I previously wrote about a housing concept from Stewart Brand’s How Buildings Learn: What happens after they are built. (See Incremental Building and Housing Microfinance Part III, posted on 13th September 2009) Brand built upon work by Frank Duffy and identified “The 6 S’s” of a building: Site, Structure, Skin, Services, Space and Stuff.[1] How the Six S’s are integrated into a building varies, depending on whether the building was constructed through a formal or informal housing process and the degree of access to housing finance. As Brand states, “The flow of money through a building acts to organize that building.”[2]
Let me start with a brief look at the 6 S’s:
- Site: This is the location of a building. In the western setting, it is almost certain to be legally and specifically defined. In other parts of the world, there may be no legal title. Many countries have yet to conduct cadastral surveys for the vast majority of land, making formal title nearly impossible and resulting in alternative forms of land tenure. Site has a tremendous impact on the building process in terms of the eventual form of structure and the availability of housing finance options.
- Structure: Brand writes that “The foundation and load-bearing elements are perilous and expensive to change – so people don’t. These are the building.” [3] The structure of a building is defined by its foundation plan and, as Brand notes, is not likely to be significantly altered. Structure can be added incrementally through additions and extensions, using either formal and informal housing processes.
- Skin: The skin of a building is what meets the eye. It has a functional purpose of protecting the structure and providing insulation, security and safety, but it also frequently has aesthetic purposes. It is not uncommon for waddle and daub traditional houses in Africa to have an extra layer clay added to the outside to protect the structure. This is sometimes painted in designs with different color clays. “Keeping up with the Jones’” knows no socio-economic boundaries and often involves improvements or changes to the skin of a building.
- Services: Services include heating, electrical wiring, gas fittings, plumbing communication or other utilities and services in and around a building. Efforts are often made to hide the majority of services behind the skin of the building with the exception of access points like sockets, plumbing fixtures, etc.
- Space: The space plan includes the non-load bearing walls which delineate how space is used within the structure, as well as elements such as ceilings, doors and windows. Years ago I remember my father taking a sledge hammer and tearing out a wall between our dining room and kitchen to join the rooms and add a wood-burning stove. At the time, I didn’t think of it as a modification of the space plan and addition of a service, but that’s exactly what he was doing.
- Stuff: These are the things we put into the house and usually take with us when we move. Furniture, appliances and personal items all fall into this category. “Stuff” is clearly separate from what we usually consider as the building, but you will almost never see a building that is being utilized without it!
How Buildings Learn addresses the change and adaptation that takes place in a house or structure after it is built. Owners personalize and adapt buildings to their needs and wants over time. Brand uses the 6 S’s as a frame for identifying the types of transitions through which buildings pass. Brand looked at the change process primarily in the context of the formal housing sector. Although there are many similarities, there are also a number of differences when viewed through the lens of informal housing.
The 6 S’s in a formal housing process:
- Instant House: Whether built as new construction or bought as a pre-existing building, all of the 6 S’s (except “stuff”) are usually complete at the time of purchase. The incremental process of change begins after the owner has acquired a complete unit. At the time of sale, one owner’s ending point with a building becomes the next owners starting point, but it almost always starts as a complete unit in terms of the S’s.
- Built to Standards: The S’s themselves are built to standards, with inspection being a requirement. The formal housing process is highly regulated and the builders, sellers and just about everyone involved must be licensed and /or conform to standards. This is in an effort to guarantee quality and safety.
- Financed with Formal Housing Finance: The mortgage market is designed to facilitate the purchase of complete units with repayments over a long period of time. The structure, skin, services and space plan must meet quality standards and there must be legal tenure for the site, because mortgage financing is based on the presumed legal ability to resell the asset (the building) in case of default. Mortgage financing supports the acquisition of the 6’s in one complete unit, but it is also dependent on the ability to do so according to local quality standards and regulations.
- Incremental Construction: Most informal building processes are incremental. The time from the start of construction to when a building is complete with all of the 6 S’s can often be measured in years. Many buildings never have a complete set of the 6 S’s in their entire lifespan. In the incremental building process, structure is king. Buildings often sit on an untitled site and are occupied with incomplete skins, space, services and stuff. The S’s are added for the first time as the building is already in use by the owners.
- Questionable Standards: Even where regulations and standards exist, low income households often cannot afford to comply with them. This results in houses being built outside of standards. Builders are usually people who may have some knowledge of simple construction, but have not received formal training or licensing and are difficult to hold liable for the quality of work. There are few guarantees or avenues for recourse in the case of a poor quality construction.
- Financed Through Informal Sources: Houses built using informal process are commonly built by people who do not qualify for loans from a bank. The site may not be legally viable as collateral and an informal building process undertaken by builders of indeterminate skill may appear risky to conservative bankers. As a result, owners build using whatever sources of finance they can access. This is often self-financing through savings, but could also include small loans from family, friends or places of employment. With the growth of the microfinance industry it is not uncommon for small business loans from MFIs to be diverted into housing. Whatever the source of funds, it tends to be piecemeal and the incremental building process becomes an exercise of prioritizing the 6 S’s and then adding and improving them gradually. The flow of money does indeed determine the building process.
Owners usually don’t choose whether they want to use a formal or informal housing process. The policy, regulatory and finance environments linked with predominant sources and levels of income essentially predetermine the process that will be used in practice and how the 6 S’s will be acquired. How Buildings Learn demonstrates that incremental building is more common than often imagined within the formal housing sector. Although housing microfinance is often thought of as a tool to support informal housing processes, its use in terms of the 6 S's it is not too different from home improvement loans delivered through formal lending institutions to support housing modifications complete with building permits, inspections and qualified builders. When housing microfinance is applied to informal housing processes, however, the effect is to speed up the initial acquisition of the 6 S’s and to allow the dweller to move towards and eventually own a complete building. As Brand showed, however, buildings continue to transform long after initial “completion.”
[2] Brand, p. 85
[3] Brand, p. 13
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