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Where ADUs Are Changing the Game Across the U.S.

Arizona – A New Frontier for Backyard Homes

Bill: HB 2720
Effective: January 1, 2025
Why it matters: For the first time, Arizona cities over 75,000 in population must allow both an attached and detached ADU on single-family lots. No extra parking requirements, no matching exterior rules, and no more needing family to live in your ADU.
What it means: More freedom, fewer hoops, and huge opportunity for Arizona homeowners. arizona adu bill build an adu casita builders

California – The OG of ADU Innovation

Arizona – A New Frontier for Backyard Homes

Bills: AB 2533, SB 1211, SB 1077
Effective: January 1, 2025
Why it matters: California continues leading the way with flexible ADU rules—even allowing up to eight detached units on multi-family lots.
What it means: Whether you’re in LA, the Bay, or beyond, ADUs are a proven path to passive income in tight housing markets. casita builders arizona adu bill build an adu

Colorado – Mountain Views, Modern Rules

Bill: HB 24-1152
Effective: June 30, 2025
Why it matters: In fast-growing metro areas, cities can no longer block reasonable ADU builds with outdated zoning codes.
What it means: Simplified permitting and easier pathways to build in beautiful, in-demand places. casita builders

Massachusetts – A Northeast Come-Up

Law: Affordable Homes Act
Effective: August 2024
Why it matters: ADUs up to 900 sq ft are now allowed by-right—no more begging the zoning board for permission.
What it means: For homeowners and families squeezed by housing costs, this opens real options fast. build an adu arizona adu bill

Vermont – Grants with Green Backing

Program: ADU Grant via VHIP
Why it matters: Grants up to $50,000 for converting or building ADUs make Vermont one of the most financially supportive states.
What it means: Turn that old garage into a cozy rental or in-law suite—with state help. arizona adu bill casita builders

New York – Big Help in the Big Apple (and Beyond)

Program: Plus One ADU
Why it matters: Eligible homeowners can get up to $125,000 in grants to build or legalize an ADU.
What it means: Whether you’re in Brooklyn or Buffalo, this is a game-changer for multigenerational housing and long-term investment. casita builders arizona adu bill

Maine – One of the First to End Single-Family-Only Zoning

Bill: LD 2003
Effective: July 27, 2022
Why it matters: Municipalities must allow at least one ADU per single-family lot.
What it means: You don’t need to live in a big city to benefit from flexible housing anymore. arizona adu bill

Oregon – Early Adopter, Big Rewards

Bill: HB 2001
Effective: 2020
Why it matters: Oregon was the first to make middle housing legal statewide, including ADUs.
What it means: If you’re in Oregon and still sitting on an unused garage or backyard space—this is your sign. arizona adu bill

Washington – Density Done Right

Bill: HB 1110
Effective: May 2023
Why it matters: The state banned single-family zoning in many cities and legalized ADUs across the board.
What it means: The opportunity to develop and house more people sustainably is wide open in the Pacific Northwest. arizona adu bill

Start Building Your Casita Today! casita builders

Start Building Your Casita Today! casita builders

Our Mission

Where ADUs Are Changing the Game Across the U.S.

Arizona – A New Frontier for Backyard Homes

Arizona – A New Frontier for Backyard Homes

California – The OG of ADU Innovation

Arizona – A New Frontier for Backyard Homes

Colorado – Mountain Views, Modern Rules

Massachusetts – A Northeast Come-Up

Vermont – Grants with Green Backing

New York – Big Help in the Big Apple (and Beyond)

Maine – One of the First to End Single-Family-Only Zoning

Oregon – Early Adopter, Big Rewards

Washington – Density Done Right

Washington – Density Done Right

Casita/ADU Blog

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Start Building Your Casita Today! casita builders

Start Building Your Casita Today! casita builders

Our Mission

Where ADUs Are Changing the Game Across the U.S.

Arizona – A New Frontier for Backyard Homes

Arizona – A New Frontier for Backyard Homes

California – The OG of ADU Innovation

Arizona – A New Frontier for Backyard Homes

Colorado – Mountain Views, Modern Rules

Massachusetts – A Northeast Come-Up

Vermont – Grants with Green Backing

New York – Big Help in the Big Apple (and Beyond)

Maine – One of the First to End Single-Family-Only Zoning

Oregon – Early Adopter, Big Rewards

Washington – Density Done Right

Washington – Density Done Right

Casita/ADU Blog

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