Chatsworth’s large lots — including horse properties with 10,000–20,000+ sq ft lots — provide exceptional room addition potential. With flat terrain throughout most of the neighborhood, single-story room additions proceed without hillside construction premiums. Home values of $700K–$1.1M support addition investment, and many Chatsworth homeowners are adding master suites, family rooms, and dedicated home offices to properties they plan to retain long-term. APLA Construction (CA Lic #1136359) builds room additions throughout Chatsworth.
| Item | Typical Cost |
| Bedroom addition (200–300 sq ft) | $60,000–$105,000 |
| Master suite addition (400–600 sq ft) | $82,000–$155,000 |
| Family room expansion (400–600 sq ft) | $72,000–$142,000 |
| Home office addition (200–300 sq ft) | $55,000–$92,000 |
| Large addition (800–1,200 sq ft on horse property) | $155,000–$265,000 |
Master suite: $82,000–$155,000. Family room: $72,000–$142,000. Bedroom: $60,000–$105,000. Chatsworth is affordable west Valley pricing — flat lots, large properties, no hillside complexity.
Yes, subject to lot coverage limits and setback requirements. LADBS regulates additions in Chatsworth (City of LA). Large Chatsworth parcels typically have ample room for additions while meeting setback requirements. APLA will assess your specific parcel.
Yes. APLA (CA Lic #1136359) serves Chatsworth, West Hills, Canoga Park, Granada Hills, and the west Valley. Call (818) 818-4419 for a free estimate.
Call: (818) 818-4419
Email: info@aplaconstruction.com
CA General Contractor License #1136359 — verify on CSLB
Room Addition Contractor Los Angeles | General Contractor Chatsworth | ADU Contractor Chatsworth