• Foreword
• Executive summary
• The database
• The sample structure
• National average component service charges
• National average component service charges by percentage
• Total service charge by building location and by building size
• Component service charges by building location
• Service charge trends 1983-2006
• Looking to the future
• Definition of terms
• Geographical areas
• Data contributors
• Contact us
• Download OSCAR PDF

The sample structure

The 2007 OSCAR database contains:

• 235 buildings
• 21,433,977 sq ft / (1,991,282 sq m) of total office space
• 167 air-conditioned buildings
• 16,030,060 sq ft / (1,489,241 sq m) of air-conditioned office space
• 68 non air-conditioned buildings
• 5,403,917 sq ft / (502,040 sq m) of non air-conditioned office space
• The annual 'churn' of properties within the database is 46%, which compares to 58% in OSCAR 2006

The analysis in CHARTS 1 to 9 gives an appreciation of the dataset profile by building location, size and age. The key observations from the sample are:

• The non air-conditioned buildings appear to be uniformly represented across all age ranges, however the air-conditioned buildings are pre-dominantly less than 20 years from their last refurbishment or date of construction.
• The non air-conditioned buildings tend to fall within the 3 mid-size ranges, with little representation above 100,000 sq ft. However, the air-conditioned buildings are better represented above 40,000 sq ft. Very few buildings of either type feature below 10,000 sq ft.
• The non air-conditioned buildings are represented fairly uniformly across all geographical regions, whereas the air-conditioned buildings are better represented within central London.
• We have previously observed an increase in the number of airconditioned buildings under ten years of age and a reduction in the number of larger non air-conditioned buildings. Our sample in OSCAR 2007 continues to support the theory that obsolete non air-conditioned stock is being replaced by modern air-conditioned space.

CHART 1 Building location profile - year end 2006

CHART 2 Building size profile - year ended 2006

CHART 3 Building age profile - year end 2006 (time since last refurbishment / construction)

CHART 4 Building location profile

CHART 5 Building location profile by %

CHART 6 Building size profile

CHART 7 Building size profile by %

CHART 8 Building age profile (time since last refurbishment / construction)

CHART 9 Building age profile by % (time since last refurbishment / construction)