Michael Joseph Castro
Architect · Brereton Architects · Oakland
Public records
From the licensing board and the city of San Francisco.
The short answer
- Licensed?
- License activeArchitect C-24073First issued Mar 17, 1993, expires May 31, 2027.
Source: DCA license roster, retrieved Nov 5, 2026
- Any board discipline?
- None found.
We searched the California Architects Board enforcement list on Nov 5, 2026.
- Worked in San Francisco?
- 91 permits since 2006, 91 in the last 5 years. Latest filed Oct 29, 2026.
- What kind of projects?
- Commercial or tenant improvement 74 · Other 10 · Deck, stairs or patio cover 3
- How long do their permits take?
- Commercial or tenant improvement: 1 month. City typical for the same review: within 1 month.
Permits filed each year
San Francisco permits by the year they were filed. The last 5 years are in blue.
What are you planning?
Pick your kind of project to see their permits for it.
Commercial or tenant improvement: 74 permits in San Francisco
Time to get a permit
Median from filing to permit, from 65 issued permits filed since 1966; 6 still in review. City is the San Francisco median for the same kind of review, from 24,421 permits.
Where
- Financial District/South Beach52
- Chinatown9
- Mission5
- South of Market3
Most recent
- 345 Spear St1/f lobby ti: construction of non-load bearing partitions. modifications to (e) ceiling grid and tile. new office doors, frames, millwork and new finishes.Oct 29, 2026Filed
- 720 California St #0This project is limited to the slab infill of two communicating stairs between level 1+2 and level 3+4. work includes selective demolition of stairs, railing, and guards and new ceiling, light fixtures, and finishes.Oct 21, 2026Filed
- 425 Market StSte 900; demo of non-load bearing partitions, ceiling grid, lights, outlets, finishes, doors, frames and glazing. ab-017 applesSep 24, 2026Filed
- 425 Market StSuite 1600; conversion of a single tenant flr to multi-tenant including full tenant suite demolition, construction of new multi-tenant cooridor and restroom remodel. unit 1600Sep 15, 2026Filed
- 345 Spear St #0Ground and 2nd floor: demolition of existing tenant suite on the ground floor and selective demolition on the 2nd floor. no new plumbing fixtures.Sep 10, 2026Issued
| Filed | Project | Type | Status | Time to permit | Open |
|---|---|---|---|---|---|
| Oct 29, 2026 | 345 Spear St 1/f lobby ti: construction of non-load bearing partitions. modifications to (e) ceiling grid and tile. new office doors, frames, millwork and new finishes. Filed | Commercial or tenant improvement | Filed | — | |
| Oct 21, 2026 | 720 California St #0 This project is limited to the slab infill of two communicating stairs between level 1+2 and level 3+4. work includes selective demolition of stairs, railing, and guards and new ceiling, light fixtures, and finishes. Filed | Commercial or tenant improvement | Filed | — | |
| Sep 24, 2026 | 451 Pacific Av Exterior scope for this core + shell project. the sow is reflective of the approval certificate of apprioatenss and includes replacement of an existing non-historical glass storefront with glass doors in the courtyard, and replacment of an existing roof deck with guard rails and parcel, (2)access Filed | OtherType unconfirmed | Filed | — | |
| Sep 24, 2026 | 425 Market St Ste 900; demo of non-load bearing partitions, ceiling grid, lights, outlets, finishes, doors, frames and glazing. ab-017 apples Filed | Commercial or tenant improvement | Filed | — | |
| Sep 15, 2026 | 425 Market St Suite 1600; conversion of a single tenant flr to multi-tenant including full tenant suite demolition, construction of new multi-tenant cooridor and restroom remodel. unit 1600 Filed | Commercial or tenant improvement | Filed | — | |
| Sep 10, 2026 | 345 Spear St #0 Ground and 2nd floor: demolition of existing tenant suite on the ground floor and selective demolition on the 2nd floor. no new plumbing fixtures. Issued | Commercial or tenant improvement | Issued | Within 1 month | |
| Aug 31, 2026 | 2 Harrison St 5/f: selective demo and construction of non-load bearing partitions, (e) mods to ceiling grid & tile, light ficture relocatoi and new inlcuding reswitching, new doors & frames, millwork and finishes. Issued | Commercial or tenant improvement | Issued | Within 1 month | |
| Aug 6, 2026 | 333 Bush St #0 Suite 800: t.i. project includes selective demo and construction of non-load bearing partitions, new doors, storefronts, light fixtures, ceiling, millwork, and interior finishes. Filed | Commercial or tenant improvement | Filed | — | |
| Jul 14, 2026 | 425 Market St Tenanat improvement project involves demolition of non load bearing partitons, ceiling grid and tile, lights, electrical outlets, finishes, doors, frames, glazing. no remodediatin work included in scope. acm to be removed or encapsulated by landlord subcontractor prior to demolition. Filed | Commercial or tenant improvement | Filed | — | |
| May 26, 2026 | 2001 37th Av This restroom remodel project involves modification of 5 existing restrooms to include selective demolition and construction of restroom fixtures, accessories, toilet and unrinal partitions, counter tops, lighting and fixtures. Complete | Commercial or tenant improvement | Complete | Within 1 month | |
| May 21, 2026 | 188 The Embarcadero Removal of e and installation of new mechanical chiller, associated mech equip and modification to the raised grated steel platform and stairs. stuctural mech and electrical included. Issued | Other | Issued | Within 1 month | |
| May 18, 2026 | 451 Pacific Av Revision to core & shell pa# 202505126265: framing detail @ level 3 elevator penthouse, elevator shaft structural framing, structural strengthening at level 3 underside of north & south roof, modification to restroom at level 2 mezzanine, a switch from a prefabication metal stair to a pre-fab wood Issued | Revision or supplement | Issued | 4 months | |
| Feb 12, 2026 | 451 Pacific Av 3rd fl arch ti - new non-load bearing partitions, doors & door hardware, interior glazing, ceilings, light fixtures, millwork and associated finishes. mep under separate permit see pa 202505126265 for arch core/shell Issued | Commercial or tenant improvement | Issued | 5 months | |
| Jan 14, 2026 | 451 Pacific Av Revision 202505126265- to include the moment frame foundation are necessitated by field verified conditions of tghe (e) footing. (e) footing was found to be too shallow to accomadate the required dowels to resist design uplift forces Issued | Revision or supplement | Issued | Within 1 month | |
| Dec 19, 2025 | 451 Pacific Av Level 2 - 2m: scope of work includes construction of new non-load bearing partitions, doors and door + door hardware, interior glazing, ceilings, light fixtures, millwork, and associated finishes. mep under seperate permit. Issued | Commercial or tenant improvement | Issued | 1 month | |
| Nov 7, 2025 | 350 University St All work is at 1/f -project is limited to modifications to the north stair egress path & associated modifications to existing components along this path. scope includes slective demolition of non-load bearing partitions, new rated doors and frames, exit lighting, new exterior exit stair & associated Complete | Deck, stairs or patio coverType unconfirmed | Complete | 1 month | |
| Oct 3, 2025 | 451 Pacific Av 1st floor: interior office build-out of level 1 and level2 mezzanine (l1 +lm1). scope includes construction of new non-load bearing partitions, doors, and door hardware, interior glazing ceilings, light fixtures, millwork, and associated finishes. Issued | Commercial or tenant improvement | Issued | 3 months | |
| Aug 14, 2025 | 425 Market St 18th floor: modification and expansion of existing full floor office suite to include selective demolition and construction of non-load bearing partitions, existing modifications to ceiling grid & tile, light fixture relocation & new including re-switching, new office doors & frames, Complete | Commercial or tenant improvement | Complete | 1 month | |
| Jun 26, 2025 | 345 California St 17th fl- restroom upgrade-new partitions, millwork, finishes, add 2 floor drains, upgrade lighting fixtures. plumbing, electrical & fire life safety are deferred submittals Complete | Commercial or tenant improvement | Complete | Within 1 month | |
| Jun 6, 2025 | 451 Pacific Av Addition of new enclosed exit stair extending from level b to 2;(n) elevator erviing lvl 1,1m,2,2m,3.construction & assoc demo for the partial reframing of mezz.mod to steel bracing frams and seismic bracing.(n) partitions,elevator shaft, exit stair.new ada baths, lighting & finishes. Issued | Commercial or tenant improvementType unconfirmed | Issued | 6 months |
Sources: DataSF i98e-djp9, 3pee-9qhc, retrieved Nov 5, 2026. Names on permits are matched to licenses by license number and name; unmatched records are not shown.
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