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Home Addition in Carmel

Custom Home builds home additions in Carmel at $500-$750 per square foot. Whether you need a second-story addition, ground-floor expansion, or bump-out, our two-phase process delivers 3D visualization and itemized pricing before construction starts.

How much does a home addition cost in Carmel?

Home additions in Carmel typically cost $500-$750 per square foot in 2026. A 500 sqft addition ranges from $250K to $375K. Custom Home's design phase locks in your exact cost before construction starts.

Why Expand Your Carmel Home

Carmel’s strong property values and desirable neighborhoods make home additions a smart investment. Rather than uprooting to a new location, expanding your current home lets you stay in the community you chose. The Monterey Peninsula’s resort-style character and appreciation for architectural quality make it a distinctive market.

Custom Home designs and builds home additions with the same two-phase process we use for custom homes. You see the complete addition in 3D and receive itemized pricing before construction begins.

Types of Home Additions We Build in Carmel

Second-Story Additions

Double your living space by building up rather than out. Second-story additions are ideal when lot coverage limits prevent ground-floor expansion. Custom Home’s structural engineers evaluate your existing foundation to determine what reinforcement is needed.

Ground-Floor Room Additions

Extend your home’s footprint with new bedrooms, family rooms, or home offices. Ground-floor additions integrate with your existing layout and maintain single-level living, which is especially valued in Carmel.

Bump-Outs and Extensions

Smaller expansions that make a significant difference: extend your kitchen, enlarge a bathroom, or add a sunroom. Bump-outs typically cost less and complete faster than full additions.

Structural Considerations for Carmel Additions

Home additions in Carmel require careful structural planning to ensure the new space integrates safely with the existing structure. Custom Home’s engineering team handles foundation evaluation, load-bearing wall modifications, and structural design. Whether you are adding a second story or expanding your footprint, structural engineering is included in our Phase 1 design process.

Carmel Home Addition Permits

Carmel-by-the-Sea requires all new construction and significant exterior modifications to go through the city’s Design Review Board before building permits are issued. This review process evaluates architectural compatibility, materials, colors, and site planning. Combined with standard plan check, the full approval timeline for a custom home can range from 4 to 8 months. Custom Home’s design team prepares thorough submissions that address all Design Review Board criteria, helping to minimize revisions and delays.

Custom Home manages the entire addition permitting process, including structural engineering review, plan submittal, and inspection coordination. Our experience with Carmel’s requirements helps keep the approval process on track.

Pricing for Home Addition in Carmel

Home addition costs in Carmel typically run $500-$750 per square foot, similar to new construction pricing. Second-story additions may cost more due to structural reinforcement requirements. Custom Home's Phase 1 design process locks in exact pricing before construction begins.

Carmel Permit Requirements

Carmel-by-the-Sea requires all new construction and significant exterior modifications to go through the city's Design Review Board before building permits are issued. This review process evaluates architectural compatibility, materials, colors, and site planning. Combined with standard plan check, the full approval timeline for a custom home can range from 4 to 8 months. Custom Home's design team prepares thorough submissions that address all Design Review Board criteria, helping to minimize revisions and delays. Custom Home manages the full addition permitting process, including structural engineering review.

Home Addition in Carmel: FAQ

How much does a home addition cost in Carmel?

Home additions in Carmel typically cost $500-$750 per square foot. A 400 sqft room addition generally ranges from $200K to $300K. Second-story additions may cost more due to structural reinforcement. Custom Home locks in exact pricing during Phase 1.

How long does a home addition take in Carmel?

Home additions in Carmel typically take 6-12 months from design to completion. Second-story additions require 8-14 months due to additional structural work. Custom Home's design phase ensures construction runs efficiently and on schedule.

Can my Carmel home support a second-story addition?

Most homes can be structurally reinforced for a second story. Custom Home's engineering team evaluates your foundation and framing during Phase 1 to determine what modifications are needed and includes those costs in the itemized scope.

Get a Free Home Addition Quote in Carmel

Tell us your vision. We'll show you the design, itemize every cost, and build it exactly as promised.

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