For a more livable city from sidewalk to skyline

what we stand for

Advocacy

public space atrium at Trump Tower, 590 Madison Avenue
Planning
Advocates for Privately Owned Public Space

Protecting New York’s 80-acre network of public plazas and arcades

2000–present
Policy
City Environmental Quality Review Reform

Exploring ways to improve the City's CEQR process

2018–present
PlanningPolicyPreservation
Data Distillery

Data in translation

2024 - present
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Enduring Culture, a multivocal historic preservation vision for New York City

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Events + Tours

EventIn Person
Extreme Heat: Adapting Cities to Rising Temperatures
Wednesday, June 11 at 9:00 AM
Free!
Sold Out!
TourVirtual
Art Colony in Cornish, NH
with Sylvia Laudien-Meo
Friday, June 13 at 11:00 AM
Member: $15 | Non-member: $25
Buy Tickets
TourIn Person
Red Hook
with Zack Rhodes
Saturday, June 14 at 11:00 AM
Member: $25 | Non-member: $35
Buy Tickets
TourIn Person
Proper Chelsea
with James Russiello
Sunday, June 15 at 11:00 AM
Member: $25 | Non-member: $35
Buy Tickets
TourIn Person
Grand Central Terminal
with MAS Docent
Saturday, June 21 at 11:00 AM
Member: $25 | Non-member: $35
Sold Out!
TourIn Person
Pack Your Bags: Midtown West Hotels
with Matt Postal
Saturday, June 21 at 11:00 AM
Member: $25 | Non-member: $35
Buy Tickets
View All Events + Tours
children play on the shore near the Brooklyn Bridge. Photo: Giles Ashford.

MAS is proud to fight alongside you for a city where growth is balanced and character endures.

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Legacy

Celebrating 130 years of advocacy on behalf of New York and New Yorkers.
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Vintage transit map for New York City
1903
Advocating for a Consolidated Transportation System
View Our Full History