Second Story Addition Contractors in San Diego
Add a full or partial second story to your San Diego home. We handle structural engineering, design, permits, and construction — with transparent pricing and a 2-year craftsmanship warranty.
Second Story Additions That Solves Your Problem
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What It Costs and Why
Partial Second Story
$150K – $220K
Full Second Story
$220K – $350K+
Timeline
4 – 6 Months
Top Cost Drivers
- •Full vs. partial second story footprint
- •Foundation and shear wall reinforcement
- •Structural engineering complexity
- •Roofline integration and reconstruction
- •Number of bathrooms added
- •Finish level and materials
How It Works
A straightforward process designed around transparency and zero surprises.
Free Consultation
We visit your home, listen to your goals, assess the space, and discuss budget. No pressure, no obligation.
Design & Plan
We create a design with layout options, material selections, and a detailed, line-item proposal with locked pricing.
Build & Deliver
Construction begins with daily cleanup, weekly photo updates, and a final walkthrough backed by our 2-year warranty.
Full vs. Partial Second Story
A full second story addition sits over the entire existing footprint of your home, doubling your living space. A partial addition covers only a portion — commonly above the garage, rear of the home, or a single wing.
Partial additions are less expensive and structurally simpler because less of the existing roof structure is disturbed. Full second stories require more extensive structural work and a complete roofline rebuild.
What We Typically Add
- •Master suite with walk-in closet and en-suite bathroom
- •Secondary bedrooms
- •Shared bathrooms
- •Home office or study
- •In-law suite with private entrance
- •Laundry room relocation
The Structural Engineering Process
A second story addition is structurally more complex than a single-story room addition. Before pricing any project, we conduct a structural assessment of your existing foundation, walls, and framing.
Our licensed structural engineer evaluates load-bearing capacity, shear wall requirements, and foundation adequacy. This assessment is included in our design phase — you receive a complete picture before any work begins.
San Diego-Specific Considerations
- •Most residential zones allow up to 30 ft height
- •Coastal zones (La Jolla, Del Mar, Encinitas) have stricter limits
- •HOA restrictions may apply — we verify before design
- •Slab foundations frequently need reinforcement
- •Fire separation requirements for in-law suites
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Get Your Free EstimateSecond Story Additions by Service Area
We serve homeowners across San Diego County. Explore city-specific pages for pricing, project fit, and local permitting context.
Second Story Additions in San Diego
See how this service fits homes, neighborhoods, and remodel goals in San Diego.
Second Story Additions in La Jolla
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Second Story Additions in Del Mar
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Second Story Additions in Rancho Santa Fe
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Second Story Additions in Carmel Valley
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Second Story Additions in Solana Beach
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Second Story Additions in Encinitas
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Second Story Additions in Carlsbad
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Second Story Additions in Oceanside
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Second Story Additions in Poway
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Related Remodeling Services
If you're considering how to add more living space, you may also be weighing a ground-level room addition, an ADU, or a whole-home remodel.
Kitchen Remodeling
Complete kitchen transformations from layout to finishes.
$25,000 – $100,000+
Bathroom Remodeling
Full bathroom renovations built around quality and durability.
$15,000 – $60,000+
Whole-Home Remodel
Full-scale renovations that transform your entire living space.
$150,000 – $300,000+
Room Additions
Seamless expansions that feel original to the home.
$90,000 – $250,000+
ADU Construction
Accessory dwelling units designed and built to match the main home.
$150,000 – $350,000+
Design Services
Architectural design and planning to bring your vision to life.
Varies by scope
Frequently Asked Questions
Answers to the questions we hear most from San Diego homeowners considering a second story.
Second story additions in San Diego typically cost $150,000 to $350,000+, depending on the square footage, whether it's a full or partial addition, structural requirements, and finish level. Partial additions (above the garage, for example) cost less than full-footprint second stories. Per-square-foot costs run $300 to $500, driven by the structural engineering, roofline work, and staircase integration.
Construction takes 4 to 6 months depending on size and complexity. Design and permitting add another 2 to 4 months before construction begins. The full project from initial consultation to move-in is typically 7 to 10 months. Second story additions require more lead time than single-story additions because of the structural engineering process.
Often, yes. We conduct a structural engineering assessment before pricing any second story project. San Diego's common slab-on-grade foundations are frequently adequate for a partial addition, but a full second story typically requires foundation reinforcement and upgraded shear walls. We factor this into the proposal — no surprises after work begins.
In most cases, yes. The most disruptive phase is when the existing roof is opened and the staircase opening is cut. We sequence work to minimize daily disruption and protect the living areas below with temporary barriers. If the timeline includes periods where the roof is open, we coordinate weather windows and temporary weatherproofing.
Yes. Second story additions require a building permit from the City of San Diego, including structural engineering drawings and plan review. Properties in coastal overlay zones (La Jolla, Del Mar, Encinitas) may also require a Coastal Development Permit. We handle all permit applications, plan submittals, and inspector coordination.
Most San Diego residential zones allow a maximum height of 30 feet. Single-family residential zones typically allow up to 24–30 feet depending on the zone designation. Coastal overlay zones have stricter limits — often 28 feet from grade. Some communities with HOAs have their own additional restrictions. We verify height limits for your specific parcel during the design phase.
From Our Blog
Home addition guides, permit breakdowns, and renovation ROI data for San Diego homeowners.
Ready to Add a Second Story?
Schedule a free consultation. We'll assess your home's structure, walk through the options, and give you realistic numbers with no pressure.