Find answers to common questions about OpenSkagit's data, tools, and services
OpenSkagit is an AI-enhanced public data portal for Skagit County, Washington. We make county data accessible and useful through intelligent tools and natural language interactions.
You can:
There are several ways to find your property:
The system uses fuzzy matching, so you don't need to enter your address exactly. It will suggest the closest matches.
No, you don't need an account! All of OpenSkagit's tools and data are freely accessible without registration.
Yes, OpenSkagit is completely free for public use. We believe in making government data accessible to all citizens.
All features including the Property Tax Appeal Helper, neighborhood statistics, and API access are provided at no cost.
The Property Tax Appeal Helper uses advanced statistical methods to analyze your property assessment:
The tool follows IAAO (International Association of Assessing Officers) standards and uses the same valuation methodology as professional appraisers.
To file a property tax appeal, you typically need:
Our tool generates most of this documentation automatically. You can download a complete report with comparable sales, statistical analysis, and valuation estimates to support your appeal.
Important: Check with your county assessor's office for specific appeal deadlines and filing procedures.
We use a sophisticated similarity algorithm that considers:
The system uses semantic embeddings and vector similarity search to find properties that are most similar to yours across all these dimensions simultaneously.
Regression-based valuation is a statistical method that analyzes thousands of property sales to understand how different features affect property values.
How it works: The model learns from actual sale prices how much each property characteristic (size, age, location, etc.) contributes to value. It then applies these patterns to estimate your property's value.
Accuracy: Our models typically achieve:
These metrics meet or exceed IAAO standards for residential property assessment. View our full methodology for detailed statistics.
Yes! The appeal results page includes options to:
The report includes all comparable sales, property details, valuation estimates, and fairness analysis metrics you'll need for your appeal.
All data comes from official Skagit County public records:
We import this data directly from Skagit County's official databases and systems. No data is modified or estimated—we only analyze and present the official county records.
Data is updated on a regular schedule:
The most recent data update date is displayed on each tool and in the methodology documentation.
Note: There may be a small lag between when the county records a transaction and when it appears in our system.
We use hedonic regression analysis, a standard method in real estate valuation:
Each model is trained on thousands of verified sales and meets IAAO standards for assessment uniformity.
For complete technical details, model performance metrics, and actual coefficients, visit our Methodology page.
These are standard statistical measures of model quality:
Our models consistently achieve excellent ratings on all three metrics, indicating accurate and fair valuations across all price ranges.
Example: R² = 0.93 means 93% of the variation in sale prices is explained by property characteristics in our model.
A Comparative Market Analysis (CMA) is a detailed comparison of your property against similar properties that have recently sold.
Our CMA tool provides:
The CMA tool is used by real estate agents, appraisers, and property owners to understand market values.
Currently Available:
Coming Soon:
Yes! We provide a comprehensive REST API for accessing Skagit County data programmatically.
Available endpoints include:
The API is free to use and doesn't require authentication for public data endpoints.
Visit our API Documentation for complete details, examples, and interactive testing.
Developers can integrate OpenSkagit data in several ways:
REST API:
GET /api/properties/?address=123+Main+St
GET /api/sales/?neighborhood=ANACORTES&limit=50
GET /api/neighborhoods/ANA/stats/Common use cases:
Best practices:
Check the API documentation for complete integration guides and code examples.
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Explore the Property Helper or FAQ, or contact us directly for clarification.
Open Property Helper