Residential
& Commercial
Maintenance
Trusted asphalt repair, seal coating, and property maintenance for homeowners and businesses across Lombard, IL and all surrounding areas.
Our Services
Parking Lot Seal Coating
Protect and enhance your parking lot with our professional seal coating services. We specialize in durable coatings that extend the lifespan of your asphalt surfaces. Trust 321 Improvement for reliable maintenance solutions.
Expert Property Maintenance
Commercial and residential property services built to last. We show up, we do the work, and we stand behind it.
Crack Sealing
Prevent water infiltration and structural damage with professional crack filling for driveways and parking lots.
Line Striping
Crisp, durable line striping, ADA markings, and directional arrows for parking lots and commercial properties.
Pothole Repair
Fast, lasting pothole patching and asphalt repair to restore smooth, safe surfaces for vehicles and pedestrians.
Driveway Resurfacing
Full driveway resurfacing to restore worn, damaged asphalt to a smooth, like-new surface.
New Decks & Patios
Custom deck and patio construction for residential and commercial properties throughout Chicagoland.
Concrete Work
Professional concrete installation and repair for driveways, walkways, curbs, and more.
Walkways
Walkway installation and repair using asphalt, concrete, or pavers — built to last through Midwest winters.
Interior & Exterior Painting
Professional interior and exterior painting for residential and commercial properties. Clean, quality finishes every time.
Deck & Fence Staining
Protect and beautify your deck and fence with professional staining and sealing services.
Before & After
See the difference professional seal coating and asphalt repair makes — residential driveways and commercial parking lots transformed in a single day.
Commercial Parking Lot — Seal Coat & Line Striping
Faded, worn parking lot — cracked asphalt, faded striping
Fresh seal coat + new yellow line striping — like new
Residential Driveway — Seal Coating
Cracked, gray driveway — oxidized and unprotected
Deep black seal coat — restored and protected for years
Residential Driveway — Full Seal Coat
Worn, gray driveway — needs seal coat and protection
Fresh seal coat — clean, dark, and protected
Ready for results like this? Get your free estimate today.
Call 815-977-7558Frequently Asked Questions
How much does driveway seal coating cost in Lombard, IL?
Driveway seal coating costs vary based on size and condition, but most residential driveways in the Lombard, IL area range from $200–$1,000. Call 815-977-7558 for a free estimate.
How often should I seal coat my driveway?
Most asphalt driveways should be seal coated every 2–3 years to protect against water damage, UV rays, and cracking. New driveways should wait 6–12 months before their first seal coat.
Do you repair potholes in parking lots?
Yes — we provide fast, durable pothole repair for both residential driveways and commercial parking lots throughout DuPage County, IL.
What areas do you serve?
We serve Lombard, Downers Grove, Wheaton, Glen Ellyn, Villa Park, Elmhurst, Addison, Bloomingdale, Carol Stream, Glendale Heights, and surrounding DuPage County communities — and all of Chicagoland.
Better yet, see us in person!
Call anytime — we're here when you need us.