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Sussex County, DE Office Spaces for Sale

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Wilmington, DE Dover, DE Seaford, DE Milford, DE Millsboro, DE Newark, DE Lewes, DE New Castle, DE
76 properties
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Medical Office with Expansion Space
Updated: Nov 10, 2025
Medical Office with Expansion Space

924 MIDDLEFORD Road, Seaford, DE 19973

$780,000
0.51 AC lot
3,053 sq. ft. of finished first‑floor medical office space
2,182 sq.ft. unfinished second floor with separate access and interior stair connection
Reception, administrative offices, exam rooms, bathrooms, staff lounge, storage, and mechanical rooms
Adjacent parcel on the west side included
0.51‑acre combined property
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Small Office Building with On-Site Parking
Updated: Apr 9
Small Office Building with On-Site Parking

26286 SEAFORD Road, Seaford, DE 19973

$280,000
0.68 AC lot
Professional small office building with on‑site parking and a layout suited for professional firms, non‑profits, and service‑oriented small businesses
Direct frontage on Seaford Road with easy access and close proximity to Route 13 and Route 20
Interior includes multiple private offices, flexible workspaces, and an open conference/training area
Includes a kitchenette and restroom
Garage/shed on‑site for storage of files, equipment, or tools
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Office Building with Parking
Office Building with Parking

602 N PORTER Street, Seaford, DE 19973

$399,900
0.29 AC lot

Office property with central air, an on-site parking lot, and access to Rt. 20.

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Versatile Commercial Building on 4.4 Acres
Versatile Commercial Building on 4.4 Acres

1120 S CENTRAL Ave, Laurel, DE 19956

$1,299,000
7,006 sqft 4.40 AC lot

7,006 SF building on 4.4 acres in Laurel, DE.

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Commercial Property on Major Highway
Commercial Property on Major Highway

8991 REDDEN Rd, Bridgeville, DE 19933

$1,250,000
4,200 sqft 2.00 AC lot

C-1 zoned commercial property on 2 acres for sale.

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Versatile Commercial Property on Dupont
Versatile Commercial Property on Dupont

719 S DUPONT Blvd, Milford, DE 19963

$625,000
4,408 sqft 0.95 AC lot

Two buildings totaling 4,408 SF on a sizable lot.

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Professional Office Building with Pond View
Professional Office Building with Pond View

924 Middleford Rd, Seaford, DE 19973

$780,000
5,235 sqft

Office building with expansion potential and adjacent parcel included.

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Downtown Milford Investment Property
Downtown Milford Investment Property

105-111 NE Front Street, Milford, DE 19963

$1,990,000
10,712 sqft

Fully-tenanted professional office space in Milford, Delaware.

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High-Visibility Corner Flex Property
High-Visibility Corner Flex Property

34051 Dupont Boulevard, Frankford, DE 19945

$995,000
3,000 sqft

Corner commercial property with kitchen-equipped space, sectioned offices, dedicated storage, and a secondary storage structure.

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Dagsboro Mixed-Use Property For Sale
Dagsboro Mixed-Use Property For Sale

31229 Dupont Boulevard, Dagsboro, DE 19939

$1,200,000
6,900 sqft 1.44 AC lot

Mixed-use property with office, and storage buildings on 1.44 acres.

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Seaford Medical Office Building For Sale
Seaford Medical Office Building For Sale

11 Fallon Ave, Seaford, DE 19973

$2,500,000
10,600 sqft

Well-maintained medical office building in Seaford, Sussex County.

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Professional Office Building with Parking
Professional Office Building with Parking

26286 Seaford Rd, Seaford, DE 19973

$280,000
1,440 sqft

Small office building suited for professional firms and service businesses.

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Income-Producing Land with Development Potential
Income-Producing Land with Development Potential

26539 Lewes Georgetown Highway, Harbeson, DE 19951

$2,200,000
4,500 sqft 7.18 AC lot

7.18±-acre CR-1 zoned property with income and development potential.

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Milton Medical Park Investment Opportunity
Milton Medical Park Investment Opportunity

611 Federal Street, Milton, DE 19968

$3,975,000
12,860 sqft

Fully leased medical office park with expansion potential in Milton, DE.

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Harbeson Commercial Property on Route 9
Harbeson Commercial Property on Route 9

26473 Lewes Georgetown Highway, Harbeson, DE 19951

$1,390,000
1,748 sqft 0.98 AC lot

0.98-acre commercial property on Route 9 in Harbeson, Delaware.

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Zoned UB3 Office Building
Zoned UB3 Office Building

123 W MARKET STREET, Georgetown, DE 19947

$599,999
3,000 sqft 1.50 AC lot

Office building on a large lot with on-site parking, zoned UB3 for professional use in Georgetown, Delaware.

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Freestanding Commercial Building with BG Zoning
Freestanding Commercial Building with BG Zoning

1973 Bay Road, Milford, DE 19963

$949,000
14,400 sqft

Fully leased freestanding building on high-visibility Bay Road, zoned BG for retail, office, and medical uses.

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Corner Office Condo
Corner Office Condo

1310 Middleford Road, Seaford, DE 19973

$264,625
2,117 sqft

Commercial condo at the entrance to a waterfront professional office park near TidalHealth Nanticoke.

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Two-Unit Office Property
Two-Unit Office Property

18119 SUSSEX HIGHWAY, Bridgeville, DE 19933

Contact for pricing
13,000 sqft 6.00 AC lot

Two separately secured suites support flexible occupancy, with individual entries, dedicated restrooms, and shared site infrastructure.

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Medical Office Building with Tenant
Medical Office Building with Tenant

800 Concord Road, Seaford, DE 19973

Contact for pricing
4,800 sqft

Approximately 4,800 SF medical office building is occupied by Planned Parenthood under an in-place lease.

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Renovated NNN Commercial Property
Renovated NNN Commercial Property

105111 NE FRONT STREET, Milford, DE 19963

$1,990,000
12,422 sqft

Recently renovated property with two established tenants under NNN lease terms.

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Versatile Retail/Office Suite
Versatile Retail/Office Suite

512 W STEIN HIGHWAY #1, Seaford, DE 19973

Contact for pricing
6,400 sqft

Unit 1 storefront suite at 512 W Stein Highway offers flexible space for a range of business concepts.

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Second-Floor Office Suites
Second-Floor Office Suites

18335 Coastal Highway, Lewes, DE 19958

Contact for pricing
3,060 sqft

Second-floor office suites with reception, private offices, open workspace, kitchenette, and two private restrooms.

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Medical Office Building with Exam Rooms
Medical Office Building with Exam Rooms

375 MULLET RUN, Milford, DE 19963

Contact for pricing
2,500 sqft

Turnkey-ready medical office with patient reception, clinical rooms, administrative offices, and ADA accessibility.

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Sussex County, DE Office Spaces Market Trends and Statistics

Explore 76 office spaces for sale in Sussex County, DE, showcased through 76 active listings on our real estate platform. These investment opportunities span a total of 10,254,570 square feet of properties for sale, with an estimated market value of $37,080,424.

Sale prices for office spaces in Sussex County, DE start at $264,625, averaging $1,324,300, and reaching up to $3,975,000 — offering options for a variety of budgets and business needs. Daily updated analytics ensure you stay ahead with the latest data and market trends.

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