Contractor Profile

J & M KEYSTONE INC

J & M KEYSTONE INC is a diversified San Diego contractor — 70 segment-eligible permits spanning 4 segments, led by residential mep (40%) and commercial mep (30%). Its permit record in San Diego spans 2019–2025.

First permit: Jan 25, 2019 (2,716d ago)Latest permit: May 21, 2025 (408d ago)
The sales record
Territory
San Diego
Active
2019–2025 · 6 yrs
Licenses on file
0
Canonical ID
554,477
Reliable value
—
Coverage
—
Reliable filings
—
Rank in San Diego
#128
Permits (all-time)
233
Filings 90d
0
Filings 30d
0
Latest permit
May 21, 2025
Typical project sizeNot enough valued permits to summarize.
Where they work
Ranked #110 in the San Diego Residential MEP leaderboard →
Firmographics
License & registration IDs on fileNo license records in the source data.
Direct contactNot in our data — we don’t fabricate firmographics.
What we won’t fabricate

J & M KEYSTONE INC has 233 permits, but too few carry a value we can stand behind — so we publish — for reliable value, never a guess. They still rank by volume; the dollar figure stays honest.

—Valuation coverage too low to total
Service area

Typical service area ~8 mi around San Diego

The p90 footprint of where J & M KEYSTONE INC has pulled permits in San Diego — based on 233 geocoded permits (100% of their indexed set). It reflects detected permit activity, not a guaranteed service-area claim.

  • San Diego233
Recent permits

No recent permits indexed

No permits for J & M KEYSTONE INC are indexed yet. This updates automatically as the pipeline ingests new filings. Explore segment breakdowns by metro:

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