Comparable sales approach

Comparable Sales Approach - The comparable sales approach is a valuation method regulated by the Real Estate Valuation Ordinance (ImmoWertV, § 15), in which the market value of a property is derived from the actual sale prices of comparable properties. It is considered the most market-oriented of the three standardized methods and is primarily used for condominiums, undeveloped land, and townhouses.

How does the comparative value method work?

The basic principle of the comparative value method is simple: The value of a property is determined based on actual sales prices of similar properties that were sold in a comparable location, with comparable features, and within a reasonable timeframe. The primary data source is the Appraisal Committee’s Collection of Purchase Prices, which records all notarized real estate purchase agreements. Suitable comparable properties are selected from this database.

Since no two properties are completely identical, systematic adjustments are made-so-called adjustment coefficients or conversion coefficients. These account for differences in living space, year of construction, standard of finish, floor level, lot size, and other characteristics that influence value. The ImmoWertV stipulates that the comparative prices must be adjusted to the valuation date and to the property characteristics of the property being appraised.

Two variants are distinguished: In the direct comparative value method, there are a sufficient number of purchase prices for directly comparable properties, allowing the market value to be derived directly. In the indirect comparative value method, the appraiser relies on derived comparative data-such as comparative factors from the Appraisal Committee, including property interest rates or building factors. The indirect method is used when there are too few direct comparable transactions available.

The sales comparison approach is considered the most market-oriented method because it is based directly on actual market activity. However, it requires that a sufficient number of comparable transactions be available. It reaches its limits with specialty properties, commercial properties, or highly unique buildings-in these cases, the income approach or the cost approach is used.

Distinction from the Income Approach and Cost Approach

The comparative market analysis is one of three standardized valuation methods under the ImmoWertV. While the income approach derives a property’s value from the sustainable rental income it can generate and is primarily used for investment properties such as apartment buildings and commercial real estate, the cost approach is based on the building’s construction costs minus depreciation and is particularly suitable for owner-occupied single-family homes.

In practice, experienced appraisers often combine several methods and weight the results according to property type and market conditions. For condominiums in urban locations-the most common application-the comparative value method is, however, almost always used as the primary method because the data available from the purchase price database is typically very robust in these cases.

Typical Adjustment Factors in the Comparative Market Approach

To ensure that comparable properties that are not identical to the subject property can be meaningfully used, the appraiser works with defined adjustment factors. The most important ones are:

Time Adjustment: Past purchase prices are extrapolated to the current valuation date using a market adjustment coefficient. In a rapidly rising market (such as Nuremberg in 2016-2022), even transactions from two years ago may show significant deviations from the current market level and must be adjusted accordingly.

Location-based adjustment: Even within the same neighborhood, individual streets or blocks may have different valuation standards. The Appraisal Committee publishes so-called standard land values, which serve as the basis for location-based adjustments.

Quality-based adjustment: Differences in finish standards, energy efficiency, or floor plan quality are reflected through surcharges or discounts. A newly renovated apartment with underfloor heating and a new built-in kitchen justifies a premium over an unrenovated comparable apartment, based on the actual renovation costs and the value-relevance of the individual measures.

Practical Tip for Owners in Nuremberg and Franconia

In the Nuremberg metropolitan region, the comparative value method is particularly well-suited because the City of Nuremberg’s Appraisal Committee maintains an extensive collection of purchase prices and regularly publishes current market reports with comparative factors. For condominiums in sought-after neighborhoods such as Gostenhof, St. Johannis, the Südstadt, or Maxfeld, sufficient transaction data is available to derive reliable comparative values.

We recommend that owners planning a sale not rely exclusively on online valuation tools. While these tools sometimes use comparative value approaches, they operate with rough average data and can only account for individual characteristics such as the condition of the property, micro-location, or floor level to a limited extent. A professional appraisal, which draws on the purchase price database of the Nuremberg Appraisal Committee, provides a significantly more reliable basis for pricing. Our network supports owners in Nuremberg, Fürth, Erlangen, and the entire region with market-based appraisals.

Frequently Asked Questions

For which types of real estate is the comparative market analysis suitable?

The comparative market analysis is best suited for property types where there are many comparable transactions-particularly condominiums, vacant lots, townhouses, and semi-detached homes. For custom-built single-family homes, historic properties, or commercial real estate, comparability is often limited, which is why the cost approach or income approach is typically used in those cases.

Where do the comparable prices come from?

The primary data source is the purchase price database maintained by the relevant appraisal committee. Every notarized real estate purchase contract is reported to the appraisal committee and recorded there anonymously. From this database, comparable properties with characteristics as similar as possible are selected. Additionally, published comparison factors and market reports from the appraisal committees may be consulted.

How accurate is a valuation using the comparative value method?

Accuracy depends largely on the number and quality of available comparable transactions. In markets with high transaction volume-such as the Nuremberg condominium market-the comparative value method generally yields results that closely reflect market conditions, with deviations typically under 5%. In cases of limited data or highly heterogeneous properties, the range may be wider. The key is the proper selection and adjustment of comparable properties by an experienced appraiser who knows the local market.

Can I apply the comparative value method myself?

In principle, yes, but with significant limitations: As a private individual, you do not have access to the purchase price database of the Appraisal Committee, which is only available to publicly appointed appraisers and government agencies. You can use publicly available asking prices from real estate portals as a rough guide, but you must take into account that asking prices are typically 5-15% higher than actual transaction prices. For a reliable valuation-such as for a divorce, probate proceedings, or financing-an appraisal by a publicly appointed expert or a qualified market value assessment by a local real estate agent is essential.

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