We survey our customers, whether a deal succeeds or fails, and show you their reviews. Learn More
1,046 HOMES CLOSED IN:
Currently taking calls
1,046
Total Deals
$322M
Sales volume
$875K
Highest sales price
About William
I am an experienced and dedicated realtor who specializes in helping people achieve their real estate goals. I’ve been a resident of Delaware since 1998. Our state may be small, however, we have a lot to offer from urban locations, to sprawling suburbs, to quiet and quaint beach towns. I am an alumnus of Temple University in Philadelphia, PA and I hold a bachelor’s degree in finance. My unique combination of real estate and finance can help you navigate the housing industry.
With over 20 years’ experience, I continually strive to build initial and lasting relationships with those I serve. I am very confident that my knowledge of the local housing markets will help you sell your home or purchase the home of your dreams. I look forward to partnering with you.
William's Listings & Sales
Active Listings (5)
Sold with William (300+)
Bought with William (300+)
1 of 25
LISTED BY REDFIN
3D WALKTHROUGH
$425,000
103 Anglin Dr
Newark, DE 197133
Beds
1.5
Baths
2,150
Sq. Ft.
William Sladek • (484) 962-0034
1 of 23
LISTED BY REDFIN
3D WALKTHROUGH
$345,000
361 Kesselring Ave
Dover, DE 199043
Beds
1.5
Baths
2,088
Sq. Ft.
William Sladek • (484) 962-0034
1 of 32
LISTED BY REDFIN
3D & VIDEO TOUR
$665,000
312 Galloway St
Middletown, DE 197094
Beds
2.5
Baths
4,475
Sq. Ft.
William Sladek • (484) 962-0034
1 of 26
LISTED BY REDFIN
3D WALKTHROUGH
$520,000
66 Mischief Ln
Smyrna, DE 199774
Beds
2.5
Baths
2,246
Sq. Ft.
William Sladek • (484) 962-0034
1 of 9
LISTED BY REDFIN
$179,000
1905 W Second St
Wilmington, DE 198053
Beds
1
Bath
1,275
Sq. Ft.
William Sladek • (484) 962-0034
William's Insights
111 Tuckahoe Ln, Bear, DE 19701$379,9003 beds2.5 baths2,185 sq ft111 Tuckahoe Ln, Bear, DE 19701"Please contact Bill Sladek at 302-494-8100 to schedule a private tour. Additionally, if you are a homeowner contemplating selling your property, I would be pleased to discuss the..."Saw this home 2 Days Ago
217 Southerland Dr, New Castle, DE 19720$349,9003 beds1.5 baths1,800 sq ft217 Southerland Dr, New Castle, DE 19720"Please contact Bill Sladek at 302-494-8100 to schedule a private tour. Additionally, if you are a homeowner contemplating selling your property, I would be pleased to discuss the..."Saw this home 2 Days Ago
18 W Redmont Rd, Wilmington, DE 19804$399,0003 beds2 baths1,825 sq ft18 W Redmont Rd, Wilmington, DE 19804"Please contact Bill Sladek at 302-494-8100 to schedule a private tour. Additionally, if you are a homeowner contemplating selling your property, I would be pleased to discuss the..."Saw this home 2 Days Ago
William's Reviews
Most Recent Reviews
5.0
I remember meeting Bill in NJ in late September when I decided to sell the house. From that poiunt on, he took care of everything regarding the house until it was sold. The last time I was in the house was in late August and he had been taking care of everything up until the house was sold last week. I can only thank him for all the help and the peace of mind he provided.
Townhome seller closed Jan '26
356 Tribbitt St, Dover, DE
356 Tribbitt St, Dover, DE
$273K • 3 Bed, 2.5 Bath, 1872 Sq. Ft. • Multiple offers
5.0
Mr. Sladek was very professional and knowledgeable, yet personable. He was efficient in responding to our requests.
4.5
Willam Sladek is a gentle person. He is very good in his work. He worked closely to completed my house deal. And I would definitely recommend him wherever i can. All the best. Thank you
House seller closed Dec '25
2031 Saint James Church Rd, Wilmington, DE
2031 Saint James Church Rd, Wilmington, DE
$535K • 4 Bed, 2.5 Bath, 2325 Sq. Ft.
5.0
William was very helpful, keep me updated of every show. I realy like that.
5.0
Bill is the best agent I have worked with. He made the process of buying a new home in an unfamiliar area way easier. His knowledge of the market and the area was invaluable. He was also great with communication, which we found to be very important with being long distance buyers. I would highly recommend Bill to anyone looking for an agent for buying or selling. He is clearly very experienced and knowledgeable and is an absolute pleasure to work with.
See All Reviews
Why work with a Redfin Agent
Why work with a Redfin Agent
Personal service from a local expert
We live and work in your area and know the market inside out. From pricing to closing, we'll provide the guidance you need at every step.
Better service at a better price
Redfin Agents meet customers on Redfin.com, so they don’t spend time looking for new clients—they focus only on you.
Happier in your new home
Our customer satisfaction rates are consistently higher than the competition, thanks to our technology and local agents.
Meet William's Team
When you work with Redfin, one agent is responsible for your success, but you really get a whole team. Redfin agents work closely with a team of real estate professionals to ensure every sale closes without a hitch.
Nanette Guida
Transaction Coordinator
Sara Ross
Listing Coordinator
Popular searches
- Wilmington Real Estate Agents
- Rehoboth Beach Real Estate Agents
- Newark Real Estate Agents
- Lewes Real Estate Agents
- Bethany Beach Real Estate Agents
- Middletown Real Estate Agents
- Dover Real Estate Agents
- Bear Real Estate Agents
- New Castle Real Estate Agents
- Fenwick Island Real Estate Agents
- Hockessin Real Estate Agents
- Smyrna Real Estate Agents
- Selbyville Real Estate Agents
- Dewey Beach Real Estate Agents
- Milton Real Estate Agents
Popular cities
- Wilmington Homes for Sale
- Rehoboth Beach Homes for Sale
- Newark Homes for Sale
- Lewes Homes for Sale
- Bethany Beach Homes for Sale
- Middletown Homes for Sale
- Dover Homes for Sale
- Bear Homes for Sale
- New Castle Homes for Sale
- Fenwick Island Homes for Sale
- Hockessin Homes for Sale
- Smyrna Homes for Sale
- Selbyville Homes for Sale
- Dewey Beach Homes for Sale
- Milton Homes for Sale
About us
Find us
Subsidiaries
Affiliated Business
United States
CanadaCopyright: © 2026 Redfin. All rights reserved.
Updated September 2025: By searching, you agree to the Terms of Use, and Privacy Policy.
Do not sell or share my personal information.
REDFIN and all REDFIN variants, WALK SCORE, and the R logos, are trademarks of Redfin Corporation, registered or pending in the USPTO.
California DRE #01521930
Redfin is licensed to do business in New York as Redfin Real Estate. NY Standard Operating Procedures
New Mexico Real Estate Licenses
TREC: Info About Brokerage Services, Consumer Protection Notice
All mortgage lending products and information are provided by Rocket Mortgage, LLC | NMLS #3030; www.NMLSConsumerAccess.org. Licensed in 50 states. This site is not authorized by the New York State Department of Financial Services for mortgage solicitation or loan applications activities related to properties located in the State of New York.
Redfin Corporation is an affiliated business of Rocket Limited Partnership. Each company, and their subsidiaries, are separate legal entities operated and managed through its own management and governance structures.
If you are using a screen reader, or having trouble reading this website, please call Redfin Customer Support for help at 1-844-759-7732.
REDFIN IS COMMITTED TO AND ABIDES BY THE FAIR HOUSING ACT AND EQUAL OPPORTUNITY ACT. READ REDFIN'S FAIR HOUSING POLICY AND THE NEW YORK STATE FAIR HOUSING NOTICE.