# Building permits at 307 Blackstone Dr, Marin County, CA One permit on record here. The newest, Dec 18, 2024: Replace Mechanical Appliance. Within a quarter mile, the county has issued 30 more permits (29 projects) since May 1. ## At this address | Date | Type | Work | Cost | Permit | |---|---|---|---|---| | Dec 18, 2024 | Mechanical (HVAC) | Replace Mechanical Appliance; | $7,000 | [B40586](https://nearbypermits.com/marin-county/permit/B40586/) | ## Within ¼ mi since May 1, 2026 30 permits in the circle. From our copy of the county's data (last 24 months). ### Next door (under 250 ft), 2 permits | Date | Address | Distance | Type | Work | Cost | Permit | |---|---|---|---|---|---|---| | Jul 16, 2026 | [316 Blackstone Dr](https://nearbypermits.com/marin-county/address/316-blackstone-dr/) | 190 ft N | Alteration or repair | Non-structural Door/Window Replacement; | $4,460 | [B47506](https://nearbypermits.com/marin-county/permit/B47506/) | | May 6, 2026 | [316 Blackstone Dr](https://nearbypermits.com/marin-county/address/316-blackstone-dr/) | 190 ft N | Plumbing | Replace Plumbing Fixtures(s); | $3,000 | [B46685](https://nearbypermits.com/marin-county/permit/B46685/) | ### This block (250 to 1,000 ft), 15 permits | Date | Address | Distance | Type | Work | Cost | Permit | |---|---|---|---|---|---|---| | Oct 2, 2026 | [269 Flagstone Ter](https://nearbypermits.com/marin-county/address/269-flagstone-ter/) | 990 ft S | Alteration or repair | Non-structural Door/Window Replacement; | $6,690 | [B48611](https://nearbypermits.com/marin-county/permit/B48611/) | | Sep 22, 2026 | [254 Blackstone Dr](https://nearbypermits.com/marin-county/address/254-blackstone-dr/) | 730 ft E | Roofing | ReRoofing; | $24,200 | [B48441](https://nearbypermits.com/marin-county/permit/B48441/) | | Sep 16, 2026 | [266 Blackstone Dr](https://nearbypermits.com/marin-county/address/266-blackstone-dr/) | 610 ft E | Electrical | Service Upgrade; | $8,050 | [B48342](https://nearbypermits.com/marin-county/permit/B48342/) | | Sep 2, 2026 | [3 Sandstone Ct](https://nearbypermits.com/marin-county/address/3-sandstone-ct/) | 650 ft NW | Other | | $188,536 | [182490](https://nearbypermits.com/marin-county/permit/182490/) | | Aug 26, 2026 | [385 Johnstone Dr](https://nearbypermits.com/marin-county/address/385-johnstone-dr/) | 590 ft N | Plumbing | Replace Plumbing Fixtures(s); | $9,280 | [B48078](https://nearbypermits.com/marin-county/permit/B48078/) | | Aug 23, 2026 | [386 Johnstone Dr](https://nearbypermits.com/marin-county/address/386-johnstone-dr/) | 570 ft N | Other | | $49,000 | [B48027](https://nearbypermits.com/marin-county/permit/B48027/) | | Aug 18, 2026 | [345 Ironstone Ct](https://nearbypermits.com/marin-county/address/345-ironstone-ct/) | 320 ft NW | Electrical | Service Upgrade, EV Charging Station; | $6,886 | [B47957](https://nearbypermits.com/marin-county/permit/B47957/) | | Aug 11, 2026 | [59 Windstone Dr](https://nearbypermits.com/marin-county/address/59-windstone-dr/) | 970 ft S | Roofing | ReRoofing; With Electronic Inspection; | $8,500 | [B47853](https://nearbypermits.com/marin-county/permit/B47853/) | | Jul 27, 2026 | [10 Sandstone Ct](https://nearbypermits.com/marin-county/address/10-sandstone-ct/) | 730 ft NW | Electrical | Service Upgrade; | $4,500 | [B47634](https://nearbypermits.com/marin-county/permit/B47634/) | | Jul 8, 2026 | [272 Blackstone Dr](https://nearbypermits.com/marin-county/address/272-blackstone-dr/) | 540 ft E | Mechanical (HVAC) | Mechanical Appliance; | $1,535 | [B47437](https://nearbypermits.com/marin-county/permit/B47437/) | | Jul 6, 2026 | [48 Millstone Ter](https://nearbypermits.com/marin-county/address/48-millstone-ter/) | 980 ft N | Mechanical (HVAC) | Replace Mechanical Appliance; | $20,000 | [B47394](https://nearbypermits.com/marin-county/permit/B47394/) | | Jun 24, 2026 | [2749 Heatherstone Dr](https://nearbypermits.com/marin-county/address/2749-heatherstone-dr/) | 730 ft NE | Other | | $44,361 | [B47272](https://nearbypermits.com/marin-county/permit/B47272/) | | Jun 10, 2026 | [355 Ironstone Ct](https://nearbypermits.com/marin-county/address/355-ironstone-ct/) | 360 ft NW | Plumbing | Replace Plumbing Fixtures(s); | $20,610 | [B47090](https://nearbypermits.com/marin-county/permit/B47090/) | | May 29, 2026 | [345 Ironstone Ct](https://nearbypermits.com/marin-county/address/345-ironstone-ct/) | 320 ft NW | Electrical | Service Upgrade, EV Charging Station; | $4,800 | [B46962](https://nearbypermits.com/marin-county/permit/B46962/) | | May 5, 2026 | [59 Windstone Dr](https://nearbypermits.com/marin-county/address/59-windstone-dr/) | 970 ft S | Mechanical (HVAC) | Replace Mechanical Appliance; | $9,000 | [B46681](https://nearbypermits.com/marin-county/permit/B46681/) | ### Farther (1,000 ft to ¼ mi), 13 permits | Date | Address | Distance | Type | Work | Cost | Permit | |---|---|---|---|---|---|---| | Oct 2, 2026 | [2797 Las Gallinas Ave](https://nearbypermits.com/marin-county/address/2797-las-gallinas-ave/) | 0.21 mi NW | Electrical | New Circuits / Outlets, Service Upgrade; | $9,823 | [B48627](https://nearbypermits.com/marin-county/permit/B48627/) | | Sep 29, 2026 | [250 Emerystone Ter](https://nearbypermits.com/marin-county/address/250-emerystone-ter/) | 0.23 mi S | Other | | $23,860 | [B48530](https://nearbypermits.com/marin-county/permit/B48530/) | | Sep 23, 2026 | [2661 Las Gallinas Ave](https://nearbypermits.com/marin-county/address/2661-las-gallinas-ave/) | 0.20 mi W | Plumbing | Replace Plumbing Fixtures(s); | $3,200 | [B48461](https://nearbypermits.com/marin-county/permit/B48461/) | | Sep 14, 2026 | [274 Emerystone Ter (A D U 274a)](https://nearbypermits.com/marin-county/address/274-emerystone-ter-(a-d-u-274a)/) | 0.24 mi S | Other | | $165,000 | [182550](https://nearbypermits.com/marin-county/permit/182550/) | | Aug 25, 2026 | [15 Unionstone Dr](https://nearbypermits.com/marin-county/address/15-unionstone-dr/) | 0.23 mi W | Mechanical (HVAC) | Replace Mechanical Appliance; | $8,617 | [B48059](https://nearbypermits.com/marin-county/permit/B48059/) | | Jul 30, 2026 | [280 Emerystone Ter](https://nearbypermits.com/marin-county/address/280-emerystone-ter/) | 0.24 mi S | Plumbing | New Plumbing Fixture(s); | $1,450 | [B47695](https://nearbypermits.com/marin-county/permit/B47695/) | | Jul 30, 2026 | [219 Adobestone Ct](https://nearbypermits.com/marin-county/address/219-adobestone-ct/) | 0.24 mi E | Other | | $19,405 | [B47684](https://nearbypermits.com/marin-county/permit/B47684/) | | Jul 16, 2026 | [275 Johnstone Dr](https://nearbypermits.com/marin-county/address/275-johnstone-dr/) | 0.23 mi NE | Other | | $98,000 | [182126](https://nearbypermits.com/marin-county/permit/182126/) | | Jun 10, 2026 | [2826 Las Gallinas Ave](https://nearbypermits.com/marin-county/address/2826-las-gallinas-ave/) | 0.20 mi NW | Other | | $60,000 | [B47098](https://nearbypermits.com/marin-county/permit/B47098/) | | Jun 3, 2026 | [241 Emerystone Ter](https://nearbypermits.com/marin-county/address/241-emerystone-ter/) | 0.23 mi SE | Other | | $50,400 | [B47016](https://nearbypermits.com/marin-county/permit/B47016/) | | May 17, 2026 | [241 Emerystone Ter](https://nearbypermits.com/marin-county/address/241-emerystone-ter/) | 0.23 mi SE | Other | | $6,000 | [B46823](https://nearbypermits.com/marin-county/permit/B46823/) | | Jun 1, 2026 | [163 Deepstone Dr](https://nearbypermits.com/marin-county/address/163-deepstone-dr/) | 0.21 mi SE | Roofing | ReRoofing; | $5,000 | [B46975](https://nearbypermits.com/marin-county/permit/B46975/) | | May 21, 2026 | [241 Emerystone Ter](https://nearbypermits.com/marin-county/address/241-emerystone-ter/) | 0.23 mi SE | Roofing | ReRoofing; | $18,534 | [B46879](https://nearbypermits.com/marin-county/permit/B46879/) | ## 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: - [316 Blackstone Dr](https://nearbypermits.com/marin-county/address/316-blackstone-dr/): newest permit Jul 16, 2026 - [287 Blackstone Dr](https://nearbypermits.com/marin-county/address/287-blackstone-dr/): newest permit Sep 5, 2025 - [284 Blackstone Dr](https://nearbypermits.com/marin-county/address/284-blackstone-dr/): newest permit May 14, 2025 - [275 Blackstone Dr](https://nearbypermits.com/marin-county/address/275-blackstone-dr/): newest permit Feb 3, 2026 - [272 Blackstone Dr](https://nearbypermits.com/marin-county/address/272-blackstone-dr/): newest permit Jul 8, 2026 - [266 Blackstone Dr](https://nearbypermits.com/marin-county/address/266-blackstone-dr/): newest permit Sep 16, 2026 - [358 Blackstone Dr](https://nearbypermits.com/marin-county/address/358-blackstone-dr/): newest permit Dec 8, 2025 - [254 Blackstone Dr](https://nearbypermits.com/marin-county/address/254-blackstone-dr/): newest permit Sep 22, 2026 - [243 Blackstone Dr](https://nearbypermits.com/marin-county/address/243-blackstone-dr/): newest permit Aug 14, 2025 - [230 Blackstone Dr](https://nearbypermits.com/marin-county/address/230-blackstone-dr/): newest permit Jan 5, 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 2026-10-14 08:56 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, the one permit at this address and 30 nearby: https://nearbypermits.com/marin-county/address/307-blackstone-dr/