Pricing depends on the square footage, whether you are building a detached backyard cottage or converting an existing garage, and the interior finishes you choose. As a general guide for the Los Angeles area:

• Garage conversion or Junior ADU (JADU): roughly $90,000 to $150,000
• Detached custom ADU (500 to 800 sq ft): roughly $180,000 to $260,000
• Larger detached luxury ADU (800 to 1,200+ sq ft): $280,000 to $350,000+

Site prep for hillside properties, trenching long utility lines, or foundation upgrades can influence final costs. We provide a written, itemized estimate after your free in-home consultation so there are no vague allowances or surprise line items later.

Most detached ADU construction takes three to five months of active on-site work. Garage conversions can often be completed slightly faster, typically within two to four months.

• Architectural design, structural engineering, title-24 energy calculations, and city permit approval take place before breaking ground and typically add two to four months
• Custom elements like cabinetry, specialized roofing, and window packages require lead times, so we order them early
• You receive a clear written schedule at the start and regular updates throughout the build

We streamline every phase to ensure your project moves forward smoothly without unnecessary delays.

Yes. KN Remodeling is a licensed Class B general contractor in California with more than 30 years of building experience. We carry full general liability and workers' compensation insurance on every project.

• Your project is managed from concept to completion by a dedicated project manager
• Structural framing, electrical panels, and plumbing connections are performed by licensed professionals and signed off by city inspectors
• You work with a reliable, consistent construction crew rather than a revolving door of subcontractors
• All structural and construction work is backed by our written warranty

Yes, building permits are strictly required for all new ADU construction and legal conversions. West Hills is part of the City of Los Angeles, and plans are submitted through the LA Department of Building and Safety (LADBS) Development Services Center at 6262 Van Nuys Blvd in Van Nuys.

• Permits ensure your structure complies with local height limits, setbacks, and fire safety codes
• The City of Los Angeles' protected-tree regulations may apply if the property has mature oak or other protected trees
• West Hills' larger equestrian-zoned lots near Valley Circle Boulevard may need a well or septic capacity review in addition to standard sewer connections

We handle all architectural filings, engineering reports, city reviews, and mandatory inspections so you don't have to navigate city bureaucracy on your own.

West Hills combines some of the largest residential lots in the San Fernando Valley with equestrian-zoned streets near Valley Circle Boulevard, so site planning varies block by block:

• Large & Equestrian Lots: Some properties keep horses or rely on well water, which affects utility and site planning
• Hillside Edges: Parcels bordering the Simi Hills may need a grading review
• Utility Connections: Determining whether to tie into the main house sub-panel or add a separate meter through LADWP
• HOA Guidelines: Several West Hills communities enforce architectural review separate from city code

We evaluate all of these site-specific conditions during your free initial consultation.