
Figure 1
Matinkylä suburban housing estate in Espoo in the late 1960s: a ‘neo grid plan’ in the making.
Source: Finnish Labour Archives (Työväen arkisto), CC BY-NC-ND 4.0; https://tyark.fi/en/home/.

Figure 2
Floor plan of a lamella building with two lamellas and particularly noticeable transverse room zones (highlighted in one lamella).

Figure 3
Five basic modes of horizontal extendibility of a lamella building.
Note: Extensions are highlighted; modifications to the original building and new spaces are shown in black.

Figure 4
Five selected case blocks and selected case study buildings.

Figure 5
Dwelling distribution in the five case study buildings.

Figure 6
Load-bearing structure: positions of wet spaces (blue) and basic dimensions of the five studied buildings.

Figure 7
Examples of horizontal building extensions in five case study blocks.
Note: Original buildings are presented in dark grey; their extensions in black.

Figure 8
Gaps between buildings that cannot be filled with basic modes of extension (red highlight).
Note: Stairwells are shown in black.

Figure 9
Examples of flat types generated by the five basic modes of extension.
Note: Modifications to the original building are marked in red; other colours indicate the original flat types (the layout is in the top-left corner) and new flats as well as modified original flats (other floor plans). Numbers indicate the number of flats per storey.

Figure 10
Examples of the modified original flats and new flats in the five buildings generated by the basic modes of extension.
Note: Modifications to the original buildings are marked red; selected modified original flats and new flats are coloured.

Figure 11
Original habitable rooms and other spaces affected by the basic modes of extension.
Note: Affected rooms and spaces are hatched.

Figure 12
Flats affected by the basic modes of extension.

Figure 13
Example of gable unit size-modification options.

Figure 14
Example of mid-frame unit size-modification options.

Figure 15
Comparison of size-modification options for the same unit when located in the gable and mid-frame.
