AIA CES Credits
AV Office
Abstract Publication
Academic Affairs
Academic Calendar, Columbia University
Academic Calendar, GSAPP
Admissions Office
Advanced Standing Waiver Form
Alumni Board
Alumni Office
Anti-Racism Curriculum Development Award
Architecture Studio Lottery
Avery Library
Avery Review
Avery Shorts


STEM Designation
Satisfactory Academic Progress
Skill Trails
Student Affairs
Student Awards
Student Conduct
Student Council (All Programs)
Student Financial Services
Student Health Services at Columbia
Student Organization Handbook
Student Organizations
Student Services Center
Student Services Online (SSOL)
Student Work Online
Studio Culture Policy
Studio Procedures
Summer Workshops
Support GSAPP
This website uses cookies as well as similar tools and technologies to understand visitors' experiences. By continuing to use this website, you consent to Columbia University's usage of cookies and similar technologies, in accordance with the Columbia University Website Cookie Notice Group 6
Up browdy froelich hilaryho gertiema yahsuanyang sp23 asa.pdf

Impact of Tax Lien Sales in NYC

Research Question:
What were the impacts of tax lien sales on residents and property values in New York City from 2011 to 2021?

What is a Tax Lien Sale?
The NYC tax lien sales program was a legal policy that allowed the Department of Finance to lay claim to properties with unpaid municipal charges like property taxes and water bills. Properties with tax liens were then auctioned in an annual sale to both public and private investors. Investors can impose additional interest and fees to the property owners — eventually, many investors end up foreclosing on the lien and taking control over the property.

Why study it now?
The program in NYC began in 1996 and sunsetted in February 2022, resulting in widespread debate currently on the future of tax liens. Our research seeks to address key concerns around the impacts that this program had on specific demographics and property values.