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ZAVALA & SONS
Home Improvement

We're Building
Something Great

Hammers are swinging on our new digital home. Same family, same crew, same promise. Premium remodeling done right the first time, and we'll be back online soon.

Wilmington, DE·(302) 781-2834·Licensed & Insured
9:415G
Licensed
Remodeling You'd Recommend.
Free Estimate
200+
Projects
15+
Years
5★
Rated
Services
One crew. Every part of your home.
Kitchens
Bathrooms
Additions
Decks

"Communication was constant and the craftsmanship is incredible."

Sarah M, Hockessin
Let's start with a free estimate.
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Sneak Peek
Zavala & Sons

Our Services

Additions in Wilmington, DE

Add the space your family deserves. Second stories, in-law suites, sunrooms and full-scale additions built to blend seamlessly with your existing home.

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What's included

  • Second-story additions
  • In-law suites & ADUs
  • Sunrooms & bump-outs
  • Garage conversions
  • Permit & engineering coordination
  • Roof tie-ins & HVAC extension

Our 4-step process

  1. 01

    Free Estimate

    We meet at your home, listen to your vision, and provide a clear written quote.

  2. 02

    Design & Plan

    We finalize materials, scope, timeline, and pull all required permits.

  3. 03

    Build

    Our crew shows up on time, cleans up daily, and keeps you updated weekly.

  4. 04

    Walkthrough

    Final inspection together, punch list completed, written workmanship warranty.

Typical pricing

Tier
Bump-Out or Sunroom
$40,000–$100,000
Tier
Single-Story Addition
$100,000–$250,000
Tier
Second-Story or Whole-Home Addition
$250,000+

Every estimate is written, itemized, and free. Final pricing depends on scope, materials, and site conditions.

Frequently asked questions

How much does a home addition cost in Wilmington, DE?

Home additions in Wilmington typically run $40,000 for a small bump-out to $250,000+ for a second-story or in-law suite. Cost depends on foundation work, roof tie-ins, HVAC extensions, and finish level. Every estimate is written and itemized.

How long does an addition take?

Most additions take 4–8 months from signed contract to final walkthrough. Design and engineering 4–6 weeks, permits 4–8 weeks, foundation 2–3 weeks, framing through finishes 3–5 months.

Do I need a permit and engineering for an addition?

Yes, additions require a building permit, structural engineering, and county or municipal inspections. Zavala & Sons coordinates the architect, engineer, and permit office for you so you don't chase paperwork.

Are you licensed and insured?

Yes. Zavala & Sons holds a Delaware business license, full general liability insurance, and workers compensation coverage. We provide a current Certificate of Insurance on request.

Request a free additions estimate

We respond within 1 business day.

No obligation. Licensed & insured. We respond within 1 business day.

Local service area

Additions near you

We build in cities across Delaware, Pennsylvania, Maryland and New Jersey. Pick yours for local details.

Wilmington, DE Newark, DE Bear, DE Hockessin, DE Middletown, DE New Castle, DE Smyrna, DE Dover, DE West Chester, PA Kennett Square, PA Chadds Ford, PA Glen Mills, PA Media, PA Chester, PA Downingtown, PA Elkton, MD North East, MD Pennsville, NJ Cherry Hill, NJ Deptford, NJ
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