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ADU / DADU in Highlands Ranch

Highlands Ranch is Highlands Ranch's 1981-2010 master-planned tract (largest single master-plan in colorado) + post-2010 luxury custom submarket. Highlands Ranch is unincorporated Douglas County — the largest single master-planned development in Colorado (22,000 acres, 100K population) developed 1981-2010 by Mission Viejo Company + successor Shea Homes.

Highlands Ranch cost range
$195K$985K
typical mid-complexity
Permit authority
Douglas County (Highlands Ranch is unincorporated)
12-22 weeks (Douglas County Building)
Typical home size
2,200-5,200 sqft; 0.14-0.40 acre lots
Borough · ZIP
Highlands Ranch
80129
Highlands Ranch Community Association (RHCA) — 100-page architectural standards manualDouglas County NO state contractor license — county GC license requiredHighlands Ranch Backcountry Wilderness Area buffer — south-edge parcels2024 IECC + Douglas County amendmentsPierre shale + expansive-soils report on basement scope

What a adu / dadu project looks like here

Highlands Ranch is unincorporated Douglas County — the largest single master-planned development in Colorado (22,000 acres, 100K population) developed 1981-2010 by Mission Viejo Company + successor Shea Homes.

The Highlands Ranch Community Association (RHCA) maintains a 100-page architectural standards manual that governs every exterior change — paint color, fence material, roof type — adds 30-60 day RHCA review on remodels.

Because Highlands Ranch is unincorporated DougCo, permits go to Douglas County rather than a city building office — review patterns + standards differ from the surrounding incorporated cities.

Denver Zoning Code permits ADUs by-right in most residential zones; permitting through Denver CPD with a 35 ft height + FAR cap and a soils report on basement-level units. In Highlands Ranch specifically, 1981-2010 master-planned tract (largest single master-plan in colorado) + post-2010 luxury custom stock means adu / dadu scope is shaped by the neighborhood's dominant construction typology. Baily's Denver scoping flow factors highlands ranch community association (rhca) and douglas county no state contractor license into the estimate before a contractor is involved.

Start your Highlands Ranch scope — Baily asks the right questions.

Pre-seeded for adu / dadu in Highlands Ranch. Mention your 2,200-5,200 sqft, your timeline, and any known constraints — Baily factors the douglas county (highlands ranch is unincorporated) review queue into the scope.

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Origin

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

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