# The Urban Form Standard **Rediscovering the Dimensions of Good Urbanism** For centuries, great neighborhoods in small towns and world capitals alike have shared a dimensional DNA: the block sizes, street widths, and alleys that make places walkable, adaptable, and economically sustainable. This book measures that DNA and distills it into four rules. ## What You'll Discover Drawing from more than a hundred neighborhoods, from the American Planning Association's **_Great Places in America_** to exemplary cities abroad, we found surprisingly consistent patterns beneath successful urbanism. They hold across cultures, climates, and centuries. We've analyzed thousands of blocks, streets, and lots to bring you: - **The Four Essential Rules** of urban form that lay the foundation for a neighborhood's future success - **Master Street Plans**: The most powerful (and most neglected) tool in city planning - **Deep Time Design**: Why boundary lines matter more than buildings - **The Mathematics of Adaptability**: How highly composite numbers create flexible cities - **Real-World Applications**: From greenfield development to urban infill ## Why This Matters Now We're building cities faster than ever before and getting it wrong at unprecedented scales. Ancient Roman street grids still work after 2,000 years, while many post-WWII developments are already failing after just 70. The difference lies in the permanent framework of cities: the streets, blocks, and lots that outlive buildings, businesses, and even civilizations. ## Who This Is For - **City Planners & Urban Designers** seeking evidence-based design standards - **Developers & Architects** who want to build and design places that last - **Public Officials** making decisions about their community's future - **Citizens** working to improve their neighborhoods Ready to discover what makes great places great? **Start with [[Chapter 1 - The Permanent Framework]] →** *** ### About This Project > **Work in Progress**: Chapters 1–7 are available now. Chapters 8–10, on applying the rules to new and existing places, are in development. Existing content may be revised based on ongoing research and reader feedback. _The Urban Form Standard_ began at the Doug Allen Institute as an effort to quantify what makes cities work. By studying the physical dimensions of the world's best neighborhoods, we've created a practical guide for laying a strong foundation for new development. [[About the Author]] | [[Bibliography]] | [Urban Form Atlas](https://dougalleninstitute.org/the-urban-form-atlas/) _The Urban Form Standard is licensed under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/)_