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New Castle County, DE Office Buildings for Sale

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Wilmington, DE Dover, DE Seaford, DE Milford, DE Millsboro, DE Newark, DE Lewes, DE Middletown, DE
60 properties
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Historic Office Building with Flexible Layout
Updated: Aug 3
Historic Office Building with Flexible Layout

501 MAIN STREET, Odessa, DE 19730

$799,900
5,300 sqft
1899 construction date at 501 Main Street, Odessa, DE 19730
Approximately 1,500‑square‑foot walk‑up attic
Newer HVAC systems and newer roof
Reception area, open workspaces, private offices, and conference rooms
On‑site parking with Main Street exposure
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501 MAIN STREET, ODESSA, DE 19730

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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
Over 6,500 SF across three usable levels
3.28‑acre office property in Bear, DE
Brick construction; built in 1751
Private offices, conference rooms, open work areas, and flexible meeting space
Renovated kitchen and lower‑level employee gym
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Three-Building Mixed-Use Assemblage
Three-Building Mixed-Use Assemblage

1719 1719-23 Delaware Ave, Wilmington, DE 19806

$1,450,000
11,376 sqft

Office, retail, salon, and residential components are paired with on-site parking in an urban Wilmington setting.

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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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Mixed-Use Assemblage with Parking
Mixed-Use Assemblage with Parking

171923 DELAWARE AVENUE, Wilmington, DE 19806

$1,450,000
11,376 sqft

Three-building property combines office, retail, salon, and residential components in Wilmington’s Forty Acres neighborhood.

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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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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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Brownstone Office Building
Brownstone Office Building

1104 Philadelphia Pike, Wilmington, DE 19809

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5,920 sqft

The property includes an existing gym, private parking, and a large breakroom.

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Renovated Office/Professional Building
Renovated Office/Professional Building

907 S College Ave, Newark, DE 19713

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2,955 sqft 0.67 AC lot

Office/professional building renovated to code in 2005 on a 2/3-acre site with a DelDot-approved entrance.

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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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Centerville Office Building For Sale
Centerville Office Building For Sale

5809-5811 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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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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Fort DuPont Commercial Opportunity
Fort DuPont Commercial Opportunity

471 Oak Lane, Delaware City, DE 19706

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20,000 sqft

Commercial space in revitalized mixed-use community, Delaware City.

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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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Two-Story Office Building
Two-Story Office Building

1301 - 1303 Milltown Road, Wilmington, DE 19808

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4,200 sqft 0.42 AC lot

Two-story office building with first floor fully rented and second floor available for lease.

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Newark Flex, Lab, Office Facility
Newark Flex, Lab, Office Facility

150 Red Mill Rd, Newark, DE 19711

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60,000 sqft

60,000 SF office, flex, and lab facility with income.

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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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Office Building on College Avenue
Office Building on College Avenue

907 S College Ave, Newark, DE

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2,955 sqft 0.69 AC lot

Office building for sale on busy S. College Avenue.

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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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Newark Office/Industrial Building For Sale
Newark Office/Industrial Building For Sale

211 Lake Dr, Newark, DE 19702

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29,750 sqft

29,750 SF office/industrial building in Pencader Corporate Center.

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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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New Castle County, DE Office Buildings Market Trends and Statistics

Explore 60 office buildings for sale in New Castle County, DE, showcased through 60 active listings on our real estate platform. These investment opportunities span a total of 1,158,432 square feet of properties for sale, with an estimated market value of $10,344,700.

Sale prices for office properties in New Castle County, DE start at $799,900, averaging $1,293,087, 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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