Property, Plant and Equipment Disclosure
Asset Age Ratios (Summary)
Average Age
Estimated Total Useful Life
Estimated Age, Time Elapsed Since Purchase
Estimated Remaining Life

CoStar Group Inc., balance sheet: property, plant and equipment

US$ in thousands

	Dec 31, 2022	Dec 31, 2021	Dec 31, 2020	Dec 31, 2019	Dec 31, 2018
Leasehold improvements	108,901)	75,634)	80,963)	73,918)	65,332)
Furniture, office equipment and vehicles	52,610)	47,540)	68,587)	60,768)	50,224)
Computer hardware and software	43,830)	30,179)	86,755)	80,947)	74,742)
Aircrafts	44,209)	68,670)	28,561)	27,657)	2,796)
Land	52,227)	38,774)	24,642)	—)	—)
Buildings	105,060)	96,496)	2,970)	—)	—)
Property and equipment, gross	406,837)	357,293)	292,478)	243,290)	193,094)
Accumulated depreciation and amortization	(85,587)	(85,862)	(166,153)	(135,761)	(109,791)
Property and equipment, net	321,250)	271,431)	126,325)	107,529)	83,303)

Based on: 10-K (reporting date: 2022-12-31), 10-K (reporting date: 2021-12-31), 10-K (reporting date: 2020-12-31), 10-K (reporting date: 2019-12-31), 10-K (reporting date: 2018-12-31).

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Item	Description	The company
Property and equipment, gross	Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.	CoStar Group Inc. property and equipment, gross increased from 2020 to 2021 and from 2021 to 2022.
Property and equipment, net	Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.	CoStar Group Inc. property and equipment, net increased from 2020 to 2021 and from 2021 to 2022.

CoStar Group Inc., asset age ratios

	Dec 31, 2022	Dec 31, 2021	Dec 31, 2020	Dec 31, 2019	Dec 31, 2018
Average age ratio	24.14%	26.96%	62.04%	55.80%	56.86%
Estimated total useful life (years)	12	11	9	9	7
Estimated age, time elapsed since purchase (years)	3	3	6	5	4
Estimated remaining life (years)	9	8	4	4	3

Based on: 10-K (reporting date: 2022-12-31), 10-K (reporting date: 2021-12-31), 10-K (reporting date: 2020-12-31), 10-K (reporting date: 2019-12-31), 10-K (reporting date: 2018-12-31).

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Asset age ratio	Description	The company
Average age ratio	As long as straight-line depreciation is used, this is an accurate estimate of asset age as a percentage of depreciable life. The relative age is a useful measure of whether the company fixed asset base is old or new. Newer assets are likely to be more efficient.	CoStar Group Inc. average age ratio of depreciable property, plant and equipment improved from 2020 to 2021 and from 2021 to 2022.
Estimated total useful life	Over longer time periods, this ratio is a useful measure of company depreciation policy and can be used for comparisons with competitors.	CoStar Group Inc. estimated total useful life of depreciable property, plant and equipment increased from 2020 to 2021 and from 2021 to 2022.
Estimated time elapsed since purchase	The approximate age in years of a company fixed assets. Useful for comparison purposes.	CoStar Group Inc. estimated time elapsed since purchase of depreciable property, plant and equipment improved from 2020 to 2021 and from 2021 to 2022.
Estimated remaining life		CoStar Group Inc. estimated remaining life of depreciable property, plant and equipment increased from 2020 to 2021 and from 2021 to 2022.

	Dec 31, 2022	Dec 31, 2021	Dec 31, 2020	Dec 31, 2019	Dec 31, 2018
Selected Financial Data (US$ in thousands)
Accumulated depreciation and amortization	85,587)	85,862)	166,153)	135,761)	109,791)
Property and equipment, gross	406,837)	357,293)	292,478)	243,290)	193,094)
Land	52,227)	38,774)	24,642)	—)	—)
Asset Age Ratio
Average age¹	24.14%	26.96%	62.04%	55.80%	56.86%

Based on: 10-K (reporting date: 2022-12-31), 10-K (reporting date: 2021-12-31), 10-K (reporting date: 2020-12-31), 10-K (reporting date: 2019-12-31), 10-K (reporting date: 2018-12-31).

2022 Calculations

¹ Average age = 100 × Accumulated depreciation and amortization ÷ (Property and equipment, gross – Land)
= 100 × 85,587 ÷ (406,837 – 52,227) = 24.14%

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Asset age ratio	Description	The company
Average age	As long as straight-line depreciation is used, this is an accurate estimate of asset age as a percentage of depreciable life. The relative age is a useful measure of whether the company fixed asset base is old or new. Newer assets are likely to be more efficient.	CoStar Group Inc. average age ratio of depreciable property, plant and equipment improved from 2020 to 2021 and from 2021 to 2022.

	Dec 31, 2022	Dec 31, 2021	Dec 31, 2020	Dec 31, 2019	Dec 31, 2018
Selected Financial Data (US$ in thousands)
Property and equipment, gross	406,837)	357,293)	292,478)	243,290)	193,094)
Land	52,227)	38,774)	24,642)	—)	—)
Depreciation expense for property and equipment	29,100)	29,000)	28,800)	26,000)	26,000)
Asset Age Ratio (Years)
Estimated total useful life¹	12	11	9	9	7

Based on: 10-K (reporting date: 2022-12-31), 10-K (reporting date: 2021-12-31), 10-K (reporting date: 2020-12-31), 10-K (reporting date: 2019-12-31), 10-K (reporting date: 2018-12-31).

2022 Calculations

¹ Estimated total useful life = (Property and equipment, gross – Land) ÷ Depreciation expense for property and equipment
= (406,837 – 52,227) ÷ 29,100 = 12

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Asset age ratio	Description	The company
Estimated total useful life	Over longer time periods, this ratio is a useful measure of company depreciation policy and can be used for comparisons with competitors.	CoStar Group Inc. estimated total useful life of depreciable property, plant and equipment increased from 2020 to 2021 and from 2021 to 2022.

	Dec 31, 2022	Dec 31, 2021	Dec 31, 2020	Dec 31, 2019	Dec 31, 2018
Selected Financial Data (US$ in thousands)
Accumulated depreciation and amortization	85,587)	85,862)	166,153)	135,761)	109,791)
Depreciation expense for property and equipment	29,100)	29,000)	28,800)	26,000)	26,000)
Asset Age Ratio (Years)
Time elapsed since purchase¹	3	3	6	5	4

Based on: 10-K (reporting date: 2022-12-31), 10-K (reporting date: 2021-12-31), 10-K (reporting date: 2020-12-31), 10-K (reporting date: 2019-12-31), 10-K (reporting date: 2018-12-31).

2022 Calculations

¹ Time elapsed since purchase = Accumulated depreciation and amortization ÷ Depreciation expense for property and equipment
= 85,587 ÷ 29,100 = 3

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Asset age ratio	Description	The company
Estimated time elapsed since purchase	The approximate age in years of a company fixed assets. Useful for comparison purposes.	CoStar Group Inc. estimated time elapsed since purchase of depreciable property, plant and equipment improved from 2020 to 2021 and from 2021 to 2022.

	Dec 31, 2022	Dec 31, 2021	Dec 31, 2020	Dec 31, 2019	Dec 31, 2018
Selected Financial Data (US$ in thousands)
Property and equipment, net	321,250)	271,431)	126,325)	107,529)	83,303)
Land	52,227)	38,774)	24,642)	—)	—)
Depreciation expense for property and equipment	29,100)	29,000)	28,800)	26,000)	26,000)
Asset Age Ratio (Years)
Estimated remaining life¹	9	8	4	4	3

Based on: 10-K (reporting date: 2022-12-31), 10-K (reporting date: 2021-12-31), 10-K (reporting date: 2020-12-31), 10-K (reporting date: 2019-12-31), 10-K (reporting date: 2018-12-31).

2022 Calculations

¹ Estimated remaining life = (Property and equipment, net – Land) ÷ Depreciation expense for property and equipment
= (321,250 – 52,227) ÷ 29,100 = 9

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Asset age ratio	Description	The company
Estimated remaining life		CoStar Group Inc. estimated remaining life of depreciable property, plant and equipment increased from 2020 to 2021 and from 2021 to 2022.

CoStar Group Inc. (NASDAQ:CSGP)

Analysis of Property, Plant and Equipment

Property, Plant and Equipment Disclosure

Asset Age Ratios (Summary)

Average Age

Estimated Total Useful Life

Estimated Age, Time Elapsed since Purchase

Estimated Remaining Life