Add-Ons, PE Stamps & Engineering Coordination

Add-On Services

Bounded support layered on plan-set work, or quoted standalone. Permit and interconnection support, structural and electrical PE stamps, code consulting. Published pricing where it can be standardized; per-project quotes where it can't.

Residential Permitting + IX Commercial Permitting + IX Residential PE Stamps Commercial PE Stamps Consulting Project Management

Residential Permitting + Interconnection

Per-project flat rates for the permit and interconnection work that follows a plan-set delivery.

Service
Price
AHJ Permit Submittal
$100
Interconnection (IX) Application
$150
Coordination of Final Inspection
$50
PTO Request Submission
$50
Expedited Permit Filing
+$200
Expedited IX Filing
+$200
Additional AHJ / Utility Follow-Ups
$50
Revisions and Resubmissions (post-first-revision)
$100
Unpermitted System Consulting
$250

Commercial Permitting + Interconnection

Tiered by system size. Same scope; complexity scales with project size.

Service
50–250 kW
250–500 kW
500 kW – 1 MW
AHJ Research and Compliance Check
$400
$600
$900
Permit Filing
$300
$450
$650
Level 2 IX Application + Utility Coordination
$600
$900
$1,400
Utility Pre-Application Report (if required)
$400
$500
$650
Coordination of Final Inspection
$400
$550
$750
PTO Request Submission
$400
$550
$750
Additional AHJ / Utility Follow-Ups
$150
$200
$300
Revisions and Resubmissions
$250
$400
$600

Professional Engineer (PE) Stamps — Residential (≤50 kW DC)

Standard stamps at flat rate. Custom AHJs and non-standard structural conditions priced separately.

Stamp Type
Price
Structural PE Stamp (Standard)
$145
Electrical PE Stamp (Standard)
$145
Combined Structural + Electrical (Standard)
$245
Structural PE Stamp (Certified Ground Mount)
$295
Structural PE Stamp (Custom Ground Mount)
$450
Structural PE Stamp (Tilt-Up System)
$275
Structural PE Stamp (Mobile Home — 2x2 framing)
$275
Structural PE Stamp (Custom AHJ*)
$425
Bus Cert Letter (MPU Avoidance)
$385
SOR — Post-Install Letter
$175
Wet Stamp
$175
Re-Stamps
50% of original
Load Calculations (Electrical)
$175
Fault Studies
$375
Pre-Design / Engineering (Structural Check)
$115

* Custom AHJ = Miami-Dade, Prince William County, City of Chicago, City of Orange, City of Portland, and any AHJ requiring RISA or custom engineering analysis.

Professional Engineer (PE) Stamps — Commercial / C&I

Tiered by system size. Custom or non-standard scope quoted per-project.

Stamp
50–250 kW
250–500 kW
500 kW – 1 MW
Structural PE Stamp + Letter
$500
$850
$1,400
Electrical PE Stamp
$400
$650
$1,100
Re-Stamps
50% of original
50% of original
50% of original

Engineer cost variability above flat rates passes through at engineer cost + 15% project management markup.

On-Demand & Consulting

Request quote. Standalone consulting availability is limited.

  • Code consulting — NEC, IRC interpretation and application to specific designs or AHJ correction loops
  • Complex AHJ resolution — escalated AHJ correction loops, jurisdiction-specific resolution work
  • VPP-readiness review — for existing systems or fleets evaluating program enrollment
  • TPO system design support — for sales orgs and finance providers (Sunrun, Sunnova, Tesla, GoodLeap-financed structures)
  • Custom engineering coordination — beyond the standard PE stamp scope

Project Management (Optional)

Hourly

$150/hr

Time-and-materials project management for complex multi-stakeholder projects.

Flat Project Fee

8% of total fees

8% of total HPHS service fees, capped at $5,000 per project. Predictable for budget planning.

Need a quote on add-on scope?

Send the project details and the add-ons you need. We'll return a clear scope and total.

Request Quote