I have a new essay in City Journal that looks at Daniel Parolek’s Missing Middle Housing — and the case for both land use and financing policies that encourage builders to develop more midsized housing options in growing regions. The bottom line: traditionally, homeowners could develop additional units as neighborhood markets signaled demand through rising prices. As this demand was met, prices would trend toward an equilibrium — with the smaller units being most affordable.
Today, land use policies often prevent or limit these kinds of resourceful adaptations by owners — and subject any proposed changes to the gauntlet of local politics, where those who oppose any change often have a deep advantage. (Note how even the legal concept of ‘spot zoning’ militates against boards allowing incremental change, by deeming it facially illegitimate to change the rules for a single property outside the comprehensive planning process — even though such gradual adaptation in response to opportunities is how cities have historically grown.) One result, in the aggregate, has been a widespread shortage of affordable housing in growing regions.
Excellent research and analysis. The author provides an in-depth study of the traditional rules and urban forms that shaped urban growth in the Islamic west (i.e., the Maghreb and Andalucía). Much of what he uncovers and writes about (including treatises by medieval jurists and observations of repeating patterns) adds significant depth to the conventional present-day, Western understanding of urban genesis.
The author’s primary case study is the old city of Tunis, which sits near the Mediterranean coast, close to the site of ancient Carthage. For more than a thousand years, Tunis grew according to a bundle of simple and flexible traditions. The author’s maps and diagrams illuminate these visually — and an accompanying narrative provides context and explanation. Topics range from the small (e.g., party walls, windows, houses, and cul-de-sacs) to the large (e.g., marketplaces, religious sites, defensive walls, and citywide patterns).
Many unique elements of Islamic and Mediterranean urbanism (e.g., covered markets, privacy measures shaped by religious traditions, and arcades over public streets) are treated carefully. Citations to the Quran and Hadith illuminate the cultural aspects of the Islamic components (or justifications) of the urban form. (A later book by the same author, Mediterranean Urbanism, traces a variety of similar urban phenomena from ancient times down through the Byzantine Empire to the building practices of Christian Europe.)
This is a valuable piece of scholarship that is focused on the traditional, sustainable building patterns of vernacular urbanism. Urban planners, lawyers, builders, and architects should read this (as well as Hakim’s Mediterranean Urbanism) for a deeper understanding of how towns and cities were traditionally formed. Highly recommended for anyone with an interest in urbanism, history, property law, or the dynamic between customs and the built environment.
I’m gradually making progress on an essay that I think will be of interest to general readers, that will examine some of this history, including what Hakim has uncovered. In the meantime, I highly recommend Hakim’s work to readers with an interest in the nuts and bolts of more traditional approaches to urban growth. His writing is incredibly interesting, well researched and documented, and relevant to the challenges towns and cities face today.