgrade ancillary equipment as per plans. | $47,000 | Jun 15, 2026 |
| BCCM | SCOPE OF WORK: --------- EXTERIOR ALTERATIONS ----- Verizon Wireless proposes to remove 6 antenna and 6 RRH's, install 12 antenna and 6 RRH's on an existing Telcommunication rooftop and upgrade ancillary equipment. AS PER PLANS AND AS PER CODE. | $35,000 | Sep 12, 2025 |
| COM2022 | RELOCATE (9) ANTENNAS AND (6) RRHS ON EXISTING ROOFTOP AS PER PLANS AS PER CODE. IF INSTALLING SUPPRESSION SYSTEM IN EQUIPMENT CABINET, THEN SEPARATE PERMIT IS REQUIRED. | $30,000 | Aug 2, 2022 |
| COM2021 | AMEND PERMIT COM2020-01502 PLAN NO 2020-1161 ISSUED 6/10/20 FOR REMOVING (15) PANEL ANTENNAS, (5) FROM EACH SECTOR, AND INSTALLING (9) NEW PROPOSED ANTENNAS, (3) AT EACH SECTOR. ALSO REMOVING (6) REMOTE RADIO HEADS, (2) FROM EACH SECTOR, AND INSTALLING (6) NEW REMOTE RADIO HEADS, (2) AT EACH SECTOR, AS PER PLANS AS PER CODE. IF INSTALLING SUPPRESSION SYSTEM IN EQUIPMENT CABINET, THEN SEPARATE PERMIT IS REQUIRED. | $25,000 | Jan 7, 2022 |
| COM2021 | AMEND PERMIT: ADD ELECTRICAL CONTRACTOR . EXTEND ORIGINAL PERMIT.(ORIGINAL PERMIT:COM2021-00872:SCOPE OF WORK:---EXTERIOR ALTERATIONS---INSTALL (9) NEW ANTENNAS RELOCATE (9) EXISTING ANTENNAS AND (15) EXISTING REMOTE RADIO HEADS AS PER PLANS AS PER CODE.) Original Permit Description:(COM2021-00872) SCOPE OF WORK:---EXTERIOR ALTERATIONS---INSTALL (9) NEW ANTENNAS RELOCATE (9) EXISTING ANTENNAS AND (15) EXISTING REMOTE RADIO HEADS AS PER PLANS AS PER CODE. | — | Oct 14, 2021 |
| COM2021 | REINSTATE ORIGINAL PERMIT.(ORIGINAL PERMIT:COM2020-02064:REMOVE (3) EXISTING ANTENNAS AND (3) EXISTING RRHS AND INSTALL (3) NEW ANTENNAS AND (6) NEW RRHS AS PER PLANS AS PER CODE. IF INSTALLING SUPPRESSION SYSTEM IN EQUIPMENT CABINET, THEN SEPARATE PERMIT IS REQUIRED. ) Original Permit Description:(COM2020-02064) REMOVE (3) EXISTING ANTENNAS AND (3) EXISTING RRHS AND INSTALL (3) NEW ANTENNAS AND (6) NEW RRHS AS PER PLANS AS PER CODE. IF INSTALLING SUPPRESSION SYSTEM IN EQUIPMENT CABINET, THEN SEPARATE PERMIT IS REQUIRED. | — | Oct 6, 2021 |
| COM2021 | SCOPE OF WORK:---EXTERIOR ALTERATIONS---INSTALL (9) NEW ANTENNAS RELOCATE (9) EXISTING ANTENNAS AND (15) EXISTING REMOTE RADIO HEADS AS PER PLANS AS PER CODE. | $15,000 | May 24, 2021 |
| COM2020 | REMOVE (3) EXISTING ANTENNAS AND (3) EXISTING RRHS AND INSTALL (3) NEW ANTENNAS AND (6) NEW RRHS AS PER PLANS AS PER CODE. IF INSTALLING SUPPRESSION SYSTEM IN EQUIPMENT CABINET, THEN SEPARATE PERMIT IS REQUIRED. | $25,000 | Sep 29, 2020 |
| COM2020 | REMOVING (15) PANEL ANTENNAS, (5) FROM EACH SECTOR, AND INSTALLING (9) NEW PROPOSED ANTENNAS, (3) AT EACH SECTOR. ALSO REMOVING (6) REMOTE RADIO HEADS, (2) FROM EACH SECTOR, AND INSTALLING (6) NEW REMOTE RADIO HEADS, (2) AT EACH SECTOR AS PER PLANS AS PER CODE. IF INSTALLING SUPPRESSION SYSTEM IN EQUIPMENT CABINET, THEN SEPARATE PERMIT IS REQUIRED. | $25,000 | Jun 10, 2020 |
Violations
0No violations on record.
Inspections
0No inspections on record.
Records marked with * are matched by address, not a direct account link. Data is informational only.
Data freshness: city-311: 2026-07-12; city-ecb-citations: 2026-07-12; city-housing-inspections: 2026-07-12; city-permits: 2026-07-12; city-real-property: 2026-07-12; city-vbn: 2026-07-12; county-permits: 2026-07-12; sdat-properties: 2026-07-12;
Official sources: Maryland SDAT, Baltimore City permits.