Sully County Property Appraiser & Tax Assessor
Real property appraisal records, parcel search lookup, property tax rates, and assessment protest deadlines for Sully County, South Dakota.
Sully County Assessor's Office Information
Sully County Appraisal & Assessment Office, Onida, SD 46001
Get Driving Directions ↗Monday - Friday: 8:00 AM - 4:30 PM (Local Time)
Closed on state & federal holidays.
(605) 223-6689
Beacon / Director of Equalization Portal
Sully County Property Tax Calculator
Estimated using Sully County's effective tax rate of 1.08% (Assessment ratio: 100%)
Appealing Your Sully County Assessment
First Tuesday in April to the County Board of Equalization.
Under South Dakota property tax law, property owners in Sully County have the legal right to challenge an assessed valuation that exceeds fair market value, is unequally appraised compared to neighboring properties, or contains clerical errors.
Contact the Sully County Assessor's Office to review your property record card, verify square footage, and present recent comparable sales (comps).
If informal review does not resolve the valuation, file a written notice of appeal with the County Board of Equalization before the statutory deadline.
Was Your Sully County Home Over-Assessed This Year?
Studies show up to 30% to 60% of US residential properties are overvalued by automated municipal algorithms. Protesting your assessment before the statutory deadline can lower your tax bill by an average of $1,100/year.
Sully County Homestead Exemptions & Tax Relief
Homeowners in Sully County who occupy their home as their permanent primary residence may qualify for property tax reductions under state and local homestead programs:
Property Tax Reduction Program for the Elderly and Disabled provides property tax discounts based on income.
Assessment Freeze for Elderly and Disabled locks home value for qualifying seniors 65+. 100% disabled veterans receive $150,000 valuation exemption.
Need Deed, Lien, or Title Records for Sully County?
While the Property Appraiser values real estate for taxation, official legal property transfers, warranty deeds, mortgages, and marriage records in Sully County are maintained by the County Clerk & Recorder.
Frequently Asked Questions
Where is the Sully County Property Appraiser office located?
The official Sully County property appraisal and tax assessment office is located at Sully County Appraisal & Assessment Office, Onida, SD 46001. Operating hours are typically Monday - Friday: 8:00 AM - 4:30 PM (Local Time). You can reach the customer service staff by phone at (605) 223-6689.
What is the property tax rate in Sully County, SD?
The average effective property tax rate in Sully County is approximately 1.08%. For a home with the median county market value of $217.000, the estimated annual property tax is about $2344 per year.
How do I search for a property or parcel in Sully County?
You can look up property record cards, assessed valuations, ownership history, and parcel boundary maps online through the official Sully County parcel search portal: https://www.sdcounties.org//assessor/parcel-search.
When is the deadline to appeal my property assessment in Sully County?
Property valuation protests and appeals in Sully County must be submitted by: First Tuesday in April to the County Board of Equalization. Appeals are formally reviewed and heard by the County Board of Equalization.
How does the Homestead Exemption work in Sully County?
Property Tax Reduction Program for the Elderly and Disabled provides property tax discounts based on income. Additional exemptions are available for senior citizens (65+) and disabled military veterans (Assessment Freeze for Elderly and Disabled locks home value for qualifying seniors 65+. 100% disabled veterans receive $150,000 valuation exemption.).
Adjacent & Neighboring County Appraisers
County Overview
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