Aircastle Ltd. is expanding its Stamford offices by nearly one third to 19,000 square feet.

The company leases jet aircraft to airlines, with customers including British Airways and Southwest Airlines.
Aircastle occupies space at 300 First Stamford Place, located in a city enterprise zone in which tenants can qualify for a five-year, 80-percent abatement on real estate and capital taxes. The company also has offices in Dublin and Singapore.

Over the first six months of 2007, Aircastle had a $60 million profit on $155 million in revenue.

At last report, Aircastle owned or had commitments to purchase aircraft valued at $5.5 billion. In early September, the company reached a deal to buy four Boeing 747 jets from Shanghai Airlines.