An Existing Home NatHERS Assessment provides an independent assessment of a home's current thermal performance.

Unlike new home NatHERS assessments undertaken for building permits, Existing Home NatHERS assessments evaluate how an existing dwelling is performing today and identify opportunities to improve comfort, energy efficiency and overall building performance.

Geokal Services provides Existing Home NatHERS assessments throughout Victoria for homeowners, landlords, investors and housing providers.

Existing Home NatHERS assessments are designed to:

✅ Assess current thermal performance

✅ Identify areas of heat loss and heat gain

✅ Review insulation and building fabric

✅ Evaluate heating and cooling performance

✅ Identify upgrade opportunities

✅ Support future energy efficiency planning

Many property owners want to understand:

• Why is my home cold in winter?
• Why is it difficult to keep cool in summer?
• Does my property need more insulation?
• Would electrification improve performance?
• Which upgrades should I prioritise first?

An Existing Home NatHERS Assessment provides objective performance information to help answer these questions.

Assessment of:

• External walls
• Roof and ceilings
• Floors
• Windows
• Doors

Review of:

• Ceiling insulation
• Insulation coverage
• Insulation opportunities

Assessment of:

• Existing systems
• Thermal comfort performance
• Upgrade opportunities

Identification of:

• Thermal weaknesses
• Heat loss pathways
• Building performance issues

Including:

✅ Existing Home Energy Rating

✅ Building Performance Summary

✅ Key Findings

✅ Upgrade Recommendations

✅ Performance Improvement Opportunities

✅ Building Performance Observations

 Properties assessed often benefit from:

• Ceiling insulation
• Draughtproofing
• Reverse-cycle heating and cooling
• Heat pump hot water systems
• Window improvements
• Electrification upgrades

Understand how your home performs.

Identify opportunities to improve rental property performance.

Support landlords with independent assessment information.

Assess housing stock and prioritise future upgrades.

Understand future investment opportunities.

✅ Rental Energy Audit

✅ Rental Compliance Assessment

✅ Housing Asset & Performance Assessment

✅ Electrification Readiness Assessment

✅ Community Housing Upgrade Readiness Assessment

Contact Geokal Services to discuss Existing Home Assessment for individual properties or housing portfolios.

📞 (03) 9052 5037

📧 mail@geokal.com.au

A new home NatHERS assessment is used to demonstrate compliance with building regulations. An Existing Home NatHERS Assessment evaluates the performance of an existing dwelling and identifies upgrade opportunities.

Yes. The assessment identifies areas where performance may be improved and may include recommendations for future upgrades.

Yes. Existing Home NatHERS Assessments are suitable for homeowners, landlords, investors and housing providers.

Yes. Assessments can be undertaken for individual dwellings or housing portfolios.

Not always. However, blower door testing can provide additional information about air leakage and may complement an Existing Home NatHERS Assessment.