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Terravoir's avatar

I’m from California living in London now and been saying would love to see ADU law implemented here!

The state basically forced cities to allow ADUs by right on single-family lots (R-1 / RD-1.5 etc.). Once SB 1069, AB 68 / AB 881, and SB 13 came in, every lot could add at least one ADU (and often a JADU), with basically over the counter plan check, relaxed setbacks, parking waivers near transit, and guaranteed minimum sizes (e.g. up to ~800 sq ft even if local rules said otherwise).

What happened next was interesting. As soon as ADU sizes increased and approvals became predictable, people started converting garages, carports, and tuck-unders at scale. Those projects suddenly pencilled, which meant owners were willing to put real capex into buildings that had been neglected for decades.

A side effect people don’t talk about enough: a lot of those tuck-under conversions triggered soft-story seismic retrofits. In places like LA and the Bay Area, buildings that were too expensive to retrofit before suddenly became worth fixing because there was rental income on the other side. Neighbourhoods didn’t just get denser — they got nicer looking and safer.

Hilary Porteus's avatar

Thank you for an interesting article. It’s high time that way have a proper, functional, planning framework across England. There is a huge demand for small housing units on properties which can be rented out at affordable rents saying railway stations as development nodes makes a lot of sense, even though there will be difficulties in that. Brownfield sites which are safe to build on should be made available for non-executive Property builds. As someone who lives in a rural area, has there been any discussion to will allow building properties upon the greenbelt?

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