General Advertising Guidelines

Download the Zillow Media Kit (1.2mb PDF)
The advertising content must be clearly identifiable as an advertisement.
The advertiser must fulfill the advertised offer as stated in the advertisement, including without limitation, not altering any offer periods, product offers or prices that are stated in the advertisement.
Advertisements cannot mislead the user. For example, ads may not mimic or resemble Windows/Mac/Unix dialog boxes, error messages, or the like.
Advertisements cannot solicit or collect, or appear to solicit or collect, any personally identifiable information from Zillow users without their knowledge.
Click-through URLs:
- - User clicks cannot launch stand-alone video/audio players or otherwise display content outside the standard browser window.
- - User clicks on ad creative may not result in the launch of multiple browser windows.

Standard Specifications

	Leaderboard	Wide Skyscraper	Medium Rectangle	Rectangle
Display dimensions	728 W x 90 H	160 W x 600 H	300 W x 250 H	180 W x 250 H
File size (Max)	25 KB	25 KB	25 KB	25 KB
Approved file formats	GIF, JPEG, PNG, HTML, Flash 6.0	GIF, JPEG, PNG, HTML, Flash 6.0	GIF, JPEG, PNG, HTML, Flash 6.0	GIF, JPEG, PNG, HTML, Flash 6.0
Alt text	Max 50 char incl. spaces	Max 50 char incl. spaces	Max 50 char incl. spaces	Max 50 char incl. spaces
Logo Dimensions	N/A	N/A	N/A	N/A
Position	Top/Bottom	Top/Bottom	Mid	Mid
Looping	Unlimited up to 15 seconds	Unlimited up to 15 seconds	Unlimited up to 15 seconds	Unlimited up to 15 seconds
Submission deadline	2 full business days before start date	2 full business days before start date	2 full business days before start date	2 full business days before start date

(All dimensions are in pixels)

Rich Media Specifications

Supported file formats: Atlas Rich Media, EyeWonder, Flash, PointRoll
Maximum file size: 40 KB
Alt text: Max 50 char incl. spaces
Must be accompanied by a backup ad in either GIF, JPEG, or PNG format
Non user-initiated video must be limited to 15 seconds
Audio and video expansion events must be user-initiated
Must include a clearly labeled button or link to stop audio/video
Submission deadline: 5 full business days before start date
Must be designed with a solid/opaque background to avoid color conflicts on display page

Flash Specifications

Requirements for Flash
- - For CPC campaigns, each Flash ad must contain the following clickTAG tracking code:

on (release) { if (clickTAG.substr(0,4) == "http") { getURL(clickTAG, "_top"); }}

Please do not hard-code the click-through URL. Contact the Zillow Ad Team via e-mail at for help with clickTAG tracking.

Placements

Only one rich media ad per page (exception: non-video Flash ads)
Supported display dimensions:
- - 728x90 (Leaderboard)
- - 160x600 (Wide Skyscraper)
- - 300x250 (Medium Rectangle)
Expansion rules:
- - Expansion must be user-initiated (click or mouseover)
- - Wide Sky must expand left
- - Top Leaderboard must expand down
- - Bottom Leaderboard must expand up
- - Medium Rectangle may expand right, up, or down (depending on the specific placement of the medium rectangle on the page)
Additional vendor-specific rules below

Vendor Details

Atlas Rich Media
- - All placements & pages supported
EyeWonder
- - Supported for both IE and Firefox
- - All placements & pages supported EXCEPT:
  - - Ads on maps top Leaderboard cannot expand more than 175 pixels
  - - Expanding ads for map bottom Leaderboard and Sky not supported
PointRoll
- - All placements & pages supported EXCEPT:
  - - Expanding HTML ads not supported

Additional specifications that amend or supersede these general guidelines may apply for individual ad products. For all other advertising related questions, including questions regarding third-party ad serving, rich media and JavaScript advertisements, please contact the Zillow Ad Team via e-mail at .

Thank you for your interest in advertising on Zillow. We look forward to working with you.