How do you initiate an engineering audit inquiry?
Connect directly with our Charlotte engineering office. We provide clear fee quotes for commercial real estate audits, mechanical efficiency reviews, and building envelope diagnostics across North Carolina.
Where is our physical engineering office located?
Our practice operates from 1210 North Tryon Street, Charlotte, North Carolina 28206.
Property managers, facility engineers, and building owners are welcome by appointment. Whether you need an initial utility bill reconciliation or want to deliver architectural mechanical drawings in person, our office provides a direct line to practicing energy auditors.
Charlotte, North Carolina 28206
United States
Monday – Friday: 8:00 AM – 5:00 PM EST
Monitored during standard business hours
- Walkthrough Audit $1,000–$2,000
- Detailed Level II $5,000–$15,000
- Area-Based Scope $0.05–$0.50 / sq ft
Direct Facility Intake Form
Submit your property details to request an audit scope and fee estimate. We reply with preliminary pricing and scheduling availability within two business days.
What information is needed to schedule an audit?
To prepare an accurate engineering quote, we require twelve to twenty-four months of consecutive utility bills, facility gross square footage, and mechanical equipment schedules.
Before deploying engineers or data loggers to a facility, our preliminary review determines whether a baseline walkthrough or a full investment-grade audit is the appropriate intervention. If your facility possesses digital interval data from Duke Energy or Piedmont Natural Gas, we evaluate hourly load profiles prior to our first on-site walkthrough.
The four baseline documentation items that accelerate quote generation:
- Utility Consumption History 12–24 months of electric (kWh and kW peak) and natural gas statements
- Building Mechanical Drawings HVAC riser diagrams, mechanical equipment schedules, and floor plans
- Operating Schedules Tenant occupancy profiles, cleaning shifts, and baseline weekend setpoints
- Service & Maintenance Logs Recent chiller overhauls, boiler burner tests, or controls upgrades
How does our audit engagement process unfold?
Every audit engagement follows five sequential phases: initial intake, documentation review, on-site diagnostics, energy modeling, and deliverable presentation.
Project milestones and engineering timelines remain fully transparent from day one. For a typical 100,000 square foot commercial property in Charlotte, the detailed Level II audit unfolds over four to six weeks:
Phase 1: Pre-Audit Utility Review
Historical utility statements establish the building Energy Use Intensity (EUI) against regional ASHRAE benchmarks. Tariff classifications and weather-normalized seasonal variations undergo meticulous preliminary review.
Phase 2: On-Site Field Diagnostics
The lead energy auditor inspects central plants, rooftop air handlers, switchgear panels, and representative tenant zones. Three-phase CT data loggers record active loads across two full weekly occupancy cycles.
Phase 3: Calibrated Energy Modeling
An hourly thermodynamic building model is built in eQuest using historical Charlotte weather files. Proposed energy efficiency measures (EEMs) are modeled individually to capture interactive thermodynamic effects.
Phase 4: Deliverable Presentation
Final investment-grade audit reports include equipment life-cycle cost schedules, prioritized payback rankings, and an in-person briefing for property owners and facilities engineering leadership.
What commercial expectations do we clarify up front?
We state our fee ranges clearly, never guarantee utility rebate approvals, and do not provide speculative contingency audits.
In strict compliance with Google Ads, Microsoft Advertising, and Meta Ads financial disclosure standards, Westbridge makes every financial premise unambiguous:
- Audits are fee-for-service engineering evaluations: A walkthrough audit costs $1,000 to $2,000; a detailed audit costs $5,000 to $15,000; and area-based portfolio reviews range from $0.05 to $0.50 per square foot. Fees depend on facility area, mechanical complexity, and documentation completeness.
- Calculations are engineering estimates: Savings calculations reflect calibrated hourly modeling under baseline operating schedules and historical weather data. No utility rebate, tax incentive, or future bill reduction is guaranteed.
- Zero equipment retailing: We do not sell machinery, replacement filters, or controls licenses. Our reports are independent engineering documents.
For full legal terms, payment structures, and liability boundaries, please review our comprehensive Terms of Engagement or consult our Practice Background.