Your Calabasas ADU Permitted & Built Under CSLB 757470
Site assessment before any design is drawn — so your permit set reflects the real lot, not a template. ADUs from parcel review through Certificate of Occupancy.
What ADU Construction in Calabasas Actually Involves — Start to Finish
ADU construction in Calabasas is a full permit-through-completion process, not a renovation.
An accessory dwelling unit (ADU) — a fully independent secondary dwelling with its own entrance, kitchen, and bathroom — requires a complete construction document set, LA County plan check review, and a sequence of field inspections before it is legally habitable. That process involves structural engineering, Title 24 energy compliance, and coordination with LA County Building & Safety from submission through final sign-off.
Pure Builders Inc builds ADUs in Calabasas from site assessment through Certificate of Occupancy. CSLB License 757470 covers the full general building contractor scope — every trade, every phase, every inspection type an ADU requires — done by a 30-person crew dispatched from the Craftsman Road office.
The permit pathway is only as clean as the design is site-accurate. A plan set built around actual parcel conditions — slope, easements, utility stub locations, setback measurements — moves through plan check in fewer cycles than one built on generic assumptions.
Licensed by the CSLB under CSLB 757470 — a Class B General Building Contractor license, active & publicly verifiable at cslb.ca.gov.
Building ADUs in Calabasas Since Before AB 2221 Changed the Rules
From the Craftsman Road office, the team reaches project sites throughout the Calabasas hills, Lost Hills corridor, and Las Virgenes Road neighborhoods without extended mobilization — site visits, inspection staging, and subcontractor coordination run from a local dispatch point, not a regional hub.
The company has operated under CSLB License 757470 since 1998, pulling ADU permits in LA County before AB 2221 — California's 2023 law that standardized 4-foot rear and side setbacks and established ministerial approval as the required pathway. Ministerial approval means the county must approve a compliant application without discretionary review: no hearings, no design-committee input — but only for applications compliant on first submission.
Some Calabasas parcels fall under City of Calabasas planning authority; others sit in unincorporated LA County under a different fee schedule and portal. Pure Builders confirms which jurisdiction applies to a specific address before any site analysis begins.
What a Site Assessment Finds Before a Single Plan Is Drawn
I've been on Calabasas parcels where the homeowner had a complete ADU design ready — elevations, floor plan, material selections — before anyone had measured the actual buildable area. It looked good on paper. Then we walked the site.
The rear of the lot dropped about six feet over thirty feet of depth. A recorded drainage easement cut across the back third of the yard. The rear setback plus the easement left a buildable footprint about forty percent smaller than the design assumed — and the utility stubs were on the opposite side of the house. The architect was willing to redesign, but they'd lost eight weeks and several thousand dollars in design fees working from assumptions that didn't match the parcel.
A site assessment prevents that sequence. Before we propose a design direction, we evaluate slope, pull drainage easements from county records, confirm utility stub locations, and measure setbacks against the actual property lines — which also confirms the foundation type the slope and soils will require. — Eli Kaspi, Founder & CEO
How Pure Builders Keeps Your ADU on the Right Permit Path
A complete, reviewer-ready plan set on the first submission is what separates a 60-day plan check from a five-month one. The most important scheduling decision happens before construction starts — when the plan set is prepared.
AB 2221 requires LA County to approve a compliant application within 60 days of a complete submission. "Complete" carries the weight: reviewers flag missing structural calculations, incorrect setback dimensions, a missing Title 24 report, or site-plan dimensions inconsistent with assessor data. Each correction notice restarts the clock and adds six to ten weeks.
Pure Builders prepares plan sets to LA County's unincorporated-area review standards — structural calculations, site-plan dimensions, and the Title 24 report formatted the way reviewers expect. That reduces correction cycles; it doesn't eliminate them, since county review volume and staffing sit outside any contractor's control.
From Parcel Review to Certificate of Occupancy
Every ADU project is structured around site-verified data, not regional defaults. The standards held to on every build:
Phase by Phase — Every Stage Gates the Next
Site Assessment & Due Diligence
Slope, easements, utility stubs, and setbacks documented on the ground — and whether a parallel LA County grading permit is required before building permits issue.
Design & Plan Set
Construction documents, structural and foundation engineering, and the Title 24 report assembled into one complete architectural, structural, and energy set.
Plan Check & Corrections
Submitted to LA County via the EPIC-LA portal. First review runs six to ten weeks; each correction is answered and resubmitted to the review queue.
Permit & Construction
Site prep, foundation, framing, MEP rough-in, insulation, and finishes — each phase passing its field inspection before the next proceeds.
Final & Certificate of Occupancy
After all inspections pass, LA County issues the C of O — the legal document that makes the ADU a permitted, habitable, rentable dwelling.
ADU Construction Across Calabasas, Malibu & the Conejo Valley
From the Craftsman Road office the team reaches ADU sites across three regions without extended mobilization. Both City of Calabasas and unincorporated LA County addresses are served — jurisdiction and permit routing confirmed at the first site visit.
ADU Construction in Calabasas — FAQ
Detached ADU construction in this area typically runs between $250,000 and $450,000 depending on size, foundation type, and site conditions. Hillside lots with grading requirements and long utility trench runs land at the higher end. Pure Builders prices from site-assessed data, not square-footage averages.
Most detached ADU projects in unincorporated LA County take 9 to 18 months from contract to Certificate of Occupancy. Plan-set preparation runs 4 to 8 weeks, LA County plan check 6 to 10 weeks on a clean first submission, and construction 10 to 20 weeks depending on type and site complexity.
Slope and easements directly reduce your buildable footprint. We measure setbacks against actual property lines and pull county records for easements before any design is drawn. That real buildable area is usually smaller than a topographic map suggests, and skipping the step frequently forces redesigns after the first grading consultation.
A square-footage rate ignores foundation type, utility trench distance, grading permit triggers, and easement constraints — variables that shift cost significantly. The site assessment produces the parcel-specific data that makes an accurate estimate possible; quoting before the visit produces a number that changes after the first structural review.
Yes, and it matters. City of Calabasas parcels are permitted through the city planning department; unincorporated LA County parcels use LA County Building & Safety and the EPIC-LA portal. Fee schedules, timelines, and requirements differ, so we confirm classification at the site assessment before any permit documents are prepared.
Ministerial approval means LA County must approve a compliant application within 60 days, with no hearings or design-committee input. Discretionary review involves public notice and a planning-commission hearing. Under AB 2221 most standard Calabasas ADUs qualify for the ministerial pathway — but only if the plan set is compliant on first submission.
The First Step Is a Site Visit — Not a Phone Estimate
Call or email to schedule a site assessment. Have your property address ready; prior permit records, a survey, or a preliminary description accelerate the conversation. No drawings are required to start.