# Building permits at 21 Mt Lassen Dr, Marin County, CA Three permits on record here. The newest, May 19, 2025: Permit, no description from the city. Within a quarter mile, the county has issued 12 more permits since May 1. ## At this address | Date | Type | Work | Cost | Permit | |---|---|---|---|---| | May 19, 2025 | Other | | $58,260 | [179285](https://nearbypermits.com/marin-county/permit/179285/) | | Oct 6, 2021 | Electrical | Service Upgrade, EV Charging Station; | $7,544 | [B27319](https://nearbypermits.com/marin-county/permit/B27319/) | | Aug 15, 2017 | Other | | $12,000 | [156245](https://nearbypermits.com/marin-county/permit/156245/) | ## Within ¼ mi since May 1, 2026 12 permits in the circle. From our copy of the county's data (last 24 months). ### Next door (under 250 ft), 1 permits | Date | Address | Distance | Type | Work | Cost | Permit | |---|---|---|---|---|---|---| | Sep 8, 2026 | [6 Mt Darwin Ct](https://nearbypermits.com/marin-county/address/6-mt-darwin-ct/) | 220 ft S | Electrical | Service Upgrade; | $3,500 | [B48258](https://nearbypermits.com/marin-county/permit/B48258/) | ### This block (250 to 1,000 ft), 9 permits | Date | Address | Distance | Type | Work | Cost | Permit | |---|---|---|---|---|---|---| | Sep 18, 2026 | [5 Mt Palomar Ct](https://nearbypermits.com/marin-county/address/5-mt-palomar-ct/) | 830 ft W | Roofing | ReRoofing; | $18,315 | [B48395](https://nearbypermits.com/marin-county/permit/B48395/) | | Sep 3, 2026 | [130 Mt Lassen Dr](https://nearbypermits.com/marin-county/address/130-mt-lassen-dr/) | 890 ft NW | Alteration or repair | Siding Replacement; | $12,000 | [B48218](https://nearbypermits.com/marin-county/permit/B48218/) | | Sep 2, 2026 | [1126 Idylberry Rd](https://nearbypermits.com/marin-county/address/1126-idylberry-rd/) | 390 ft W | Plumbing | Replace Plumbing Fixtures(s); | $2,214 | [B48185](https://nearbypermits.com/marin-county/permit/B48185/) | | Aug 19, 2026 | [90 Mt Muir Ct](https://nearbypermits.com/marin-county/address/90-mt-muir-ct/) | 840 ft SW | Mechanical (HVAC) | New Ductwork, Mechanical Appliance; | $27,000 | [B47966](https://nearbypermits.com/marin-county/permit/B47966/) | | Jul 30, 2026 | [24 Mt Diablo Cir](https://nearbypermits.com/marin-county/address/24-mt-diablo-cir/) | 640 ft NW | Electrical | New Circuits / Outlets, Service Upgrade; | $20,000 | [B47682](https://nearbypermits.com/marin-county/permit/B47682/) | | Jun 9, 2026 | [1130 Idylberry Rd](https://nearbypermits.com/marin-county/address/1130-idylberry-rd/) | 460 ft W | Mechanical (HVAC) | Mechanical Appliance; | $11,500 | [B47085](https://nearbypermits.com/marin-county/permit/B47085/) | | Jun 1, 2026 | [86 Mt Muir Ct](https://nearbypermits.com/marin-county/address/86-mt-muir-ct/) | 840 ft SW | Alteration or repair | Stucco Replacement, Non-structural Door/Window Replacement; | $12,462 | [B46831](https://nearbypermits.com/marin-county/permit/B46831/) | | May 20, 2026 | [55 Mt Muir Ct](https://nearbypermits.com/marin-county/address/55-mt-muir-ct/) | 870 ft W | Other | | $100,000 | [B46850](https://nearbypermits.com/marin-county/permit/B46850/) | | May 18, 2026 | [86 Mt Muir Ct](https://nearbypermits.com/marin-county/address/86-mt-muir-ct/) | 840 ft SW | Alteration or repair | Non-structural Door/Window Replacement; | $12,462 | [B46834](https://nearbypermits.com/marin-county/permit/B46834/) | ### Farther (1,000 ft to ¼ mi), 2 permits | Date | Address | Distance | Type | Work | Cost | Permit | |---|---|---|---|---|---|---| | Jul 22, 2026 | [1160 Idylberry Rd](https://nearbypermits.com/marin-county/address/1160-idylberry-rd/) | 0.21 mi NW | Electrical | Service Upgrade; | $3,000 | [B47580](https://nearbypermits.com/marin-county/permit/B47580/) | | Jun 5, 2026 | [18 Jeannette Prandi Way](https://nearbypermits.com/marin-county/address/18-jeannette-prandi-way/) | 0.22 mi E | Mechanical (HVAC) | Replace Ductwork, Replace Mechanical Appliance; | $31,000 | [B46959](https://nearbypermits.com/marin-county/permit/B46959/) | ## Zoning requests nearby We don't list zoning cases for Marin County yet. Look them up on the county's Planning Commission page: https://www.marincounty.gov/departments/cda/planning/boards-commissions-and-public-hearings/about-planning-commission ## More on this street Other addresses on Mt Lassen Dr with permits, nearest house number first: - [22 Mt Lassen Dr](https://nearbypermits.com/marin-county/address/22-mt-lassen-dr/): newest permit Apr 3, 2025 - [25 Mt Lassen Dr](https://nearbypermits.com/marin-county/address/25-mt-lassen-dr/): newest permit Apr 16, 2026 - [50 Mt Lassen Dr](https://nearbypermits.com/marin-county/address/50-mt-lassen-dr/): newest permit Sep 5, 2025 - [80 Mt Lassen Dr](https://nearbypermits.com/marin-county/address/80-mt-lassen-dr/): newest permit Mar 19, 2025 - [90 Mt Lassen Dr](https://nearbypermits.com/marin-county/address/90-mt-lassen-dr/): newest permit Jan 8, 2026 - [100 Mt Lassen Dr](https://nearbypermits.com/marin-county/address/100-mt-lassen-dr/): newest permit Jun 26, 2025 - [110 Mt Lassen Dr](https://nearbypermits.com/marin-county/address/110-mt-lassen-dr/): newest permit Feb 23, 2026 - [115 Mt Lassen Dr](https://nearbypermits.com/marin-county/address/115-mt-lassen-dr/): newest permit Feb 11, 2025 - [125 Mt Lassen Dr](https://nearbypermits.com/marin-county/address/125-mt-lassen-dr/): newest permit Jul 21, 2025 - [130 Mt Lassen Dr](https://nearbypermits.com/marin-county/address/130-mt-lassen-dr/): newest permit Sep 3, 2026 --- Source: Marin County Community Development Agency permit data (https://data.marincounty.gov/d/mkbn-caye), County of Marin, CA, ODbL 1.0 (https://opendatacommons.org/licenses/odbl/1-0/). Checked 2026-10-12 12:15 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/ Contains information from Building Permit (County of Marin, CA), which is made available here under the Open Database License (ODbL). Database: https://data.marincounty.gov/d/mkbn-caye License: https://opendatacommons.org/licenses/odbl/1-0/ Map, all 3 permits at this address and 12 nearby: https://nearbypermits.com/marin-county/address/21-mt-lassen-dr/