PortlandMaps.com
The Free Tool Every Portland Buyer and Seller Should Know
Most people searching for a home in Portland spend hours on Zillow or Realtor.com. That makes sense. But there is another tool that most buyers never hear about until they are already in escrow, and it is completely free.
It is called PortlandMaps.com, and it is run by the City of Portland.
Think of it as a public records office and a mapping tool combined into one place. You type in any Portland address and get back a detailed picture of that property, the neighborhood around it, and a surprising amount of information that no national real estate site will ever show you.
Here is what you can actually do with it.
Look up the permit history on any property
This one is underused and genuinely valuable. Before you make an offer on a home, you can pull up every building permit on record going back to 2000. Finished basement? There should be a permit for that. New electrical panel? Same. Updated plumbing? You can check.
If work was done without permits, that is important to know. It can affect your financing, your insurance, and your ability to sell the home later. PortlandMaps will not catch everything, but it gives you a head start before inspections even begin.
Check the zoning
Zoning tells you what is allowed on a property and what is not. If you are thinking about adding an ADU in the backyard, starting a home-based business, or buying a property as an investment, zoning matters a lot.
PortlandMaps shows you both the base zone and any overlay zones that apply. It links directly to detailed descriptions of what each designation means. This is information you would otherwise have to call the city to get.
Research crime statistics by neighborhood
PortlandMaps shows recent crime reports mapped by location. You can click on different areas around a property to see what has been happening in a roughly one-eighth mile radius. It is not a perfect picture of neighborhood safety, but it is a real data point from the city rather than an algorithm on a third-party site.
Find nearby schools, parks, and transit
For buyers with kids, or buyers who care about walkability, this section is practical. PortlandMaps shows you which schools serve a specific address, how far the nearest parks are, nearby bus stops, and distances to TriMet Park and Ride locations. It even links to the TriMet trip planner directly.
Look up recent sales and tax assessment data
You can see the assessed value of any property and compare it to nearby homes built in the same era with similar square footage. This does not replace a proper comparative market analysis, but it is useful context when you are trying to understand whether a listing price makes sense.
Sellers can also use this to see how their home's assessed value compares to neighbors before they sit down with an agent to talk about pricing.
Check for underground oil tanks
This one surprises people. Many older Portland homes, particularly those built before the 1970s, had underground oil storage tanks that were used for heating. Some were decommissioned properly. Others were not.
PortlandMaps has underground storage tank records. It is not a complete picture, and we always recommend also checking the Oregon DEQ database separately, but it is a good first check on any older property you are seriously considering.
Explore the map gallery
Under the Gallery tab in the top navigation, PortlandMaps has a full map gallery organized by category. It is the part most people never find, and it is worth knowing about.
Featured tools include Crime Reports in Portland, Portland Zoning, an Economic Vulnerability map, and an Explorer tool for browsing the city visually. Scroll further and you find Environmental Services maps covering regional topography, geology, soils, and groundwater. Jurisdictional Boundaries maps show city limits, county lines, school attendance areas, and council districts.
If you are buying in a hillside neighborhood in Southwest Portland, the topography and geology section is worth a look before inspections. If you are trying to understand school boundaries for a specific address, the Schools and School Districts lookup tool gives you a precise answer rather than a general estimate.
How we use it
Francisco and I use PortlandMaps on almost every transaction. It is part of how we do due diligence before offers go in and how we help sellers understand their property's public record before it hits the market. The permit history section alone has flagged issues that changed the direction of negotiations more than once.
If you want a walkthrough of what PortlandMaps shows on a specific address you are considering, that is exactly the kind of thing we are happy to do on a call.
Chat About a Property You Are Researching
A few things to keep in mind
PortlandMaps is a City of Portland tool, which means it works best for properties inside Portland city limits. If you are looking in the suburbs, each jurisdiction has its own mapping resource:
Washington County properties: Washington County Permits and Records
Milwaukie properties: City of Milwaukie GIS Map
Clackamas County properties: Clackamas County Maps
Hillsboro properties: Hillsboro Maps
These tools vary in what they show and how easy they are to navigate, but they are the official sources for permit history, zoning, and property data in those areas. If you are looking at a property outside Portland proper, start with the resource for that jurisdiction rather than assuming PortlandMaps will have complete information.
Data is also updated on a lag across all of these tools. Multnomah County pauses property data sharing annually during tax processing season, which can cause temporary gaps. Always cross-reference anything critical with your agent or directly with the county.
Kim Campbell & Francisco Salgado
Licensed Oregon Realtors
Ready to Talk About Buying in Portland?
We love helping buyers make sense of Portland’s housing market — quirks and all. From property taxes to neighborhood vibes, we’ll help you see the full picture so you can buy with confidence (and no surprises when that first tax bill arrives).
If you’re thinking about making a move, let’s chat. We’re Kim and Francisco, a husband-and-wife real estate team who know Portland block by block — from the quiet corners of Eastmoreland to the creative streets of Boise.
Disclaimer:
This information is provided for general educational purposes and should not be construed as legal, financial, or tax advice. Property tax laws and regulations can vary and change over time. Homeowners are encouraged to consult with a qualified tax professional, attorney, or local assessor’s office for guidance specific to their situation.
