Tromsostan has a varied portfolio of commercial property ranging from garage blocks to bus depots with many office blocks and warehouses in between. The areas Tromsostan covers are: Hayes, Middlesex, Orpington, Petts Wood, Sevenoaks, Hildenborough, Tenterdon and Rainham.

International House- Cray Avenue International House was originally purchased by Dennis Brown in 1975 as home to his then company Neilcott Construction. Dennis sold Neilcott Construction in 1986 and International House was then split into separate offices, suites and Commercial Units. International House is now a successful Business Centre and home to numerous businesses.	International House
Strålfors This building has also been in Tromsostan's portfolio since 1975 as well, it is currently let to Strålfors with a floor area of approximately 1600 square metres.	Strålfors
Bus Depot - Dial A Ride This building has been in Tromsostan's portfolio since 1975. It is currently being let to transport for London. The site covers an area of approximately 2600 square metres.	Bus Depot
Hildenborough Land Tromsostan also purchases land like this with a view of obtaining planning permission and then selling the site on for a profit. This land is currently being considered for a dog rescue sanctuary.	Hildenborough Land
Pittlesden Barn The National Farmers Union have been in Pittlesden Barn since 2000 and Tromsostan have owned it since 1995.	Pittlesden Barn
Lakehurst Tenterden Complex The cats protection league have leased this shop for the last couple of years. Tromsostan has owned the property since 1995. Next door John Mills has run a successful development company from here since 2000 now and Tromsostan have owned this property since 1995.	Cats Protection League
Petts Wood - Shop Fronted Property This shop front property was purchased in 2003 with the benefit of having 'Wade Stevens' a successful solicitors practice downstairs and long term tenants in the flat above.	Wade Stevens
Village Store Eynsford This village store was purchased in 2000 and various tenants have passed through such as Unwins and Threshers.	Threshers