# Building permits at 618 Blackstone Dr, Marin County, CA Four permits on record here. The newest, Sep 26, 2025: Permit, no description from the city. Within a quarter mile, the county has issued 4 more permits since May 1. ## At this address | Date | Type | Work | Cost | Permit | |---|---|---|---|---| | Sep 26, 2025 | Other | | $150,000 | [180176](https://nearbypermits.com/marin-county/permit/180176/) | | Jun 10, 2025 | Roofing | ReRoofing; With Electronic Inspection; | $29,988 | [B42708](https://nearbypermits.com/marin-county/permit/B42708/) | | Aug 31, 2023 | Mechanical (HVAC) | Mechanical Appliance, Replace Mechanical Appliance; | $34,000 | [B35257](https://nearbypermits.com/marin-county/permit/B35257/) | | Jul 9, 2020 | Roofing | ReRoofing; With Electronic Inspection; | $5,050 | [B22975](https://nearbypermits.com/marin-county/permit/B22975/) | ## Within ¼ mi since May 1, 2026 4 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 | |---|---|---|---|---|---|---| | Jun 4, 2026 | [626 Blackstone Dr](https://nearbypermits.com/marin-county/address/626-blackstone-dr/) | 170 ft W | Other | | $100,000 | [181820](https://nearbypermits.com/marin-county/permit/181820/) | ### Farther (1,000 ft to ¼ mi), 3 permits | Date | Address | Distance | Type | Work | Cost | Permit | |---|---|---|---|---|---|---| | Sep 28, 2026 | [5 Unionstone Ln](https://nearbypermits.com/marin-county/address/5-unionstone-ln/) | 0.22 mi E | Roofing | ReRoofing; | $40,000 | [B48513](https://nearbypermits.com/marin-county/permit/B48513/) | | Jun 18, 2026 | [3 Unionstone Ln](https://nearbypermits.com/marin-county/address/3-unionstone-ln/) | 0.22 mi E | Mechanical (HVAC) | Replace Mechanical Appliance; | $19,000 | [B47215](https://nearbypermits.com/marin-county/permit/B47215/) | | Jun 17, 2026 | [9 Valleystone Dr](https://nearbypermits.com/marin-county/address/9-valleystone-dr/) | 0.23 mi SE | Plumbing | Replace Plumbing Fixtures(s); | $17,000 | [B47202](https://nearbypermits.com/marin-county/permit/B47202/) | ## 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 Blackstone Dr with permits, nearest house number first: - [626 Blackstone Dr](https://nearbypermits.com/marin-county/address/626-blackstone-dr/): newest permit Jun 4, 2026 - [530 Blackstone Dr](https://nearbypermits.com/marin-county/address/530-blackstone-dr/): newest permit Jan 28, 2026 - [499 Blackstone Dr](https://nearbypermits.com/marin-county/address/499-blackstone-dr/): newest permit Nov 19, 2025 - [479 Blackstone Dr](https://nearbypermits.com/marin-county/address/479-blackstone-dr/): newest permit Oct 7, 2024 - [442 Blackstone Dr](https://nearbypermits.com/marin-county/address/442-blackstone-dr/): newest permit Dec 22, 2025 - [429 Blackstone Dr](https://nearbypermits.com/marin-county/address/429-blackstone-dr/): newest permit Apr 14, 2025 - [428 Blackstone Dr](https://nearbypermits.com/marin-county/address/428-blackstone-dr/): newest permit Apr 7, 2026 - [419 Blackstone Dr](https://nearbypermits.com/marin-county/address/419-blackstone-dr/): newest permit Jun 10, 2025 - [417 Blackstone Dr](https://nearbypermits.com/marin-county/address/417-blackstone-dr/): newest permit Feb 26, 2026 - [414 Blackstone Dr](https://nearbypermits.com/marin-county/address/414-blackstone-dr/): newest permit Jun 17, 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 2026-10-17 03:11 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 4 permits at this address and 4 nearby: https://nearbypermits.com/marin-county/address/618-blackstone-dr/