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1666 Connecticut Ave NW 1666 Connecticut Ave NW 1,700 - 18,999 SF of Office Space Available in Washington, DC 20009
All Available Spaces(7)
Display Rental Rate as
- Space
- Size
- Term
- Rental Rate
- Space Use
- Build-Out
- Available
New conference facility + tenant lounge coming soon • Iconic presence on the Connecticut Avenue corridor — two blocks from Dupont Metro Station • Boutique floor plate with great setbacks and windowline in all directions • Three levels of below-grade parking – 1/1,500 SF ratio • Sette Osteria on-site & exciting new retail coming soon
- Rate includes utilities, building services and property expenses
- Office intensive layout
- Fully Built-Out as Standard Office
- Can be combined with additional space(s) for up to 6,399 SF of adjacent space
Space on the front corner of the second floor overlooking Connecticut Avenue with direct elevator exposure. Available 4/2026 and can be combined with Suite 200. New conference facility + tenant lounge coming soon • Iconic presence on the Connecticut Avenue corridor — two blocks from Dupont Metro Station • Boutique floor plate with great setbacks and windowline in all directions • Three levels of below-grade parking – 1/1,500 SF ratio • Sette Osteria on-site & exciting new retail coming soon
- Rate includes utilities, building services and property expenses
- Can be combined with additional space(s) for up to 6,399 SF of adjacent space
- Office intensive layout
Full floor of spec suites with conference facility and tenant lounge coming soon to the third floor! Suites as small as ~1,500 RSF will be available in Q1 2026! Brand new suites and common areas designed by OTJ. New conference facility + tenant lounge coming soon • Iconic presence on the Connecticut Avenue corridor — two blocks from Dupont Metro Station • Boutique floor plate with great setbacks and windowline in all directions • Three levels of below-grade parking – 1/1,500 SF ratio • Sette Osteria on-site & exciting new retail coming soon
- Rate includes utilities, building services and property expenses
- Space is in Excellent Condition
- Office intensive layout
- Can be combined with additional space(s) for up to 12,600 SF of adjacent space
Full floor of spec suites with conference facility and tenant lounge coming soon to the third floor! Suites as small as ~1,500 RSF will be available in Q1 2026! Brand new suites and common areas designed by OTJ. New conference facility + tenant lounge coming soon • Iconic presence on the Connecticut Avenue corridor — two blocks from Dupont Metro Station • Boutique floor plate with great setbacks and windowline in all directions • Three levels of below-grade parking – 1/1,500 SF ratio • Sette Osteria on-site & exciting new retail coming soon
- Rate includes utilities, building services and property expenses
- Space is in Excellent Condition
- Office intensive layout
- Can be combined with additional space(s) for up to 12,600 SF of adjacent space
Full floor of spec suites with conference facility and tenant lounge coming soon to the third floor! Suites as small as ~1,500 RSF will be available in Q1 2026! Brand new suites and common areas designed by OTJ. New conference facility + tenant lounge coming soon • Iconic presence on the Connecticut Avenue corridor — two blocks from Dupont Metro Station • Boutique floor plate with great setbacks and windowline in all directions • Three levels of below-grade parking – 1/1,500 SF ratio • Sette Osteria on-site & exciting new retail coming soon
- Rate includes utilities, building services and property expenses
- Space is in Excellent Condition
- Office intensive layout
- Can be combined with additional space(s) for up to 12,600 SF of adjacent space
Full floor of spec suites with conference facility and tenant lounge coming soon to the third floor! Suites as small as ~1,500 RSF will be available in Q1 2026! Brand new suites and common areas designed by OTJ. New conference facility + tenant lounge coming soon • Iconic presence on the Connecticut Avenue corridor — two blocks from Dupont Metro Station • Boutique floor plate with great setbacks and windowline in all directions • Three levels of below-grade parking – 1/1,500 SF ratio • Sette Osteria on-site & exciting new retail coming soon
- Rate includes utilities, building services and property expenses
- Space is in Excellent Condition
- Office intensive layout
- Can be combined with additional space(s) for up to 12,600 SF of adjacent space
Full floor of spec suites with conference facility and tenant lounge coming soon to the third floor! Suites as small as ~1,500 RSF will be available in Q1 2026! Brand new suites and common areas designed by OTJ. New conference facility + tenant lounge coming soon • Iconic presence on the Connecticut Avenue corridor — two blocks from Dupont Metro Station • Boutique floor plate with great setbacks and windowline in all directions • Three levels of below-grade parking – 1/1,500 SF ratio • Sette Osteria on-site & exciting new retail coming soon
- Rate includes utilities, building services and property expenses
- Space is in Excellent Condition
- Office intensive layout
- Can be combined with additional space(s) for up to 12,600 SF of adjacent space
| Space | Size | Term | Rental Rate | Space Use | Build-Out | Available |
| 2nd Floor, Ste 200 | 1,875 SF | Negotiable | $49.75 /SF/YR $4.15 /SF/MO $93,281 /YR $7,773 /MO | Office | Full Build-Out | Now |
| 2nd Floor, Ste 201 | 4,524 SF | Negotiable | $49.75 /SF/YR $4.15 /SF/MO $225,069 /YR $18,756 /MO | Office | Full Build-Out | Now |
| 3rd Floor, Ste 300-A | 3,700 SF | Negotiable | $49.75 /SF/YR $4.15 /SF/MO $184,075 /YR $15,340 /MO | Office | Spec Suite | Now |
| 3rd Floor, Ste 300-B | 1,700 SF | Negotiable | $49.75 /SF/YR $4.15 /SF/MO $84,575 /YR $7,048 /MO | Office | Spec Suite | Now |
| 3rd Floor, Ste 300-C | 2,500 SF | Negotiable | $49.75 /SF/YR $4.15 /SF/MO $124,375 /YR $10,365 /MO | Office | Spec Suite | Now |
| 3rd Floor, Ste 300-D | 2,500 SF | Negotiable | $49.75 /SF/YR $4.15 /SF/MO $124,375 /YR $10,365 /MO | Office | Spec Suite | Now |
| 3rd Floor, Ste 300-E | 2,200 SF | Negotiable | $49.75 /SF/YR $4.15 /SF/MO $109,450 /YR $9,121 /MO | Office | Spec Suite | Now |
2nd Floor, Ste 200
| Size |
| 1,875 SF |
| Term |
| Negotiable |
| Rental Rate |
| $49.75 /SF/YR $4.15 /SF/MO $93,281 /YR $7,773 /MO |
| Space Use |
| Office |
| Build-Out |
| Full Build-Out |
| Available |
| Now |
2nd Floor, Ste 201
| Size |
| 4,524 SF |
| Term |
| Negotiable |
| Rental Rate |
| $49.75 /SF/YR $4.15 /SF/MO $225,069 /YR $18,756 /MO |
| Space Use |
| Office |
| Build-Out |
| Full Build-Out |
| Available |
| Now |
3rd Floor, Ste 300-A
| Size |
| 3,700 SF |
| Term |
| Negotiable |
| Rental Rate |
| $49.75 /SF/YR $4.15 /SF/MO $184,075 /YR $15,340 /MO |
| Space Use |
| Office |
| Build-Out |
| Spec Suite |
| Available |
| Now |
3rd Floor, Ste 300-B
| Size |
| 1,700 SF |
| Term |
| Negotiable |
| Rental Rate |
| $49.75 /SF/YR $4.15 /SF/MO $84,575 /YR $7,048 /MO |
| Space Use |
| Office |
| Build-Out |
| Spec Suite |
| Available |
| Now |
3rd Floor, Ste 300-C
| Size |
| 2,500 SF |
| Term |
| Negotiable |
| Rental Rate |
| $49.75 /SF/YR $4.15 /SF/MO $124,375 /YR $10,365 /MO |
| Space Use |
| Office |
| Build-Out |
| Spec Suite |
| Available |
| Now |
3rd Floor, Ste 300-D
| Size |
| 2,500 SF |
| Term |
| Negotiable |
| Rental Rate |
| $49.75 /SF/YR $4.15 /SF/MO $124,375 /YR $10,365 /MO |
| Space Use |
| Office |
| Build-Out |
| Spec Suite |
| Available |
| Now |
3rd Floor, Ste 300-E
| Size |
| 2,200 SF |
| Term |
| Negotiable |
| Rental Rate |
| $49.75 /SF/YR $4.15 /SF/MO $109,450 /YR $9,121 /MO |
| Space Use |
| Office |
| Build-Out |
| Spec Suite |
| Available |
| Now |
2nd Floor, Ste 200
| Size | 1,875 SF |
| Term | Negotiable |
| Rental Rate | $49.75 /SF/YR |
| Space Use | Office |
| Build-Out | Full Build-Out |
| Available | Now |
New conference facility + tenant lounge coming soon • Iconic presence on the Connecticut Avenue corridor — two blocks from Dupont Metro Station • Boutique floor plate with great setbacks and windowline in all directions • Three levels of below-grade parking – 1/1,500 SF ratio • Sette Osteria on-site & exciting new retail coming soon
- Rate includes utilities, building services and property expenses
- Fully Built-Out as Standard Office
- Office intensive layout
- Can be combined with additional space(s) for up to 6,399 SF of adjacent space
2nd Floor, Ste 201
| Size | 4,524 SF |
| Term | Negotiable |
| Rental Rate | $49.75 /SF/YR |
| Space Use | Office |
| Build-Out | Full Build-Out |
| Available | Now |
Space on the front corner of the second floor overlooking Connecticut Avenue with direct elevator exposure. Available 4/2026 and can be combined with Suite 200. New conference facility + tenant lounge coming soon • Iconic presence on the Connecticut Avenue corridor — two blocks from Dupont Metro Station • Boutique floor plate with great setbacks and windowline in all directions • Three levels of below-grade parking – 1/1,500 SF ratio • Sette Osteria on-site & exciting new retail coming soon
- Rate includes utilities, building services and property expenses
- Office intensive layout
- Can be combined with additional space(s) for up to 6,399 SF of adjacent space
3rd Floor, Ste 300-A
| Size | 3,700 SF |
| Term | Negotiable |
| Rental Rate | $49.75 /SF/YR |
| Space Use | Office |
| Build-Out | Spec Suite |
| Available | Now |
Full floor of spec suites with conference facility and tenant lounge coming soon to the third floor! Suites as small as ~1,500 RSF will be available in Q1 2026! Brand new suites and common areas designed by OTJ. New conference facility + tenant lounge coming soon • Iconic presence on the Connecticut Avenue corridor — two blocks from Dupont Metro Station • Boutique floor plate with great setbacks and windowline in all directions • Three levels of below-grade parking – 1/1,500 SF ratio • Sette Osteria on-site & exciting new retail coming soon
- Rate includes utilities, building services and property expenses
- Office intensive layout
- Space is in Excellent Condition
- Can be combined with additional space(s) for up to 12,600 SF of adjacent space
3rd Floor, Ste 300-B
| Size | 1,700 SF |
| Term | Negotiable |
| Rental Rate | $49.75 /SF/YR |
| Space Use | Office |
| Build-Out | Spec Suite |
| Available | Now |
Full floor of spec suites with conference facility and tenant lounge coming soon to the third floor! Suites as small as ~1,500 RSF will be available in Q1 2026! Brand new suites and common areas designed by OTJ. New conference facility + tenant lounge coming soon • Iconic presence on the Connecticut Avenue corridor — two blocks from Dupont Metro Station • Boutique floor plate with great setbacks and windowline in all directions • Three levels of below-grade parking – 1/1,500 SF ratio • Sette Osteria on-site & exciting new retail coming soon
- Rate includes utilities, building services and property expenses
- Office intensive layout
- Space is in Excellent Condition
- Can be combined with additional space(s) for up to 12,600 SF of adjacent space
3rd Floor, Ste 300-C
| Size | 2,500 SF |
| Term | Negotiable |
| Rental Rate | $49.75 /SF/YR |
| Space Use | Office |
| Build-Out | Spec Suite |
| Available | Now |
Full floor of spec suites with conference facility and tenant lounge coming soon to the third floor! Suites as small as ~1,500 RSF will be available in Q1 2026! Brand new suites and common areas designed by OTJ. New conference facility + tenant lounge coming soon • Iconic presence on the Connecticut Avenue corridor — two blocks from Dupont Metro Station • Boutique floor plate with great setbacks and windowline in all directions • Three levels of below-grade parking – 1/1,500 SF ratio • Sette Osteria on-site & exciting new retail coming soon
- Rate includes utilities, building services and property expenses
- Office intensive layout
- Space is in Excellent Condition
- Can be combined with additional space(s) for up to 12,600 SF of adjacent space
3rd Floor, Ste 300-D
| Size | 2,500 SF |
| Term | Negotiable |
| Rental Rate | $49.75 /SF/YR |
| Space Use | Office |
| Build-Out | Spec Suite |
| Available | Now |
Full floor of spec suites with conference facility and tenant lounge coming soon to the third floor! Suites as small as ~1,500 RSF will be available in Q1 2026! Brand new suites and common areas designed by OTJ. New conference facility + tenant lounge coming soon • Iconic presence on the Connecticut Avenue corridor — two blocks from Dupont Metro Station • Boutique floor plate with great setbacks and windowline in all directions • Three levels of below-grade parking – 1/1,500 SF ratio • Sette Osteria on-site & exciting new retail coming soon
- Rate includes utilities, building services and property expenses
- Office intensive layout
- Space is in Excellent Condition
- Can be combined with additional space(s) for up to 12,600 SF of adjacent space
3rd Floor, Ste 300-E
| Size | 2,200 SF |
| Term | Negotiable |
| Rental Rate | $49.75 /SF/YR |
| Space Use | Office |
| Build-Out | Spec Suite |
| Available | Now |
Full floor of spec suites with conference facility and tenant lounge coming soon to the third floor! Suites as small as ~1,500 RSF will be available in Q1 2026! Brand new suites and common areas designed by OTJ. New conference facility + tenant lounge coming soon • Iconic presence on the Connecticut Avenue corridor — two blocks from Dupont Metro Station • Boutique floor plate with great setbacks and windowline in all directions • Three levels of below-grade parking – 1/1,500 SF ratio • Sette Osteria on-site & exciting new retail coming soon
- Rate includes utilities, building services and property expenses
- Office intensive layout
- Space is in Excellent Condition
- Can be combined with additional space(s) for up to 12,600 SF of adjacent space
Features and Amenities
- Food Service
- Property Manager on Site
- Restaurant
- Central Heating
- Natural Light
- Air Conditioning
Property Facts
