ADU / accessory dwelling in Langstrasse
Langstrasse is Stadt Zürich — Kreis 4's wilhelminische mietshäuser 1880-1905 submarket. Langstrasse falls under Lärmschutzverordnung Empfindlichkeitsstufe IV — the most permissive Aussenlärm-Stufe in Zurich — but interior Lärmgrenzwerte still apply, so any kitchen extraction or HVAC project needs a Schalltechnischer Nachweis SIA 181 to clear the AfB review.
What a adu / accessory dwelling project looks like here
Langstrasse falls under Lärmschutzverordnung Empfindlichkeitsstufe IV — the most permissive Aussenlärm-Stufe in Zurich — but interior Lärmgrenzwerte still apply, so any kitchen extraction or HVAC project needs a Schalltechnischer Nachweis SIA 181 to clear the AfB review.
The Stadt Zürich Bauordnung pegs the Langstrasse cohort at Zentrumszone Z6 with mandatory Mischnutzung — owners cannot convert ground-floor commercial to residential, and the Mehrwertabgabe on any Aufzonung claws back 40% of the planning gain to the city Stadtkasse.
Zurich ADUs — detached, attached, and conversion paths — scoped against Hochbauamt Zurich + SIA 380/1 + KBOB setback + height + parking variances. In Langstrasse specifically, wilhelminische mietshäuser 1880-1905 stock means adu / accessory dwelling scope is shaped by the neighborhood's dominant construction typology. Baily's Zurich scoping flow factors lärmschutzverordnung empfindlichkeitsstufe iv and stadt zürich bauordnung zentrumszone z6 into the estimate before a contractor is involved.
Start your Langstrasse scope — Baily asks the right questions.
Pre-seeded for adu / accessory dwelling in Langstrasse. Mention your 45-95 m², your timeline, and any known constraints — Baily factors the stadt zürich — amt für baubewilligungen (afb) review queue into the scope.
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Who is Baily?
Baily is named after Francis Baily — an English stockbroker who retired at 51, became an astronomer, and in 1836 described something on the edge of a solar eclipse that nobody had properly articulated before: a string of bright beads of sunlight breaking through the valleys along the moon’s rim.
He wasn’t the first to see them. Edmond Halley saw them in 1715 and barely noticed. Baily’s contribution was clarity — describing exactly what was happening, in plain language, so vividly that the whole field of astronomy paid attention. The phenomenon is still called Baily’s beads.
That’s what we wanted our AI to do. Every inbound call and text has signal in it — a homeowner’s real question, a timeline, a budget, a hesitation that means “yes but.” Baily listens to every one, 24/7, and finds the beads of light.
Baily was a businessman before he was a scientist. That’s our vibe too.
Questions LA homeowners actually ask
Langstrasse adu / accessory dwelling projects typically run $255K–$750K. Langstrasse's wilhelminische mietshäuser 1880-1905 stock, combined with lärmschutzverordnung empfindlichkeitsstufe iv — langstrasse-korridor, puts most mid-complexity projects in the $503K range. Baily scopes the exact band once you describe the work.
Nearest neighborhoods
Same service, adjacent Zurich submarkets.