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Neighborhood Workshop

@nbrhoodwrkshop

Principal at Neighborhood Workshop & Faculty with the Incremental Development Alliance. Coined and popularized the term ACU - Accessory Commercial Unit. ACUs keep it local and make it walkable.

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03.10.2024
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Latest posts by Neighborhood Workshop @nbrhoodwrkshop

I welcome any feedback

18.11.2025 02:58 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

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Specifically: a neighborhood serving commercial use that is subordinate to a residential principal use and occupies no more than 10 percent of the floor area of the story on which it is located, in accordance with IBC Section 508.2 (Accessory Occupancy).

18.11.2025 02:57 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

5/6

In buildings with 5 to 20 dwelling units, an ACU is limited to internal or attached locations and must meet the definition of accessory occupancy per the International Building Code.

18.11.2025 02:57 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

4/6

This threshold aligns with FHA residential loan standards for 1 to 4 unit properties that include non residential space. ACUs in this category are typically not home based businesses but are distinct, dedicated commercial spaces.

18.11.2025 02:56 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

3/6

In buildings with 1 to 4 dwelling units, an ACU may be internal, attached, or detached, and is limited to no more than 49 percent of the total gross floor area of the building.

18.11.2025 02:56 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

2/6

Definition: Accessory Commercial Unit (ACU)
An Accessory Commercial Unit (ACU) is a low intensity commercial use that is subordinate to a residential principal use, designed to support small scale, local economic activity.

18.11.2025 02:55 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

1/6

If cities want more neighborhood scale commerce without rezoning whole corridors, ACUs (accessory commercial units) are the cleanest path forward. I provide a working definition below.

18.11.2025 02:54 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
Preview
Affordable townhomes bring first-time home buyers to β€˜Portland’s great neighborhoods’ The new multi-family housing wasn’t legal until recently.

Thrilled to see the built results of my modeling policy efforts from years back. I modeled an affordability bonus for the City of Portland’ low-density zones that allowed up to six units of some were affordable. At the time it was the most liberalized low-density policy in the country.

13.01.2025 18:02 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Preview
How Minimum Lot Size Requirements Maximize the Housing Crisis Allowing housing units to be built on small or irregular lots is a gamechanger for cities that are fighting the housing crisis. Here’s why that allowance is so important and how three developers are u...

I had fun showcasing my developer friends’ projects while discussing the impacts of zoning correctives here in Portland.

www.strongtowns.org/journal/2024...

10.12.2024 20:44 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Thank you. Super helpful.

01.12.2024 17:49 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Sorry to hear. But it looks like she got to go on some great adventures. My redbone pulled on the leash the exact same way. A familiar sight!

28.11.2024 00:24 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Is that Redbone you got with you?

27.11.2024 16:02 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

This location is called Toroweap. Accesible by a 40+ mile dirt road. No crowds.

23.11.2024 20:52 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Sure, though I also like testing my Spanish language abilities.

22.11.2024 05:02 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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First post:
I post a lot about ACUs - Accessory Commercial Units. Small neighborhood serving retail buildings in front of residential buildings.

ACUs keep it local and make it walkable. If you see one in your town, send me a photo and location.

19.11.2024 06:27 πŸ‘ 9 πŸ” 3 πŸ’¬ 1 πŸ“Œ 0
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Yes, we’ve been calling them ACUs - Accessory Commercial Units. I’ve been consulting on how to bring them back.

18.11.2024 22:28 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0