Cost ranges by project type
Kitchen Remodel
$35K–$85K+Cosmetic refresh $15K–$30K; mid-range $35K–$55K; full gut $55K–$85K+. Most Simi Valley homeowners pick mid-range: new semi-custom cabinets, quartz counters, tile backsplash, new appliances.
Bathroom Remodel
$20K–$48K+Secondary bath refresh $12K–$20K; mid-range bathroom $20K–$35K; full master bath with walk-in tile shower, double vanity, custom tile $40K–$55K+. ADA upgrades add $2K–$6K.
ADU Construction
$90K–$340KJunior ADU (within existing home) $60K–$100K; garage conversion $90K–$150K; attached ADU $150K–$240K; detached ADU $225K–$340K+.
Whole-Home Renovation
$150K–$385K+Partial ($145K–$200K): kitchen + 2 baths + flooring + paint. Full ($200K–$385K+): all systems, structural, exterior.
Room Addition
$60K–$220K+Bedroom $60K–$110K; family room $85K–$160K; in-law suite $115K–$215K; second-story add $155K–$365K+.
Simi Valley-specific cost drivers
Standard Ventura County pricing. City of Simi Valley permit review is efficient — typically 3–5 weeks when required.
Cabinets (30–40% of budget). Stock $9K–$15K, semi-custom $15K–$25K, full custom $30K–$50K+. Cabinet material is the biggest single cost swing in a kitchen remodel.
Countertops (10–15%). Quartz $70–$120/sf installed. Natural stone $80–$200/sf. Waterfall edges add $600–$1,200 per side.
Layout changes. Moving plumbing $2,000–$5,000. Wall removal (structural beam) $6,000–$15,000. Older Simi Valley homes sometimes hide galvanized plumbing or aluminum wiring — add $3,000–$10,000 if found.
Permits — we handle them. Simi Valley Building Division handles all permit review in-house. Permit coordination is included in every contract.
Why national calculators miss Simi Valley
National calculators (Homewyse, Modernize) apply a zip-code multiplier to national averages. That works if you live in the middle of the country. It fails in California where labor, material, and permit costs skew meaningfully higher. National calculators typically undershoot Simi Valley numbers by 15–25%.