ADU Builder · Los Angeles County

ADU Builder in San Dimas, California

Custom-built ADUs for San Dimas — from Via Verde hillsides to the canyon's equestrian lots, built by a team based just minutes east in Upland.

4.9 · 26 Google reviews
  • All-in pricing
  • Permits handled
  • Design & build in-house
ADU built by Backyard Estates in San Dimas, CaliforniaBuilt in San Dimas
0ADUs built in San Dimas
  • 0+across Los Angeles County
  • 0+completed since 2020

Real local proof

ADUs we’ve built in & around San Dimas

40+ completed ADUs across Los Angeles County — including projects near San Dimas. Tap any for its floor plan, finishes, and timeline.

Loved by neighbors

What San Dimas homeowners say

Juan

The best part was being able to sleep well at night, knowing I chose the right team.

JuanHomeowner · Los Angeles County

Watch their full story

The opportunity

What an ADU returns in San Dimas

Turn underused backyard into monthly income and lasting value.

Estimated monthly rent

$0$0

per month, in San Dimas

Typical value added

$0k$0k

added to your property

No hassle, just cash flow — we handle the design, permits, and construction end to end, so your San Dimas backyard starts paying you back.

Estimates only — your exact rent, value, and price come from a free property analysis.

Your next step

See what’s possible at your San Dimas address

Drop in your address and we’ll show you which ADUs fit your lot, what they’d cost all-in, and what they could earn — no pressure, no obligation.

  • Free, no-obligation
  • Specific to your San Dimas parcel
Prefer to talk? Call (909) 500-0917
Timeline · San Dimas

8.2months to a finished ADU.

The San Dimas industry average is 26.1 months — we’re about faster.

Backyard Estates8.2 mo245 days
Industry average26.1 mo782 days
PermitsConstruction

The biggest gap is construction — the industry averages 374 days; we clear it in 50.

Permits & fees

Red tape in San Dimas, handled

Permitting an ADU touches a dozen departments and a stack of fees. We run every one — and it’s already in your fixed, all-in price.

Reviewed by the City of San Dimas Planning Division

What California’s statewide ADU law means for your San Dimas property:

  • California law requires ministerial (no-discretionary-hearing) review of a complete ADU application within 60 days, so a clean submittal moves quickly through the Planning Division.
  • A detached ADU of up to 800 sq ft with 4-foot side and rear setbacks is allowed by right; most lots can support a larger unit up to 1,200 sq ft depending on configuration.
  • No additional off-street parking can be required for an ADU located within a half-mile walking distance of public transit.
  • State law removes owner-occupancy requirements for ADUs permitted through 2025, and a building permit for the structure is handled by the city's Building & Safety Division.

Every city fee — already in your price

No surprise municipal bills. We absorb every San Dimas permit and city fee into one fixed, all-in price.

  • Permit & plan-check fees
  • School district fees
  • Utility hookups
  • Fire & public works
  • We run all ~11 city & county departments — plan check, building, fire, public works, utilities, and school fees.
  • Our Formal Property Analysis verifies 0+ property & city items — fire sprinklers, school & plan-check fees, lot coverage, Title 24 — before we build.

Specific setbacks, fees, and overlay rules are confirmed for your exact parcel during your free Formal Property Analysis.

Local know-how

Why homeowners build in San Dimas

San Dimas wears its history on its sleeve. The Western-themed storefronts and wooden sidewalks downtown are a nod to the city's roots as cattle and sheep ranch country, and that small-town, foothill character still shapes how the place is built today. For homeowners here, that translates into something valuable for an ADU project: generous lots, mature landscaping, and the kind of backyard space that lets a detached granny flat or guest house sit comfortably without crowding the main home. Backyard Estates is headquartered just a few miles east in Upland, so San Dimas is practically our backyard — we know the foothill grades, the soils, and the rhythm of building along the 210 corridor.

The neighborhoods each call for a slightly different approach. Up in San Dimas Canyon and the equestrian zones, lots are large and sloped, and we design around grading, drainage, and existing trails so a casita feels like it always belonged. In Via Verde, the curving hillside streets and view lots reward thoughtful placement and rooflines that protect sightlines. Around downtown, Mountain Meadows, and the Bonita Canyon area, flatter parcels make detached units and garage conversions especially straightforward. Whatever the setting, we handle the design, engineering, permitting, and construction as one accountable team.

Demand for ADUs here is driven by real local needs, not trends. Multigenerational families want aging parents close but independent; homeowners near the Metro Gold Line extension and the 210/57 interchange see strong rental interest; and with the University of La Verne and Cal Poly Pomona nearby, there's steady appetite for well-built rental space. The city has openly embraced ADUs as part of its housing strategy, recognizing they offer attainable options for seniors, students, and family. We build to that opportunity with units engineered for the long haul — and a process designed to keep you informed at every step.

Building throughout San Dimas

Via VerdeSan Dimas CanyonDowntown (Old Town)Mountain MeadowsBonita Canyon Gateway

Good to know

San Dimas ADU questions, answered

Most San Dimas projects land in the low-to-mid six figures depending on size, finishes, and site conditions — canyon and hillside lots in areas like San Dimas Canyon or Via Verde can add grading, drainage, and foundation work, while flatter parcels near downtown tend to be more predictable. We provide a fixed, itemized proposal after a site visit so there are no surprises.

The City of San Dimas Planning Division reviews ADU applications for zoning and development standards, and the Building & Safety Division issues the construction permit. Under state law a complete application gets a ministerial decision within 60 days, and we manage the full submittal on your behalf.

Yes. ADUs are popular here for long-term rentals given proximity to the University of La Verne, Cal Poly Pomona, and the 210/57 commute corridor, as well as for housing family members. State law also bars owner-occupancy requirements for ADUs permitted through 2025, giving you flexibility in how you use the unit.

Keep exploring

Nearby areas we build in

Get Started

Build your ADU in San Dimas

Drop in your address and we'll show you what's possible on your lot, what it costs all-in, and what it could earn — no pressure.

See what’s possible