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400 Westlake Avenue North, Seattle, WA 98109

Office space available for rent in Seattle, Washington.

Space Size4,779 SF - 18,074 SF
Days on Market275

Property Features for 400 Westlake Avenue North

General Information

Standard status Active
Size 4,779 SF - 18,074 SF
Property subtype Office

Spaces For Lease

at 400 Westlake Avenue North Contact us

10th Floor

Size
15,259 SF
Type
Office Building
Term
Negotiable
Rate
Contact for pricing
Contact us

11th Floor

Size
15,259 SF
Type
Office Building
Term
Negotiable
Rate
Contact for pricing
Contact us

12th Floor

Size
15,259 SF
Type
Office Building
Term
Negotiable
Rate
Contact for pricing
Contact us

13th Floor

Size
15,259 SF
Type
Office Building
Term
Negotiable
Rate
Contact for pricing
Contact us

14th Floor

Size
15,578 SF
Type
Office Building
Term
Negotiable
Rate
Contact for pricing
Contact us

15th Floor

Size
4,779 SF
Type
Office Building
Term
Negotiable
Rate
Contact for pricing
Contact us

2nd Floor

Size
17,841 SF
Type
Office Building
Term
Negotiable
Rate
Contact for pricing
Contact us

3rd Floor

Size
18,074 SF
Type
Office Building
Term
Negotiable
Rate
Contact for pricing
Contact us

4th Floor

Size
16,043 SF
Type
Office Building
Term
Negotiable
Rate
Contact for pricing
Contact us

5th Floor

Size
16,362 SF
Type
Office Building
Term
Negotiable
Rate
Contact for pricing
Contact us

6th Floor

Size
16,043 SF
Type
Office Building
Term
Negotiable
Rate
Contact for pricing
Contact us

7th Floor

Size
15,803 SF
Type
Office Building
Term
Negotiable
Rate
Contact for pricing
Contact us

8th Floor

Size
15,259 SF
Type
Office Building
Term
Negotiable
Rate
Contact for pricing
Contact us

9th Floor

Size
15,578 SF
Type
Office Building
Term
Negotiable
Rate
Contact for pricing
Contact us
Listing Agency: Newmark
Listed By: Cavan O'Keefe · License #26433
Source: Nmrk
Added: Nov 23, 2025 Changed: Aug 23 Last Checked: Aug 24 at 5:00AM

Displayed information is deemed reliable but is not guaranteed and should be independently verified. All listing content including descriptions, pricing, images are the copyrighted material of Newmark

Investment Insights

Based on property information with market context.

This property offers office space for rent in Seattle, Washington. The property has a total size of 212396 square feet and multiple configurations are available.

Key Highlights

  • Multiple configurations available
  • Call broker for rates

Property Analytics

Current Use

First Choice Health Physician Seattle Airport Limo Limousine Service

Suggested Use

Top Pick Daycare Center Electrical Service Pet Store Pet Store & Service Auto Parts Store (Bike/Boat/Book/etc) Store

Score = modeled unmet demand for each use within ~1 mi (higher = bigger opportunity). Zoning and permitted uses should be independently verified with local authorities.

Lease Details

NNN (Triple Net)
Lease Type

Location Intelligence

Trade Area within ½ mile

7,918
Businesses Nearby

Demographics for 98109, WA

34,551
Population
23,162
Households
1.5
Avg Household Size
32
Median Age
78%
College-Educated
98%
High-School Grad
1.9 sq mi
ZIP Area
18,185
Density / Sq Mi
$130,845
Median Household Income
$104,202
Median Earnings
$2,329
Median Rent
$986,000
Median Home Value

Market

Lease Benchmarks for Seattle, WA

$28.51 /SF/Yr
Avg Asking Price
$4.18–$53 /SF/Yr
Price Range
11,981 SF
Avg Space Size

Vacancy Rate% for Office in Seattle, WA

8.5% 2019
13.4% 2020
17.6% 2021
19.5% 2022
24.3% 2023
30% 2024
32.3% 2025
Rey
Questions? Ask Rey
Realmo’s AI knows this listing — price, zoning, demand, history. Ask anything.

Frequently Asked Questions

What type of property is this?
Office units - Office space available for rent in Seattle, Washington.
Where is this office units located?
The property is located at 400 Westlake Avenue North Seattle, WA.
What are key features of this property?
This property features: Multiple configurations available; Call broker for rates
More about this property
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