New Castle County, DE Office Spaces for Rent

Find the best New Castle County, DE office space among 488 for rent listings currently on the market.

690 Middletown Odessa Road

690 Middletown Odessa Rd, Middletown, DE
Property

Office

113,000 SF
Availability

8 Spaces

112,996 SF
For Lease Contact for pricing
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Sabre Building - 3rd Floor

4051 Ogletown Stanton Rd, Newark, DE
Property

Office

46,296 SF
Availability

1 Space

22,237 SF
Year Built

1987
For Lease

$25.00/SF/YR
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1117 North Franklin Street

1117 North Franklin Street, Wilmington, DE
Property

Office

1,650 SF
Availability

1 Space

1 SF
For Lease

$18.00/SF/YR
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5811 Kennett Pike

5811 Kennett Pike, Wilmington, DE
Property

Office

4,165 SF
Availability

1 Space

1,545 SF
For Lease Contact for pricing
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104 Quigley Boulevard

104 Quigley Boulevard, New Castle, DE
Property

Office

3,080 SF
Availability

1 Space

3,080 SF
For Lease

$12.00/SF/YR
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102 Sleepy Hollow Dr, Middletown, DE

102 Sleepy Hollow, Middletown, DE
Property

Office

20,853 SF
Availability

1 Space

1,561 SF
Year Built

2004
For Lease

$21.50/SF/YR
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Polly Drummond Shopping Center

4 Polly Drummond Shopping Center, Newark, DE
Property

Retail

86,802 SF
Availability

1 Space

11,168 SF
Year Built

1971
For Lease Contact for pricing
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Riverside Medical Complex

700 W. Lea Boulevard, Wilmington, DE
Property

Office

35,198 SF
Availability

7 Spaces

8,819 SF
For Lease

$17.50/SF/YR
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2505 Pennsylvania Ave

2505 Pennsylvania Ave, Wilmington, DE
Property

Office

31,000 SF
Availability

1 Space

30,000 SF
For Lease Contact for pricing
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221 N Broad St

221 N Broad St, Middletown, DE
Property

Office

3,850 SF
Availability

1 Space

3,850 SF
For Lease Contact for pricing
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New Castle County, DE Office Inventory Breakdown

There are a number of factors that make a city attractive for businesses to relocate or expand, as well as for investors to enhance their portfolios through local acquisitions. Among the most important factors to consider are the size and quality of the local office market, which is an essential component of the local economy.

Total Office Space in Delaware: 28,159,877 Sq. Ft.

In 2025 the Delaware office market encompassed 28,159,877 square feet of space. Out of that total, 4,922,350 square feet were in office properties sized between 500,000 and 1,000,000 square feet. Meanwhile, 4,904,440 square feet were in office buildings sized between 50,000 and 100,000 square feet.
Class A office space makes up a 31.71% share of Delaware office inventory, while Class B office assets represent roughly 63.13% of the market total.

Delaware Office Market Breakdown by Building Size
Building Size Range	Total Square Feet	Share of Total Office
50k to 100k Sq. Ft.	4,904,440 Sq. Ft.	17.42%
100k to 500k Sq. Ft.	15,129,441 Sq. Ft.	53.73%
500k to 1M Sq. Ft.	4,922,350 Sq. Ft.	17.48%
> 1M Sq. Ft.	1,031,503 Sq. Ft.	3.66%

Delaware Office Market Breakdown by Building Quality Rating
Class	Total Square Feet	Share of Total Office
Class A	8,928,782 Sq. Ft.	31.71%
Class B	17,777,651 Sq. Ft.	63.13%
Class C	1,453,444 Sq. Ft.	5.16%

Data was provided by CommercialEdge, refers to properties larger than 50,000 square feet.

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New Castle County, DE Office Spaces for Rent

690 Middletown Odessa Road

Sabre Building - 3rd Floor

1117 North Franklin Street

5811 Kennett Pike

104 Quigley Boulevard

102 Sleepy Hollow Dr, Middletown, DE

Polly Drummond Shopping Center

Riverside Medical Complex

2505 Pennsylvania Ave

221 N Broad St

New Castle County, DE Office Inventory Breakdown

Total Office Space in Delaware: 28,159,877 Sq. Ft.

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