Quantifying the High-Performance Green Premium in NYC.
Certified Green Home Appraiser (CGHA) // Lead Appraiser Logan Walsh
Valuation is no longer just about square footage; it’s about BTU efficiency, envelope performance, solar PV net metering, and passive building science.
We provide the forensic data required to capture the 10–15% "Green Premium" often missed by generalist appraisers. Utilizing the official Appraisal Institute Fannie Mae Form 820.05 Energy Addendum to defend sustainable asset value to lenders and courts.
Sustainable Asset Valuation & Green Premium
Logan Walsh, CGHA — Accurate Appraisals NY
The 3 Pillars of Green Home Valuation
High-performance homes with Passive House envelopes, solar arrays, and geothermal HVAC systems command premium prices, but only when accurately modeled in the appraisal report.
Thermal & Building Science Audit
We evaluate air-tightness, thermal resistance (R-values), triple-pane glazing, and HERS index scores to quantify mechanical operating efficiency.
Utility Capitalization Modeling
Converting net-metered solar PV generation and battery storage savings into Net Present Value (NPV) added directly to the property's contributory asset value.
Paired Sales & Market Evidence
Generalist appraisers often default to standard comps, penalizing green homes. We isolate high-performance features via paired sales data to substantiate the green market premium.
Fannie Mae Form 820.05 Integration
Every green appraisal incorporates the official Appraisal Institute Energy Addendum.
Solar Photovoltaic (PV)
Evaluation of kW capacity, inverter warranties, tilt angle, shading analysis, and grid feed-in tariffs.
Geothermal & Heat Pumps
Ground-source loops, Variable Refrigerant Flow (VRF) multi-splits, and high-COP air-source heat pump modeling.
High-Performance Fenestration
Triple-pane argon insulated glass units, low-emissivity coatings, thermally broken frames, and SHGC ratings.
Passive House (ERVs/HRVs)
Energy Recovery Ventilators providing continuous fresh air filtration with 90%+ sensible heat recovery efficiency.
3-Step Certified Green Engagement Protocol
Documentation & Energy Intake
Intake of HERS ratings, LEED certificates, solar generation records, utility bills, and mechanical specifications.
Building Science Inspection
On-site verification of thermal envelope, mechanical equipment efficiency ratings, and execution of Form 820.05.
Certified USPAP Report Delivery
A court-tested, lender-defensible valuation report containing full energy capitalization and paired sales adjustments.
Capture the Full Market Value of Your High-Performance Home
Don’t let a generalist appraiser ignore your solar, geothermal, or Passive House investments. Contact Logan Walsh, Certified Green Home Appraiser, today.