Room Addition Contractor in Northridge CA — Costs & Planning (2026)

Room Addition Contractor in Northridge, CA — Costs and Planning (2026)

Northridge room additions are one of the most cost-effective ways to add square footage to a Valley home. With large lots (typical 6,500–10,000 sq ft) and flat grade throughout most of the neighborhood, single-story additions are straightforward construction — no hillside premiums, no complex grading. Adding a master suite, family room, home office, or extra bedroom in Northridge typically costs $80,000–$205,000 and adds significant resale value to $700K–$1.1M properties. APLA Construction (CA Lic #1136359) designs and builds room additions throughout Northridge.

Room Addition Costs in Northridge (2026)

• Bedroom addition (200–300 sq ft): $65,000–$110,000
• Master suite addition (400–600 sq ft): $90,000–$165,000
• Family room expansion (400–600 sq ft): $80,000–$145,000
• Home office addition (200–300 sq ft): $58,000–$95,000
• Full ground-floor addition (600–900 sq ft): $140,000–$220,000

The Northridge Room Addition Process

Step 1 — Design and Planning ($3,500–$8,000)

Architectural drawings, structural engineering, and LADBS plan check submission. Northridge room additions use LADBS standard plan check — 6–10 week timeline for permit approval.

Step 2 — Foundation and Framing ($18,000–$42,000)

New foundation (slab or raised), framing to match existing home structure. Northridge flat lots are excellent for room additions — no hillside surcharges, standard concrete work.

Step 3 — MEP Rough-In ($12,000–$28,000)

Electrical, plumbing (for suite additions), and HVAC extension into the new space.

Step 4 — Insulation, Drywall, Finishes ($18,000–$45,000)

Insulation to Title 24 energy standards, drywall, paint, flooring, and trim to match or complement existing home finishes.

Frequently Asked Questions — Room Addition Northridge

How much does a room addition cost in Northridge in 2026?

Bedroom addition: $65,000–$110,000. Master suite: $90,000–$165,000. Family room: $80,000–$145,000. Northridge room addition costs are among the Valley’s most accessible — flat lots, standard soil conditions, no hillside premiums.

How long does a room addition take in Northridge?

Plan check and permit: 8–12 weeks. Construction: 10–16 weeks. Total project timeline from design through occupancy: 5–8 months. APLA manages the full process including permit drawings.

Does APLA build room additions in Northridge?

Yes. APLA (CA Lic #1136359) serves Northridge, Reseda, Chatsworth, and the north/west Valley. Call (818) 818-4419 for a free room addition consultation.

Start Your Northridge Room Addition

Call: (818) 818-4419
Email: info@aplaconstruction.com
CA General Contractor License #1136359

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