Peters formula

The Peterssche formula is used to estimate the height of the necessary annual maintenance reserve (also called maintenance provision) used by residential buildings. It was determined empirically and is based on the evaluation of statistical data on the maintenance costs of buildings and is therefore an instrument for determining the running costs for maintaining the value of a residential building.

According to this method, the pure production costs (without land or development costs ; see also construction costs ) must be multiplied by a factor of 1.5 and then divided by 80 years. This calculation is based on the assumption that within 80 years 1.5 times the value of the production costs will be incurred for the maintenance of a building.

In the case of buildings divided into apartment ownership , according to Peters, 65 to 70% of the total maintenance costs are attributable to the common property . The rest of 30 to 35% to the individual owners with their respective private property they have to individually pay for their maintenance. Accordingly, the formula can be used to determine the amount of the necessary annual addition to the joint maintenance reserve for condominiums.

Example:

In the following example, production costs of € 1,500 per square meter are assumed. According to the formula, the average annual maintenance costs are calculated as follows:

{\ displaystyle {\ frac {1,500 \ {\ rm {\, \ mathrm {\ euro} \, \, \, \ times \, \, \, 1 {,} 5}}} {80 \ {\ rm { \, Years}}}} = {28 {,} 13 \ {\ rm {\, \ mathrm {\ euro} / year}}}}

Of this amount, 65 to 70% go to the community property. At 70% the following amount results per square meter of living space:

{\ displaystyle {\ frac {28 {,} 13 \ {\ rm {\, \ mathrm {\ euro} \, \, \, \ times \, \, \, 70}}} {100}} = {19 {,} 69 \ {\ rm {\, \ mathrm {\ euro}}}}}

For a building with a total living area of 500 square meters, an annual, joint maintenance reserve of

{\ displaystyle {19 {,} 69 \ {\ rm {\, \ mathrm {\ euro} / m ^ {2} \, \, \, \ times \, \, \, 500 \, m ^ {2} }}} = {9,843 {,} 75 \ {\ rm {\, \ mathrm {\ euro}}}}}

are formed.

Determining the manufacturing costs can be a problem when using the formula. While it can be easily calculated for a newly constructed building, it is difficult to estimate for old buildings. The same applies to the planning of new buildings in the event that the subsequent, continuous load for maintenance is to be determined before the start of construction. There are also regional price differences. These differ considerably in Germany, especially between the old and new federal states. The same applies to Austria and Switzerland.

There are other ways of estimating maintenance costs. A rough rule of thumb states that for new systems an annual allocation to the maintenance reserve of 0.8 to 1.0% of the purchase price from the time of construction is appropriate.

Web links

Law on home ownership and permanent residence rights (WEG) - Section 21, Paragraph 5, No. 4 deals with the maintenance provision.

literature

Bärmann, Pick and Merle: Condominium Act . Munich 1997, p. 605
Heinz Peters: Maintenance and repair of residential property . Bauverlag, Wiesbaden / Berlin 1984, ISBN 3-7625-2222-7
Heinz Peters and Katrin Bauch: The condominium . ISBN 3-923214-48-0
Marcel M. Sauren: The practice encyclopedia of home ownership for administrators, management advisors, and home owners . ISBN 3448041394
Seuss: The condominium . 1993