Search Williams County Parcel Records, Verify True and Full Value, Pay Taxes and Review an Assessment
Use this guide to find a Williams County property card, search by parcel number or address, check current and historical taxes, download a bill, view the parcel map, understand taxable value, apply for available credits and research recorded deeds.
Williams County does not use a Texas-style County Appraisal District. Property valuation is handled by the Williams County Assessor, tax bills and payments are handled by the Treasurer, and deeds and legal documents are handled by the Recorder.
Official portals are needed only for live records, applications, payments and final document searches.Quick Answer: Choose the Correct Williams County Office
The Three Official Property Search Systems
| Official Tool | Best Use | Important Result |
|---|---|---|
| Property Cards | Valuation, land, buildings, permits, acreage, property sketch and sales research. | Parcel details and assessor record card. |
| iTax | Current and historical taxes, valuation history, online payment and tax-bill download. | Tax balance, payment status and current statement. |
| Address and Parcel Explorer | Map-based search by parcel, owner or address. | Parcel location, owner, mailing address and tax-information link. |
Jump Directly to Your Task
How to Search Williams County Property Cards
The official property-card system is the best starting point for real-estate valuation, building details, permits, acreage, structures, sketches and comparable-property research.
Use Williams County Property Cards. Confirm the page identifies Williams County and North Dakota before searching.
Use real estate when you have a parcel number or address. Use building or sales searches when researching structures or comparable properties.
A parcel number is usually the most precise. For an address, start with the street number and street name without unnecessary punctuation.
Compare the property address, parcel number, owner, legal description and jurisdiction before opening a result.
Check acreage, property class, true and full value, building dimensions, construction details, year built, permits, additions and sketches.
Use the same parcel number in iTax, the parcel map, billing-address requests and Recorder research.
Best Property Search Method by Situation
| Information Available | Best Tool | What to Verify |
|---|---|---|
| Parcel number | Property Cards or iTax | Owner, address, tax year and property class. |
| Street address | Property Cards | Correct city, township, unit and parcel number. |
| Owner name | iTax or Parcel Explorer | Every parcel connected with the owner and the correct mailing address. |
| Map location only | Address and Parcel Explorer | Parcel outline, address, owner and linked tax record. |
| Tax amount or receipt | iTax | Tax year, balance, payment date and special assessments. |
| Book, page or recording number | Recorder or iDocMarket | Document title, parties, date and legal description. |
| Mineral-owner question | Recorded-document research | Mineral deeds, reservations, assignments and chain of title with professional help. |
How to Search Williams County Taxes and Download a Bill
Williams County iTax provides current and historical valuations, property taxes, online payments and a downloadable copy of the most recent tax bill.
Use Williams County iTax.
Search by parcel number, owner name or property address. Entering several different criteria can prevent a valid account from appearing.
Try the owner name in last-name, first-name order. For a company, use the main legal business name without unnecessary punctuation.
Match the parcel number, owner, property address, city, subdivision or section-township-range information.
Check the current balance, historical years, payments, special assessments and delinquent status.
Select “Show Current Tax Bill” on the property-record page and save the PDF for your records.
How to Use the Williams County Address and Parcel Explorer
The Address and Parcel Explorer allows map-based searching by parcel number, owner name or address. It can show the parcel number, property address, owner, mailing address and a link to tax information.
Use the county’s Address and Parcel Explorer.
A parcel number is more reliable than clicking a location manually, particularly where several rural parcels are close together.
Check the owner, mailing address, physical address and tax-information link before using the record.
Consider municipality, township, road access, acreage, land class, improvements, utilities and special assessments.
How to Read a Williams County Property Record
| Record Field | Plain-Language Meaning | What to Check |
|---|---|---|
| Parcel number or PIN | The identifier assigned to the parcel. | Use the same number across the property card, iTax and parcel map. |
| Owner | The ownership name shown in county property systems. | Compare it with the latest recorded deed when ownership recently changed. |
| Property address | The physical or assigned situs address. | Do not confuse it with the tax-billing address. |
| True and full value | The assessor’s estimate of full property value. | Land, buildings, condition, permits, sales and property class. |
| Taxable value | The value to which mill levies are applied. | Residential property generally uses 4.5% of true and full value; commercial and agricultural property generally use 5%. |
| Land information | Acreage, classification and land value. | Gross acreage, usable acreage, soil, access and agricultural classification. |
| Building information | Recorded characteristics of structures. | Size, age, quality, condition, additions, permits and property sketch. |
| Special assessments | Charges that can be separate from value-based property taxes. | Current annual amount and remaining payoff balance. |
| Taxing districts | County, city, township, school and other entities receiving tax revenue. | A property’s location controls which entities and mill levies apply. |
How Williams County Property Tax Is Calculated
A mill equals one-thousandth of taxable value. The final bill depends on the property’s taxable value and the combined mill levies adopted by the applicable taxing entities.
County example
| Calculation Step | Example |
|---|---|
| Residential true and full value | $200,000 |
| Taxable value | $200,000 × 4.5% = $9,000 |
| Value of one mill | $9,000 ÷ 1,000 = $9 |
| Example combined levy | 200 mills |
| Example tax | 200 × $9 = $1,800 |
Williams County 2026 Property Tax and Assessment Dates
| Date | What It Means | Status on July 10, 2026 |
|---|---|---|
| February 1 | Annual assessment date and county deadline listed for many exemption applications. | Passed Contact the Assessor about any available correction or late procedure. |
| February 17 | Last published date to receive the 5% discount for paying 2026 real-estate taxes in full. | Passed |
| March 2 | First-half real-estate taxes and special assessments were due. | Past due if unpaid |
| March 31 | Farm Gross Income statements and certain credit applications were due. | Passed |
| April 1 | 2026 North Dakota Primary Residence Credit application deadline. | Closed for 2026 |
| April | Cities and organized townships hold local equalization meetings. | Completed |
| First 10 days of June | County Board of Equalization meets and values move toward state certification. | Completed |
| July 1 | Published first-half real-estate penalty increased to 9%. | Current first-half penalty stage |
| Second Tuesday in August | State Board of Equalization meeting. | Upcoming |
| October 15 | Second-half real-estate taxes are due. The first-half penalty reaches 12% on this date. | Upcoming |
| October 16 | Published second-half penalty begins at 6%. | Future if second half remains unpaid |
| November 1 | County timeline lists the final date for an abatement involving value set two years earlier. | Seek case-specific guidance |
Williams County Property Tax Credits and Exemptions
Most local applications are returned to the Williams County Assessor unless the program directs applicants to the North Dakota Office of State Tax Commissioner.
| Program | Who It May Help | Important Action |
|---|---|---|
| Primary Residence Credit | North Dakota homeowners occupying the property as their primary residence, without an age or income restriction. | Apply online through the State Tax Commissioner annually from January 1 through April 1. Current maximum credit is up to $1,600. |
| Homestead Property Tax Credit | Qualifying homeowners age 65 or older, or permanently and totally disabled, subject to current program rules. | Apply annually and use the current state form and income guidelines. |
| Disabled Veterans Credit | Qualifying veterans with a service-connected disability of 50% or greater and certain surviving spouses. | Provide current disability and ownership documentation. First-year filing is generally due March 31. |
| Blind or Disabled Exemption | Qualifying blind homeowners and certain permanently and totally disabled wheelchair users. | A physician certificate is required with the initial application; annual application is listed as due February 1. |
| Farm Residence Exemption | Active farmers, retired farmers, beginning farmers, farm laborers, surviving spouses and certain vacant farm residences. | Choose the correct category and provide the required annual farm-income information. |
| General charitable or religious exemption | Qualifying charitable, religious and similar organizations. | Contact the Assessor before filing because ownership and use requirements apply. |
| New residential construction exemption | Eligible builders and homeowners with qualifying new single-family construction outside incorporated city limits. | Review the Williams County Builder and Buyer Housing Incentive Program before the February 1 or October 1 implementation deadlines. |
Farm Residence Exemption Preparation
Williams County lists several farm-residence categories. An active farmer generally must show that the farmer and spouse received more than 66% of their combined annual gross income from farming activities in one of the two preceding calendar years.
- Select the correct farm-residence category.
- Complete the annual exemption application.
- Prepare ownership and occupancy information.
- Complete the Statement of Farm Gross Income.
- Include both spouses’ income where required.
- Keep federal tax and farm-income records supporting the statement.
- Submit the exemption application by the applicable February deadline.
- Submit the required income statement by March 31.
Williams County Builder and Buyer Housing Incentive
Williams County operates a housing program combining certain new-construction property-tax exemptions with financial assistance. Availability, funding and eligibility can change.
| Requirement | Published Program Detail |
|---|---|
| Location for tax exemption | Within Williams County but outside an incorporated city. |
| Construction date | Program materials apply to qualifying construction after April 15, 2025. |
| Builder benefit period | Construction year and the following two taxable years for a qualifying unoccupied builder-owned home. |
| Regular assessment deadline | February 1 for inclusion in the current assessment. |
| Final implementation deadline | October 1 before final tax statements are generated. |
| Program expiration | December 31, 2027 unless amended, rescinded or extended. |
Review current Williams County housing-incentive availability and applications.
How to Question or Challenge a Williams County Assessment
Start with the Assessor before the applicable equalization meeting. A factual correction or clear valuation explanation may resolve the issue without a longer review.
Williams County sends a notice when the assessment rises by at least $3,000 and more than 10% over the prior valuation. Note the property, new value and meeting details.
Check acreage, classification, construction details, finished area, additions, permits, quality, condition and true and full value.
Separate a factual record error from a value disagreement, exemption issue, classification problem or concern about tax rates.
Call 701-577-4555 and provide the parcel number. Ask how the value was determined and which evidence will be useful.
Use dated photos, sales, repair estimates, leases, construction records, permits, agricultural evidence or other documents relevant to the assessment date.
Cities generally hold local equalization meetings during the first 15 days of April, organized townships during April, and the County Board meets during the first 10 days of June.
Because the 2026 local and county meetings have passed, contact the Assessor immediately about State Board timing, an abatement application or another remedy applicable to the facts.
Evidence Ideas by Williams County Property Type
| Property Type | Useful Evidence | Common Comparison Error |
|---|---|---|
| Williston residence | Recent comparable sales, condition photos, repairs, finished area and neighborhood differences. | Using newer homes or different subdivisions without adjustment. |
| New construction | Construction stage, permits, completion date, invoices and occupancy date. | Comparing an incomplete structure with a finished occupied home. |
| Agricultural land | Soil, productivity, acreage, access, drainage, farm use and lease records. | Comparing agricultural acreage with development land. |
| Rural residence or acreage | Road access, utilities, well, septic, outbuildings, distance and usable acreage. | Treating every acre as equally usable. |
| Commercial or oilfield-related property | Occupancy, leases, income, expenses, condition, site improvements and comparable use. | Comparing specialized industrial property with general commercial space. |
| Mobile home | Permit status, year, size, condition, additions, ownership and land-lease details. | Assuming the mobile home and underlying land are one account. |
| Vacant development parcel | Zoning, access, utility availability, topography, subdivision status and special assessments. | Ignoring infrastructure and assessment costs. |
How to Pay Williams County Property Taxes
Online payment steps
Use the secure official iTax portal.
Use the parcel number, owner or address. A parcel number is preferred when several similar records exist.
Check current and prior years, payment history, penalties, special assessments and any delinquent balance.
The county states that processing fees apply to card, debit and e-check payments. Read the amount shown before authorizing payment.
Keep the transaction number, date, amount, parcel number and payment method.
Mail and office details
| Method | Address or Contact | Practical Tip |
|---|---|---|
| USPS mail | Williams County Treasurer’s Office, P.O. Box 2047, Williston, ND 58802-2047 | Write the parcel number on the check and retain mailing evidence. |
| UPS, FedEx or courier | Williams County Treasurer’s Office, 1st Floor, 206 E Broadway, Williston, ND 58801 | Do not send courier packages to the P.O. Box. |
| In person | Administration Building, 1st Floor, 206 E Broadway, Williston | Bring the statement or parcel number. |
| Phone | 701-577-4530 | Ask for the current total and processing fee before authorizing payment. |
2026 Real-Estate Tax Penalties
| Unpaid Amount | Date | Published Penalty |
|---|---|---|
| First half and special assessments | March 3 | 3% |
| First half and special assessments | May 1 | 6% |
| First half and special assessments | July 1 | 9% |
| First half and special assessments | October 15 | 12% |
| Second half | October 16 | 6% |
| Remaining delinquent balance | January 1 of following year | Interest begins at 1% per month. |
Williams County Mobile Home Tax Schedule
Mobile-home taxes follow a different published penalty schedule from real-estate taxes. Statements are commonly mailed around January 10, with some earlier statements issued for owners who returned required applications sooner.
| Mobile Home Installment | Date | Published Penalty |
|---|---|---|
| First half | March 3 | 2% |
| First half | April 1 | 4% |
| First half | May 1 | 6% |
| First half | June 1 | 8% |
| Second half | July 1 | 2% |
| Second half | August 3 | 4% |
| Second half | September 1 | 6% |
| Second half | October 1 | 8% |
How to Find a Special Assessment Payoff
County-managed special-assessment payoff information can be viewed through iTax. City-managed special assessments may require direct contact with the relevant city.
Open the correct parcel record.
Select “Detail” in the center Taxes section.
The table can show the current-year bond principal and interest plus the remaining payoff balance for county-managed assessments.
How to Search Williams County Deeds, Mortgages and Liens
The Williams County Recorder states that historical images, documents and tract indexes are digitized and searchable from patent to the present.
Keep the owner name, parcel number, legal description, subdivision, section-township-range or known recording number.
The public can search records at the Recorder’s Records Room or create an account for online access through iDocMarket.
Use land description, party name in last-name, first-name format, book and page, recording number, date or document title.
Use the document type and date range to avoid broad searches that reach the online system’s result limit.
A matching owner name does not prove a document belongs to the same parcel. Compare the land description and recording history.
Use the Recorder when you need an official or certified copy rather than only an online research image.
Recorder search costs
| Search Method | Published Cost | Important Detail |
|---|---|---|
| Records Room search | Free to search | Documents can be printed but not downloaded from the Records Room. |
| Records Room print | $1 per page or $0.10 per image | Card payments can include a fee. |
| iDocMarket monthly access | $15 per month | Provides online search access. |
| iDocMarket daily access | $5 for 24 hours | Useful for one-time short research. |
| iDocMarket document image | $1 per page to print or download | Charges are processed under the service’s billing rules. |
Mineral Rights and Surface Ownership in Williams County
Williams County is in a major oil-producing region, but a surface-property record does not automatically identify every mineral owner or royalty interest.
Useful mineral research details
- Current and prior surface-owner names
- Full legal land description
- Section, township and range
- Mineral deeds and reservations
- Assignments and releases
- Probate and estate documents
- Oil and gas leases
- Recording numbers and dates
- Professional interpretation of fractional interests
How to Change the Williams County Tax-Billing Address
The Treasurer manages property-tax billing addresses. Updating an address with another office or the Postal Service may not automatically update the county tax account.
Use the property card, iTax or parcel explorer.
Keep the owner name, email, phone, parcel number and property address ready.
Use the official tax-billing address request.
Confirm the new address appears in iTax and on the next bill. Contact the Treasurer if the old address remains.
Williams County Property Buyer Due-Diligence Checklist
- Parcel number and physical address
- True and full value
- Residential, commercial or agricultural class
- Acreage and building details
- Permits and improvement sketch
- Assessment history
- Current and prior tax balances
- Payment history
- Special-assessment annual amount
- Remaining payoff balance
- Delinquency or foreclosure status
- Correct taxing districts
- Most recent deed
- Mortgages and satisfactions
- Liens and judgments
- Easements and restrictions
- Plats and full legal description
- Mineral reservations and recorded interests
- Boundary survey
- Legal and physical access
- Zoning and permitted use
- Water, sewer, well and septic
- Flood, drainage and soil
- Road and utility costs
- Mobile-home or construction permits
Local Williams County Property Considerations
| Property Situation | Extra Checks | Why It Matters |
|---|---|---|
| Williston city property | City taxes, utilities, special assessments, zoning and permits. | City and unincorporated parcels can have different taxing entities and services. |
| Unincorporated new home | Housing incentive, road access, well, septic, utilities and exemption eligibility. | Some county programs apply only outside incorporated city limits. |
| Agricultural property | Farm use, soil productivity, residence exemption and farm-income documents. | Agricultural land valuation and farm-residence benefits have specific requirements. |
| Oilfield-related commercial property | Specialized improvements, income, occupancy, heavy-use condition and industrial location. | General retail or office comparisons may not reflect specialized utility. |
| Rural acreage | Legal access, roads, utilities, soil, drainage and actual usable acreage. | Gross acreage does not always equal developable or productive acreage. |
| Property with mineral activity | Recorded leases, easements, surface-use agreements and mineral reservations. | Surface use and mineral ownership can be separated. |
Common Search and Tax Problems
| Problem | Fast Fix | Correct Office or Tool |
|---|---|---|
| Address search returns no property | Remove the street suffix, direction or unit and search fewer words. | Property Cards |
| Owner search returns too many records | Add the first name, property address or city after a broad surname search. | iTax or Parcel Explorer |
| Recent buyer is not shown | Confirm that the deed was recorded and note the recording number. | Recorder, then Assessor |
| Building details appear wrong | Collect photos, plans, permits and reliable measurements. | Assessor |
| Paid tax still appears unpaid | Check the receipt and normal posting time before paying again. | Treasurer |
| Need the current delinquent payoff | Use iTax or call the Treasurer rather than an old statement. | Treasurer |
| Special assessment amount is unclear | Open Taxes, then Detail in iTax and distinguish annual payment from payoff. | iTax, city or County Finance |
| Need a full legal description | Use the deed or recorded plat instead of the abbreviated property-card text. | Recorder |
| Need mineral-owner information | Research recorded mineral documents and hire a qualified landman when needed. | Recorder records and professional title research |
| Missed equalization meeting | Contact the Assessor immediately and ask about the next available review or abatement route. | Assessor |
Williams County Property Office Details
| Office | Contact Details | Use It For |
|---|---|---|
| Williams County Assessor |
Department Head: Lea Dunn 206 E Broadway, 1st Floor, Williston, ND 58801 Mailing: P.O. Box 2047, Williston, ND 58802-2047 Phone: 701-577-4555 Hours: Monday–Friday, 8:00 AM–5:00 PM |
Values, property cards, assessment notices, exemptions and equalization questions. |
| Williams County Treasurer |
206 E Broadway, 1st Floor, Williston, ND 58801 Mailing: P.O. Box 2047, Williston, ND 58802-2047 Phone: 701-577-4530 Fax: 701-577-4535 Hours: Monday–Friday, 8:00 AM–5:00 PM |
Bills, payments, receipts, penalties and delinquent taxes. |
| Williams County Recorder |
206 E Broadway, 1st Floor, Williston, ND 58801 Mailing: Attn. Recorder’s Office, P.O. Box 2047, Williston, ND 58802-2047 Phone: 701-577-4540 Fax: 701-577-4535 Hours: Monday–Friday, 8:00 AM–5:00 PM |
Deeds, mortgages, liens, plats, recording data and document copies. |
Williams County Administration Building Map
The Assessor, Treasurer and Recorder are listed in the Williams County Administration Building at 206 E Broadway in Williston.
Official Williams County Property Resources
Use these official links for the final search, application, payment or document action.
Top 10 Williams County Property Search FAQs
1. Is Williams County CAD the official name of the property office?
No. Williams County, North Dakota does not use a Texas-style county appraisal district. Property valuation is handled by the Williams County Assessor, taxes are collected by the Treasurer, and deeds are recorded by the Recorder.
2. How do I search Williams County property records by address?
Open the official Williams County Property Cards site and use the real-estate address search. Start with the street number and street name, remove unnecessary suffixes if no result appears, and confirm the parcel number and owner.
3. How do I find a Williams County parcel number?
Search the Property Cards system, iTax or the Address and Parcel Explorer by property address or owner name. The parcel number shown on the matching record can then be used across the county property systems.
4. Where can I download a Williams County property tax bill?
Search the parcel in Williams County iTax. On the property-record page, select “Show Current Tax Bill” to open and save the most recent statement.
5. When are Williams County property taxes due in 2026?
The first half and special assessments were due March 2, 2026. The second half is due October 15, 2026. Full payment by February 17 qualified for a 5% discount on the consolidated real-estate tax.
6. What is the difference between true and full value and taxable value?
True and full value is the assessor’s estimate of full property value. Taxable value is the smaller amount to which mill levies are applied. Residential taxable value is generally 4.5% of true and full value, while commercial and agricultural taxable value is generally 5%.
7. How do I challenge a Williams County property assessment?
Review the Notice of Increase and property card, collect evidence tied to the February 1 assessment date and contact the Assessor. Local equalization meetings occur in April and the County Board meets during the first 10 days of June. After those dates, ask the Assessor which state review or abatement procedure remains available.
8. How much is the 2026 North Dakota Primary Residence Credit?
The current state program provides an approved homeowner with a credit of up to $1,600, limited by the property tax due. The 2026 application window ran from January 1 through April 1 and the application was online only.
9. Where do I search Williams County deeds, mortgages and liens?
Use the Williams County Recorder’s Records Room or iDocMarket. Search one criterion at a time, such as party name, land description, recording number, book and page, date or document title.
10. Can the Williams County Recorder tell me who owns the mineral rights?
No. The Recorder provides access to recorded documents but does not determine mineral ownership. Mineral-title research may require a qualified landman, attorney or title professional.
Independent Guide and Editorial Note
County-CAD.us is an independent informational website. It is not affiliated with the Williams County Assessor, Williams County Treasurer, Williams County Recorder, Williams County Government or the North Dakota Office of State Tax Commissioner.
Property values, tax balances, credits, deadlines, penalties, program funding, recorded-document fees and office procedures can change. Use the linked official source for the final search, filing, payment or document action.
Editorial review: July 10, 2026. The article was corrected from generic CAD terminology to the official Williams County, North Dakota Assessor, Treasurer and Recorder structure. Property-search tools, 2026 tax deadlines, current Primary Residence Credit, equalization procedures and Recorder instructions were checked against official sources.
Estimate Taxes, Exemptions, Escrow, Protest Savings and Next Steps
This sitewide tool helps homeowners, buyers, sellers and investors understand property tax numbers before they check the official county appraisal district or tax office. It runs in your browser, does not collect personal data and gives practical next steps after each calculation.
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Estimate annual tax using property value, assessment ratio, exemptions and local tax rate.
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Estimate how much a homestead, senior, disabled, veteran or local exemption may reduce annual tax.
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Estimate monthly property tax, insurance, HOA and reserve cushion. Useful for buyers and homeowners comparing affordability.
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Estimate how a value increase or appraisal cap may affect taxable value. Rules vary by state, county and exemption status.
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