which by definition increases the price in a significant way (68.46% or 139,304.64 €), is an attic
flat (8.12% or 16,529.12 €), has one extra bathroom (12.63% or 16,409.62 €) or private parking
(10.69% or 9,887.85 €). Other attributes or services, such as a caretaker (4.86% or 9,887.85 €)
or elevator (4.81% or 9,779.49 €), have less value. It is also worth noting that the market
positively values a dwelling in a good condition and ready to move in (4.14% or 8,426.22 €).
The marginal contribution to house pricing of the surface area (0.37% or 608.41 €), as
well as the number of bathrooms is conditioned by the fact that, although their contribution to
the price is positive, it is so at a diminishing rate since the marginal value of an additional unit of
surface area (1 m2 more) or bathroom (1 extra bathroom) decreases as their number increases.
This is shown in Table 4 as the marginal values of the percentage variations in housing prices
for different values of the variables analyzed. The rest remains constant.
TABLE 4 Variations in housing prices for different values of surface area and number of bathrooms | ||||||
Surface area m2 |
21 |
75 |
125 |
175 |
225 |
300 |
Effect of the number of m2 |
0.0043 |
0.0039 |
0.0036 |
0.0033 |
0.0030 |
0.0026 |
on the housing price. | ||||||
Number of bathrooms |
1 |
2 |
3 |
4 |
5 |
6 |
Effect of number of bathrooms |
0.1438 |
0.1155 |
0.0872 |
0.0590 |
0.0307 |
0.0024 |
on the housing price. |
Note that as the quantity increases (m2 or bathrooms) the increasing percentage in the
housing price decreases.
On the other hand, regarding location attributes, the most valued districts in Malaga city
are district 2 (eastern area of the city) (15.38% or 31,284.45 €) with very high socioeconomic
conditions and, second, but at a great distance, district 10 which is a growing area (3.32% or
6.902,43 €). Among the attributes negatively valued by the market, the most significant is
having little natural light (-16.28% or 33.122,16 €) which considerably lowers the market value
of the dwelling. The need for refurbishment due to a generally poor state (-9.04% or 18.399,10
€), or due to the age of the building (-0.25% or 514.59 €), and the fact of being located in a