CoStar Opt Out Guide: Privacy Requests and Contact Routes

To opt out of CoStar or request deletion, use the contact route in its official Global Privacy Notice. CoStar lists an online privacy portal, a toll-free rights number at (800) 204-5960, and service-specific email contacts.

For CoStar information and analytics services, the published address is Support@costar.com. This CoStar opt out guide explains how to identify the correct service, request a specific privacy action, and handle verification. A request about personal information does not automatically remove a property listing or the underlying government record.

Sources were checked September 24, 2026. The official notice was readable through a source reader, but the notice and portal returned access-denied pages in our browser. We did not submit a request, call a number, or test removal. No screenshot of a functioning portal is claimed.

CoStar opt out routes and scope

Start at the CoStar Global Privacy Notice, not a paid removal advertisement. Its Contact Us section names different service teams. If your issue belongs to another listed product, use that product's contact rather than assuming the CoStar support address owns every account.

CoStar's notice covers a group of real-estate information products and marketplaces. Those services can hold business contact details, account information, communications, and data associated with property transactions. The categories depend on the product and interaction. Their appearance in a privacy notice does not establish that CoStar holds every category about you.

The notice distinguishes personal information from certain lawfully available government records. That is why the most useful first step is identifying the exact data you want removed. For other companies holding property-related information, the CoreLogic removal guide explains a separate workflow. Do not assume one request reaches both organizations.

How to make a manual privacy request

1. Identify the service and the unwanted information

Record the service name, relevant page address, and the personal detail causing concern. Examples include an outdated professional phone number, a former address attached to a profile, or marketing use of an account email. Keep copies privately; do not post the information in a public support discussion.

A property listing may be supplied by an agent or another business. Ask the service whether the remedy is a listing correction, an account setting, or a privacy request. Deleting an account can affect access to useful records without fixing an independently supplied listing. State your intended outcome before asking for broad deletion.

2. Choose the documented contact route

The notice links to the CoStar privacy portal. Our browser could not access it, so we cannot describe its current post-verification screens. If it loads for you, follow its instructions and choose only the action that matches your request. Do not treat an access-denied response as a submitted request.

For an email request about CoStar information services, use Support@costar.com as listed in the notice. The published toll-free rights number is (800) 204-5960.

These are documented alternatives, channels whose consumer-request handling was not tested. For another marketplace, check the current contact table before sharing information.

3. State the right and scope you want

Explain whether you want access, correction, deletion, or an opt-out of sale or targeted advertising. These are different actions. An unsubscribe request concerns communications; deletion concerns held information; a sale opt-out concerns future processing. Asking clearly reduces the risk of receiving a marketing unsubscribe response when you intended something broader.

A concise message can say that you are requesting deletion of personal information associated with the identified CoStar service, subject to applicable rights and exceptions. Add a separate sentence if you also want to opt out of sale or targeted advertising. Ask which information is needed to match your record and which secure channel to use.

Do not include payment details, passwords, or an identity-document scan in an initial support email. The notice says CoStar may request more information for matching and verification. Let the official team explain what is necessary for your particular request before sending additional sensitive material.

4. Complete verification and retain the response

CoStar says it may verify identity and residency by email or phone and compare submitted details with information already held. Monitor the contact method you used. A request can stall if the company cannot establish that the information relates to you. An acknowledgment alone does not establish that deletion has occurred.

• Save the date and route used to send the request.
• Keep the service name and relevant record address together.
• Record any case number and verification deadline supplied.
• Keep the final decision, including any retained-data explanation.

If you use an authorized representative, the notice allows requests through an authorized person. Ask what proof of authority is required. Do not assume that providing a relative's name gives you permission to request their data or delete an account on their behalf.

Product-specific examples before you send

If an Apartments.com interaction is involved, identify whether your concern is the platform account, a rental inquiry, or information already sent to a property manager.

The notice lists Support@apartments.com and (888) 658-7368 for its services. Ask the platform what it controls, then contact the landlord or property manager separately when their copy is the issue.

For LoopNet, Showcase or Cityfeet, the contact table lists Help@LoopNet.com and (800) 613-1303. Include the relevant listing or professional profile address. A correction to a business listing can be different from restricting processing of your personal contact details, so explain both outcomes when both matter.

For Homes.com-related services, the notice lists Support@homes.com. Identify the particular service and whether the concern is a profile, listing, message or account.

The group notice is a starting point for routing; it does not establish that every piece of information is controlled by the same team.

The contact table also separates Matterport, land-related services, STR and other products. Use the current table if your issue belongs to one of them. Sending a group-wide request without naming the product can make it harder to locate the relevant record, especially when you used different contact details across services.

Check the result against the original problem

Before sending a request, write down what a useful result would look like. An old work phone number should no longer be displayed on the specified profile, for example. A broader sale opt-out may instead be confirmed in correspondence without producing a visible page change. These outcomes need different evidence.

After the response, revisit only the relevant public pages and check the exact detail. Do not interpret an account login failure as proof that every data category was erased. If a search result still shows older text, compare it with the source page before asking whether another request is needed.

If the information remains, reply to the original case with the current page address and describe the difference between the response and what you can observe. Ask whether the page falls within the completed request or is controlled by a separate source. This creates a concrete follow-up without requiring you to resend all your identity information.

What to expect after submitting

There is no single completion time we can verify for every CoStar product and jurisdiction. The notice describes responses under applicable requirements, verification, and explanations when a request cannot be fully fulfilled. Treat any timeline in your acknowledgment as specific to that request, and ask about a delay rather than assuming silence means success.

If the response says the request was only partly completed, ask which categories remain and why. Information needed for an active service, a transaction, or a legal obligation may be treated differently from optional marketing data. This guide summarizes the provider's routes; it does not determine your legal entitlement in a specific dispute.

For a rejected request, the notice describes replying to the decision to seek reconsideration and providing useful supporting information. Appeal rights depend on jurisdiction. Keep the original case reference in the reply so that the team can connect the request and decision. Avoid opening several unrelated cases for the same record unless support directs you to do so.

If the portal is inaccessible, capture the error privately and use the published contact alternative. Include the affected URL and time of access, but omit browser cookies or login credentials. A support team needs enough context to identify the technical failure; it does not need a full browser export containing private sessions.

Listings, public records and reappearance

A privacy response from CoStar does not prove that a landlord, real-estate agent, customer, or independent website has deleted its copy. The notice describes disclosures to business customers and listing partners. Follow the data to the relevant source when the same detail remains visible elsewhere.

For example, correcting a professional contact may leave an older property brochure online. Removing an account may leave public transaction information at the original registry. The PropertyRadar opt-out guide and Buildertrend privacy guide cover distinct providers when those are actually involved.

Keep browser advertising controls separate from a database request. A cookie preference can change browser-based tracking without changing a named record held in a service. The opposite is also possible: a personal-data deletion response does not demonstrate that every browser on every device has your preferred advertising settings.

Recheck the specific page or contact detail after the provider's response. New source data, later account activity, or another supplier can create new exposure. That possibility is a reason to retain the request and check again, not evidence that a specific provider ignored a completed request.

For a broader plan, use the data broker opt-out list to identify the companies actually involved. The manual removal overview explains how to track separate requests without confusing one provider's confirmation with an internet-wide result.

Frequently asked questions

Can I remove every property record through CoStar?

No. The privacy notice does not promise deletion of every real-estate record or original government source. Identify the personal information and the service holding it. Ask separately about an incorrect listing, and contact the original record holder when that is where the issue begins.

Is unsubscribing from emails enough?

Not if your goal is deletion or a sale opt-out. Unsubscribing addresses promotional communications. State any broader request separately and retain the response. A quieter inbox is not proof that account, business-contact or property-related information has been deleted.

What if the portal says access denied?

Use the current notice's service-specific email or toll-free rights route. Our own browser received that block on September 24, 2026. We therefore describe documented alternatives rather than claiming that an unseen portal step works. Never enter personal information into a lookalike replacement site.

Does a request cover all CoStar brands?

Do not assume so. The group notice lists multiple services and contacts. Name each relevant service and ask the recipient to confirm scope. One group-level inquiry may help route the issue, but the response should identify what was actually processed.

Can a removal service guarantee the result?

No service can promise that every public record, customer-held copy, or legally retained record disappears. A provider coverage list is also not proof that a particular account or property dispute is supported. Check the exact service and request type before paying for assistance.

Sources and next steps

This guide relies on CoStar's official notice, contact table, and linked portal as checked September 24, 2026. The manual email/phone workflow is documented; submission, verification completion and removal speed were not tested. Screenshots were skipped after the access blocks rather than replaced with a fabricated form image.

Use the opt-out guide hub for other verified routes. If you also want to locate public people-search exposure, run a free data broker scan. A scan is a starting point for supported public listings, not a test of CoStar's private databases or a promise to remove property records.