Mselle , Justine and Sanga, Samwel Alananga
(2018)
Constraints Facing Incremental Housing Construction in Dar es Salaam, Tanzania.
Journal of Construction in Developing Countries , 23 (1).
pp. 1-20.
ISSN 1823-6499
Abstract
The owner-built incremental housing strategy has been used for many years across
the developing world. This study examines the implication of construction constraints and
challenges on annual construction cost expenditure across housing types. Using descriptive
statistics and correlation analysis for 43 incrementally built housing units implemented in Dar
es Salaam between year 1993 and 2013, the study has observed that single and two-storey
incremental housing builders face the same set of human related construction challenges and
external cost-push factors but different administrative, physical and interest related constraints.
Of all the cost-push factors examined, interest rate intervention is the only observed strategy
that has far reaching potentials to single-storey low cost incremental builders because such
builders are less likely to resort to loans as a mechanism to fnance housing. These fndings
suggest that any other external efforts targeting physical or human related incremental
construction constraints are likely to end up either benefting the high quality builders or every
incremental builder regardless of cost or property type or both. The study argues in favour
of targeted interest rate support rather than physical or administrative housing assistance if
owner-builders are to beneft specifcally in any housing policy support.
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