6 Zoning Keys for Effective Missing Middle Housing

The inventor of the term missing middle housing has advice on writing zoning codes that effectively deliver on the potential of the tool.

1 minute read

March 23, 2020, 11:00 AM PDT

By James Brasuell @CasualBrasuell


Accessory Dwelling Unit

Sightline Institute: Missing Middle Homes Photo Library Follow / Flickr

According to a February article by Dan Parolek, recent legislative efforts to legalize missing middle housing (e.g., the Minneapolis 2040 Comprehensive Plan and Oregon’s HB 2001) illustrate how “Missing Middle Housing can go a long way toward meeting housing needs in a variety of places.”

Parolek, credited with coining the term missing middle housing, writes here to offer a few tips to ensure that zoning changes designed to make new space fo missing middle housing will achieve the desired goals of increasing the number of housing units, addressing the high cost of housing, and not letting that new density also mean huge new buildings.

Parolek lists six tips in total, listed here, but also with a lot more detail in the source article.

  1. Regulate maximum building envelope/form & scale rather than number of units/density
  2. Carefully regulate building width and depth
  3. Be careful about allowed height
  4. Do not allow townhouses or single-family detached homes in which the ground floor is mostly parking
  5. Some single-family contexts are better than others for Missing Middle Housing 
  6. Communication and framing tips

Tuesday, February 25, 2020 in CNU Public Square

portrait of professional woman

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching. Mary G., Urban Planner

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching.

Mary G., Urban Planner

Use Code 25for25 at checkout for 25% off an annual plan!

Logo for Planetizen Federal Action Tracker with black and white image of U.S. Capitol with water ripple overlay.

Planetizen Federal Action Tracker

A weekly monitor of how Trump’s orders and actions are impacting planners and planning in America.

June 4, 2025 - Diana Ionescu

White and yellow DART light rail train in Dallas, Texas with brick building in background.

DARTSpace Platform Streamlines Dallas TOD Application Process

The Dallas transit agency hopes a shorter permitting timeline will boost transit-oriented development around rail stations.

May 28, 2025 - Mass Transit

Metrorail train pulling into newly opened subterranean station in Washington, D.C. with crowd on platform taking photos.

Congressman Proposes Bill to Rename DC Metro “Trump Train”

The Make Autorail Great Again Act would withhold federal funding to the system until the Washington Metropolitan Area Transit Authority (WMATA), rebrands as the Washington Metropolitan Authority for Greater Access (WMAGA).

June 2, 2025 - The Hill

Worker in hard hat stands in front of oil pipeline under construction with yellow heavy equipment.

Supreme Court Ruling in Pipeline Case Guts Federal Environmental Law

The decision limits the scope of a federal law that mandates extensive environmental impact reviews of energy, infrastructure, and transportation projects.

June 5 - NPR

White, yellow, and blue Dallas Streetcar at station in downtown Dallas, Texas.

Texas State Bills to Defund Dallas Transit Die

DART would have seen a 30% service cut, $230M annual losses had the bills survived.

June 5 - Plano Star Courier

Collage of three photos of Team England cricket players taking green Lime bike share bikes to a game.

Bikeshare for the Win: Team Pedals to London Cricket Match, Beats Rivals Stuck in Traffic

While their opponents sat in gridlock, England's national cricket team hopped Lime bikes, riding to a 3-0 victory.

June 5 - The Straits Times

Urban Design for Planners 1: Software Tools

This six-course series explores essential urban design concepts using open source software and equips planners with the tools they need to participate fully in the urban design process.

Planning for Universal Design

Learn the tools for implementing Universal Design in planning regulations.