Local in Wilmington, DE
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. A father-and-sons crew with decades of building experience, serving Wilmington homeowners and the surrounding region.
- Local to Wilmington & familiar with DE codes
- Free written, itemized estimates
- Licensed, insured & W-2 crew
- Workmanship warranty in writing
Free Additions Estimate in Wilmington
We respond within 1 business day.
Additions in Wilmington
What additions projects look like in Wilmington
The Wilmington homes we work in are mostly 1900s–1960s mix, typically brick rowhomes, colonials, and Victorians. We've completed projects across Trolley Square, the Highlands, Westover Hills, and Brandywine Hundred.
Wilmington's older homes often surface lead paint, knob-and-tube wiring, or galvanized plumbing. We inspect for these conditions before quoting and bring in the right certified specialists when the project calls for them.
Second-story additions on Wilmington's narrower lots in the Highlands and Trolley Square need careful sightline and shadow planning, we draw it before we quote it.
Recent in Wilmington
Additions project examples we've delivered in the area
kitchen + main floor remodel
a 1928 Highlands colonial
primary bathroom expansion
a Trolley Square rowhouse
sunroom addition with composite deck
a Westover Hills colonial
Project examples reflect typical scopes and budget ranges for the area. Final estimates always written, itemized, and free.
What we build in Wilmington
Additions services for Wilmington, DE homeowners
Whether you're refreshing a single room or planning a full additions project in Wilmington, our family-run crew handles every step, design, permits, build, finish, and final walkthrough, without subbing the work out to a stranger.
- Second-story additions
- In-law suites & ADUs
- Sunrooms & bump-outs
- Garage conversions
- Permit & engineering coordination
- Roof tie-ins & HVAC extension
Typical additions pricing in Wilmington
Our process in Wilmington
- 01
Free Estimate
We meet at your home, listen to your vision, and provide a clear written quote.
- 02
Design & Plan
We finalize materials, scope, timeline, and pull all required permits.
- 03
Build
Our crew shows up on time, cleans up daily, and keeps you updated weekly.
- 04
Walkthrough
Final inspection together, punch list completed, written workmanship warranty.
Additions FAQs from Wilmington homeowners
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.