Contractor Profile
Dennis Siems
Dennis Siems is a diversified San Diego contractor — 35 segment-eligible permits spanning 4 segments, led by commercial mep (51%) and commercial alteration (26%). Its permit record in San Diego spans 2015–2024. Reliable permit valuations total ≈$2.2M (across the 92% of filings with a valuation we can stand behind). Filing activity is up 200% over the last 90 days versus the prior 90 — a market heating up.
First permit: Feb 18, 2015 (4,212d ago)Latest permit: Oct 24, 2024 (676d ago)
The sales record
- Market
- San Diego
- Active
- 2015–2024 · 9 yrs
- Licence IDs on their permits
- —
- Reliable value
- $2.2M
- Coverage
- 92%
- Reliable filings
- 12
- Rank in San Diego
- #1,268
- Permits (all-time, all segments)
- 34
- Filings 90d
- 6
- Filings 30d
- 6
- Latest permit
- Oct 24, 2024
Typical project size$58Ktypically $12K–$222K across 12 valued permits
Where they work
Firmographics
License & registration IDs on fileNot in our data — we don’t hold licensing-board registries, and this city’s permit records carry no licence number. This is a gap in our coverage, not a statement about this firm’s licensure.
Direct contactNot in our data — we don’t fabricate firmographics.
Monthly activity
May ’260–6 permits/moAug ’26
permits per month permit value
Service area
Typical service area ~8 mi around San Diego
The p90 footprint of where Dennis Siems has pulled permits in San Diego — drawn from all 38 of their indexed permits. It reflects detected permit activity, not a guaranteed service-area claim.
- San Diego38
Showing 20 of 35 permits by Dennis Siems in the indexed window · most recent first
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- Aug 20, 2026Commercial Demolition3013 Science Park Rd, San Diego, Ca, San Diego, CADemolition · Commercial—applied Jun 17, 2026
- Aug 20, 2026Commercial Demolition3013 Science Park Rd, San Diego, Ca, San Diego, CADemolition · Commercial—applied Jun 17, 2026
- Aug 20, 2026Commercial Demolition3013 Science Park Rd, San Diego, Ca, San Diego, CADemolition · Commercial—applied Jun 17, 2026
- Aug 19, 2026Commercial Demolition3013 Science Park Rd, San Diego, Ca, San Diego, CADemolition · Commercial$13Kapplied Jun 17, 2026
- Aug 19, 2026Commercial Alteration3115 Merryfield Rw, San Diego, Ca, San Diego, CAAlteration$233Kapplied May 15, 2026
- Aug 17, 2026Commercial MEP3115 Merryfield Rw, San Diego, Ca, San Diego, CAElectrical · Commercial—applied May 15, 2026
- May 7, 2024Commercial MEP3033 Science Park Rd, San Diego, Ca, San Diego, CAElectrical · Commercial—applied Nov 6, 2023
- Apr 29, 2024Commercial MEP3550 John Hopkins Ct, San Diego, Ca, San Diego, CAPlumbing · Commercial—applied Feb 22, 2024
- Apr 29, 2024Commercial MEP3550 John Hopkins Ct, San Diego, Ca, San Diego, CAElectrical · Commercial—applied Feb 22, 2024
- Apr 29, 2024Commercial MEP3550 John Hopkins Ct, San Diego, Ca, San Diego, CAHVAC / Mechanical · Commercial—applied Feb 22, 2024
- Apr 29, 2024Commercial Alteration3550 John Hopkins Ct, San Diego, Ca, San Diego, CAAlteration$78Kapplied Feb 22, 2024
- Apr 16, 2024Commercial MEP3033 Science Park Rd, San Diego, Ca, San Diego, CAPlumbing · Commercial—applied Nov 6, 2023
- Apr 16, 2024Commercial MEP3033 Science Park Rd, San Diego, Ca, San Diego, CAHVAC / Mechanical · Commercial—applied Nov 6, 2023
- Apr 16, 2024Commercial Alteration3033 Science Park Rd, San Diego, Ca, San Diego, CAAlteration$219Kapplied Nov 6, 2023
- Mar 26, 2024Commercial MEP5375 Mira Sorrento Pl, San Diego, Ca, San Diego, CAPlumbing · Commercial—applied Dec 8, 2023
- Mar 26, 2024Commercial MEP5375 Mira Sorrento Pl, San Diego, Ca, San Diego, CAHVAC / Mechanical · Commercial—applied Dec 8, 2023
- Mar 26, 2024Commercial MEP5375 Mira Sorrento Pl, San Diego, Ca, San Diego, CAElectrical · Commercial—applied Dec 8, 2023
- Mar 26, 2024Commercial Alteration5375 Mira Sorrento Pl, San Diego, Ca, San Diego, CAAlteration$771Kapplied Dec 8, 2023
- Feb 21, 2024Commercial MEP5375 Mira Sorrento Pl, San Diego, Ca, San Diego, CAHVAC / Mechanical · Commercial—applied Dec 8, 2023
- Feb 21, 2024Commercial MEP5375 Mira Sorrento Pl, San Diego, Ca, San Diego, CAElectrical · Commercial—applied Dec 8, 2023
Aug 20, 2026 applied Jun 17, 2026 | 3013 Science Park Rd, San Diego, Ca, San Diego, CA | Commercial Demolition Commercial | — |
Aug 20, 2026 applied Jun 17, 2026 | 3013 Science Park Rd, San Diego, Ca, San Diego, CA | Commercial Demolition Commercial | — |
Aug 20, 2026 applied Jun 17, 2026 | 3013 Science Park Rd, San Diego, Ca, San Diego, CA | Commercial Demolition Commercial | — |
Aug 19, 2026 applied Jun 17, 2026 | 3013 Science Park Rd, San Diego, Ca, San Diego, CA | Commercial Demolition Commercial | $13K |
Aug 19, 2026 applied May 15, 2026 | 3115 Merryfield Rw, San Diego, Ca, San Diego, CA | Commercial Alteration | $233K |
Aug 17, 2026 applied May 15, 2026 | 3115 Merryfield Rw, San Diego, Ca, San Diego, CA | Commercial MEP Commercial | — |
May 7, 2024 applied Nov 6, 2023 | 3033 Science Park Rd, San Diego, Ca, San Diego, CA | Commercial MEP Commercial | — |
Apr 29, 2024 applied Feb 22, 2024 | 3550 John Hopkins Ct, San Diego, Ca, San Diego, CA | Commercial MEP Commercial | — |
Apr 29, 2024 applied Feb 22, 2024 | 3550 John Hopkins Ct, San Diego, Ca, San Diego, CA | Commercial MEP Commercial | — |
Apr 29, 2024 applied Feb 22, 2024 | 3550 John Hopkins Ct, San Diego, Ca, San Diego, CA | Commercial MEP Commercial | — |
Apr 29, 2024 applied Feb 22, 2024 | 3550 John Hopkins Ct, San Diego, Ca, San Diego, CA | Commercial Alteration | $78K |
Apr 16, 2024 applied Nov 6, 2023 | 3033 Science Park Rd, San Diego, Ca, San Diego, CA | Commercial MEP Commercial | — |
Apr 16, 2024 applied Nov 6, 2023 | 3033 Science Park Rd, San Diego, Ca, San Diego, CA | Commercial MEP Commercial | — |
Apr 16, 2024 applied Nov 6, 2023 | 3033 Science Park Rd, San Diego, Ca, San Diego, CA | Commercial Alteration | $219K |
Mar 26, 2024 applied Dec 8, 2023 | 5375 Mira Sorrento Pl, San Diego, Ca, San Diego, CA | Commercial MEP Commercial | — |
Mar 26, 2024 applied Dec 8, 2023 | 5375 Mira Sorrento Pl, San Diego, Ca, San Diego, CA | Commercial MEP Commercial | — |
Mar 26, 2024 applied Dec 8, 2023 | 5375 Mira Sorrento Pl, San Diego, Ca, San Diego, CA | Commercial MEP Commercial | — |
Mar 26, 2024 applied Dec 8, 2023 | 5375 Mira Sorrento Pl, San Diego, Ca, San Diego, CA | Commercial Alteration | $771K |
Feb 21, 2024 applied Dec 8, 2023 | 5375 Mira Sorrento Pl, San Diego, Ca, San Diego, CA | Commercial MEP Commercial | — |
Feb 21, 2024 applied Dec 8, 2023 | 5375 Mira Sorrento Pl, San Diego, Ca, San Diego, CA | Commercial MEP Commercial | — |
Sites Dennis Siems returns to6 in San Diego
Addresses where Dennis Siems has pulled repeat permits and the site itself has a deep permit history (25+ permits, all contractors). Each links to that parcel’s full record.
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- Rsmz Contractors, Mats Mattson391 commercial mep
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