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New Castle County, DE Office Buildings for Sale

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Wilmington, DE Dover, DE Lewes, DE Milford, DE Millsboro, DE Newark, DE Seaford, DE Milton, DE
32 properties
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Historic Three-Level Office Building
Updated: Aug 14
Historic Three-Level Office Building

1919 RED LION Road, Bear, DE 19701

$799,900
3.28 AC lot
More than 6,500 square feet across three usable levels
3.28‑acre property at 1919 Red Lion Road, Bear, DE 19701
Built in 1751 with brick construction
Private offices, conference rooms, open work areas, and flexible meeting spaces
Renovated kitchen and employee gym on the lower level
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Three-Building Mixed-Use Assemblage
Updated: Aug 7
Three-Building Mixed-Use Assemblage

1719 1719-23 Delaware Ave, Wilmington, DE 19806

$1,350,000
11,376 sqft
Three‑building assemblage totaling 11,376 SF
1986 construction with a four‑level office building, including a lower level
Retail tenancy, salon space, and a residential dwelling unit across the assemblage
On‑site parking plus additional off‑site parking nearby
Located in Wilmington’s Trolley Square/Forty Acres district
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7-Unit Office Building
7-Unit Office Building

4708 Kirkwood Highway, Wilmington, DE 19808

$1,475,000
11,000 sqft

Renovated in 2024, the property is fully occupied across its multi-unit office configuration.

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Historic Office Building with Flexible Layout
Historic Office Building with Flexible Layout

501 MAIN STREET, Odessa, DE 19730

$799,900
5,300 sqft

Office property with private rooms, shared work areas, updated systems, storage, and on-site parking.

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Historic Office Building
Historic Office Building

1919 RED LION ROAD, Bear, DE 19701

$799,900
6,537 sqft

Three-level professional property with private offices, conference rooms, open work areas, and on-site parking.

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Multi-Tenant Office Building with Parking
Multi-Tenant Office Building with Parking

2400 W 4th St, Wilmington, DE 19805

$950,000
8,650 sqft

Well-maintained multi-tenant office building features dual entrances, private parking, and updated interior office, storage, and conference space.

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Downtown Multi-Level Office Building
Downtown Multi-Level Office Building

1326 N King St, Wilmington, DE 19801

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4,326 sqft

Flexible professional office layout with private rooms, meeting areas, reception space, and storage across multiple levels.

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Multi-Story Office Building with 2-Car Garage
Multi-Story Office Building with 2-Car Garage

1205 N Orange St, Wilmington, DE 19801

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7,200 sqft

Multi-story office building with on-site 2-car garage, security on each floor, and office setup across three levels.

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North Wilmington Office Building For Sale
North Wilmington Office Building For Sale

1200 Philadelphia Pike, Wilmington, DE 19809

$3,200,000
30,000 sqft

Three-story office building in North Wilmington with flexible spaces.

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Two-Story Elevator-Served Office Building
Two-Story Elevator-Served Office Building

527 Stanton Christiana Road, Newark, DE 19713

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4,500 sqft

Medical and office property with elevator access, surface parking, ON zoning, and convenient connections to I-95.

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Freestanding Office Building
Freestanding Office Building

221 N Broad St, Middletown, DE 19709

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3,850 sqft

Standalone office property offering a compact commercial footprint in Middletown.

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Centerville Office Building For Sale
Centerville Office Building For Sale

5811 Kennett Pike, Wilmington, DE 19807

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10,691 sqft

Three-level office building in the heart of Centerville, Delaware.

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Class A Medical Office Development
Class A Medical Office Development

150 Red Mill Rd, Newark, DE 19711

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60,000 sqft

Proposed 3-story Class A office building with a 2-story atrium and zoning for medical or general office use.

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Centerville Office Building For Sale
Centerville Office Building For Sale

5809 Kennett Pike, Wilmington, DE 19807

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10,691 sqft

Three-level office building in desirable Centerville location.

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Montchanin Office Complex For Sale
Montchanin Office Complex For Sale

100 W Rockland Rd, Montchanin, DE 19710

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11,500 sqft

Two-building office complex in historic Montchanin, Delaware.

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Class A Office Space Available
Class A Office Space Available

405 Silverside Road, Wilmington, DE 19809

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50,000 sqft

Premier office space in North Wilmington with highway access.

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Two-Story Office Building
Two-Story Office Building

101 W Park Pl, Middletown, DE 19709

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3,700 sqft 1.15 AC lot

Purpose-built professional layout with private offices, shared waiting areas, and a multipurpose room.

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Two-Building Office Center with Amenities
Two-Building Office Center with Amenities

2751 Centerville Rd, Wilmington, DE 19808

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100,000 sqft

Two Class A office buildings with on-site amenities.

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Two-Building Office Complex For Sale
Two-Building Office Complex For Sale

2711 Centerville Road, Wilmington, DE 19808

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100,000 sqft

Two four-story office buildings with on-site amenities and ample parking.

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North Wilmington Commercial Property For Sale
North Wilmington Commercial Property For Sale

2417 SILVERSIDE Rd, Wilmington, DE 19810

$895,000
0.40 AC lot

Premium commercial property in North Wilmington with high visibility and accessibility.

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Premier Newark Business Park
Premier Newark Business Park

100 Lake Drive, Newark, DE 19702

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28,050 sqft

350-acre business park with office spaces in Newark, Delaware.

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Three-Story Main Street Office
Three-Story Main Street Office

77 E Main St, Newark, DE 19711

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11,578 sqft

Office space with multiple offices, a loft, kitchen, and two full baths in the University of Delaware campus area.

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Medical Office Building
Medical Office Building

650 Naamans Rd, Claymont, DE 19703

Contact for pricing
76,331 sqft

Anchored by CD Diagnostics with a lease extended through 2031, following $2.4M in recent capital improvements.

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Medical Office Shell with Two-Story Atrium
Medical Office Shell with Two-Story Atrium

774 Christiana Rd, Newark, DE 19713

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5,000 sqft

Shell medical office with a two-story atrium and elevator service, supported by 400+ parking spaces.

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New Castle County, DE Office Buildings Market Trends and Statistics

Explore 32 office buildings for sale in New Castle County, DE, showcased through 32 active listings on our real estate platform. These investment opportunities span a total of 675,666 square feet of properties for sale, with an estimated market value of $10,964,700.

Sale prices for commercial office buildings in New Castle County, DE start at $695,000, averaging $1,218,300, and reaching up to $3,200,000 — 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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