Tarzana room additions have a distinctive advantage over most LA neighborhoods: large lots. Tarzana homes typically sit on 7,500–20,000 sq ft lots — considerably more land than most of Los Angeles. This means horizontal room additions (adding out rather than up) are frequently viable without pushing against lot coverage limits, and primary suite additions with genuine square footage are achievable at costs below hillside or Coastal Zone markets. Home values of $900K–$2.5M make room additions a high-ROI investment in Tarzana, particularly for primary suite and bedroom count improvements. APLA Construction (CA Lic #1136359) handles room additions throughout Tarzana, managing LADBS permits and all construction.
What you get: Single bedroom addition, 150–250 sq ft. Foundation, framing, roofline, full MEP, insulation, drywall, and finishes. LADBS plan check included. At Tarzana home values of $900K–$1.5M, a bedroom count improvement adds $65K–$115K in market value — a strong ROI for the Valley market.
What you get: Primary bedroom (180–280 sq ft) with attached primary bathroom (walk-in shower, heated floor, double vanity) and walk-in closet. Finishes at Tarzana’s mid-tier quality standard. Tarzana’s large lots make ground-floor primary suite additions particularly straightforward, avoiding the structural complexity and cost of second-story expansion. A primary suite addition converts a typical Tarzana 3-bed/2-bath configuration to a 4-bed/3-bath with full primary suite — a significant market positioning improvement.
What you get: Primary suite plus additional bedroom or family room expansion. 700–1,100 sq ft of new living space at Tarzana’s mid-to-premium quality tier. Tarzana lots support this scope cleanly given the available lot coverage. LADBS structural plan check: 7–12 weeks for multi-room additions.
What you get: Full second story above an existing Tarzana single-story home. Second story additions are more common in higher-density areas, but some Tarzana homeowners prefer vertical expansion to preserve backyard space on large lots. Approximately doubles living square footage.
Tarzana is in the City of Los Angeles — all permits go through LADBS (West Valley district office). Most Tarzana properties are flat, removing hillside engineering complexity. LADBS plan check for room additions: 7–12 weeks. APLA manages all LADBS Tarzana permit submissions and inspections.
Bedroom only: $68,000–$122,000. Primary suite: $138,000–$245,000. Multi-room addition: $238,000–$395,000. Second story: $285,000–$495,000+. Tarzana costs are comparable to Encino and Woodland Hills — mid-tier San Fernando Valley, above Canoga Park, below Sherman Oaks and Studio City for equivalent scopes.
Bedroom only: 3.5–6.5 months. Primary suite: 5–9 months. Multi-room: 7–12 months. Second story: 9–16 months. LADBS plan check: 7–12 weeks for structural additions.
Yes. APLA (CA Lic #1136359) handles room additions throughout Tarzana. Call (818) 818-4419 for a free in-home estimate.
Call: (818) 818-4419
Email: info@aplaconstruction.com
CA General Contractor License #1136359
General Contractor Tarzana | Room Addition Tarzana | Room Addition Los Angeles