Home Additions in Del Mar, CA

A & H Sullivan Construction builds custom home additions for Carlsbad homeowners who need more space.

Call (619) 837-5542
A newly completed single-story room addition attached to a Carlsbad single-family home, showing matched exterior stucco finish and a new window line that aligns with the original structure. The addition extends the rear of the home toward a landscaped backyard typical of a North San Diego County residential neighborhood.

Expert Home Additions in Del Mar, CA

Home additions in Carlsbad give you more living space without leaving a neighborhood you already love. At A & H Sullivan Construction, we handle room additions, second-story builds, primary suite expansions, and family room extensions from start to finish. Carlsbad's mix of established neighborhoods, from La Costa to Olde Carlsbad, includes many single-family homes built decades ago on lots that have room to grow. We assess your existing structure, coordinate with local building departments, and manage every trade on site. Our team works with your home's current footprint and style so the new space feels like it was always there. Whether you need a dedicated home office, a larger primary suite, or an extra bedroom for a growing family, we plan the addition around how you actually use your home. Call A & H Sullivan Construction to schedule a site visit and get a clear plan for your Carlsbad addition.

What's included

  • Added square footage increases your Carlsbad home's resale value in a high-demand market
  • New living space is designed to match your home's existing structure and exterior style
  • A dedicated general contractor manages all trades, keeping the project organized and on budget
  • Expanding your current home avoids the cost and disruption of buying and moving to a larger property
  • Custom layout planning means the new space fits how your household actually lives day to day
  • Proper structural integration protects your home's integrity and meets Carlsbad building code requirements
Precision Woodworking
Excellent Customer Service
Custom Exterior Carpentry Expert
Fully Licensed Contractor

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Home Additions FAQ

Common questions about home additions in Del Mar, CA.

Yes, we build second-story additions for Carlsbad homeowners where the existing foundation and structure can support the load. We evaluate your home's current framing and foundation before any plans are drawn.

We build room additions, primary suite expansions, family room extensions, and second-story additions throughout Carlsbad. Each project is scoped to your lot, your home's existing structure, and your household's needs.

Yes, we design the addition to match your home's current roofline, exterior finish, and interior style. The goal is a result that looks and feels like original construction, not a tacked-on addition.

Most Carlsbad homeowners stay in their homes during an addition, depending on which part of the house is affected. We discuss the work sequence with you upfront so you know what to expect at each stage.

Yes, as a licensed general contractor we coordinate all trades, including framing, electrical, plumbing, and finish work, on your Carlsbad project. You have one point of contact from the first site visit through final walkthrough.

Many older Carlsbad neighborhoods, including parts of Olde Carlsbad and La Costa, have lots with usable space for a ground-floor or vertical addition. We review your specific lot dimensions and setback requirements before recommending a scope.

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What San Diego County customers say.

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The craftsmanship was exactly what I was hoping for. It was clear they took the time to get the details right instead of rushing through it.

Marcus T. Google review

They listened to what I wanted and built it that way. Communication was easy the whole time and the finished work looks great.

Diane R. Google review

Solid work and a crew that respects your space. I appreciated how clean they kept the site and how straightforward everything was from the first call.

Kevin L. Google review

Proudly Based in San Diego, CA

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Hours

  • Monday 7:00 AM - 5:00 PM
  • Tuesday 7:00 AM - 5:00 PM
  • Wednesday 7:00 AM - 5:00 PM
  • Thursday 7:00 AM - 5:00 PM
  • Friday 7:00 AM - 5:00 PM
  • Saturday Closed
  • Sunday Closed

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