Your request is being processed, please wait.
Skip to content

Supplementary taxes for new construction

If your property is newly built and was completed/occupied during the current year, you will receive a supplementary assessment and taxation notice.

Property taxes are calculated by prorating the supplementary assessment based on the number of months the building has been completed/occupied during the year. This prorated assessment is then multiplied by the applicable tax rate.

If construction is completed after Dec. 31, you will receive a supplementary assessment and tax notice in the current year to reflect the increased value of the property.

How supplementary taxes are calculated

Scenario:

  • Your home's supplementary assessment value is $600,000
  • It was completed/ occupied on July 1 (six months of occupancy)
  • The annual tax rate is 0.006 (or 0.6%)
Step 1: Prorate the assessment by months occupied
$600,000 x 6/12 months = $300,000
 
Step 2: Apply the current tax rate 
$300,000 x 0.006 = $1,800
 
The supplementary property tax for the year would be $1,800.

The supplementary assessment is based on typical market values as of July 1, of the previous year.

Supplemental Scenario rESIDENTIAL SINGLE FAMILY
Total assessment $600,000
Less previous assessment on annual tax notice   - $300,000
Supplementary assessment $300,000
   
($300,000 x 6/12 Months) $1,800

The tax levy is applied to the prorated supplementary assessment to calculate the taxes due on the supplementary assessment.

Assessments are based on typical market values as of July 1, of the previous year.

Supplementary assessment dates

important dates notices and due times
Sept. 28, 2026 Supplementary assessment notices mailed
Oct. 6, 2026 Supplementary notice of assessment date
Oct. 30, 2026 Supplementary taxes due
Dec. 7, 2026 Supplementary complaint due date