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Adewunmi, Y, Omirin, M and Koleoso, H (2016) Prioritising facilities management services for benchmarking in selected cities in Nigeria. Journal of Construction in Developing Countries, 21(1), 131-45.

Aje, I O, Oladinrin, T O and Nwaole, A N C (2016) Factors influencing success rate of contractors in competitive bidding for construction works in South-East, Nigeria. Journal of Construction in Developing Countries, 21(1), 19-34.

Al Nasseri, H and Aulin, R (2016) Understanding management roles and organisational behaviours in planning and scheduling based on construction projects in Oman. Journal of Construction in Developing Countries, 21(1), 1-18.

Foster, P, Abdelal, G, Lim, J B P, Hajsadeghi, M and McCrum, D (2016) Finite element modelling of cyclic behaviour of cold-formed steel bolted moment-resisting connections. Journal of Construction in Developing Countries, 21(1), 167-80.

Gambo, N, Said, I and Ismail, R (2016) Influences of cost factors affecting technical performance of local government projects in Nigeria: A partial least square-structural equation modeling approach. Journal of Construction in Developing Countries, 21(1), 85-111.

Gomez, C and Gambo, M (2016) Evaluation of special purpose vehicle organisation skill sets taxonomy for effective public-private partnership infrastructure project delivery. Journal of Construction in Developing Countries, 21(1), 147-65.

Kwofie, T E, Adinyira, E and Fugar, F (2016) Modelling the effect of housing design unit contract packaging on mass housing project team communication performance. Journal of Construction in Developing Countries, 21(1), 35-50.

Samarghandi, H, Tabatabaei, S M M, Taabayan, P, Hashemi, A M and Willoughby, K (2016) Studying the reasons for delay and cost overrun in construction projects: The case of Iran. Journal of Construction in Developing Countries, 21(1), 51-84.

Sanga, S A and Lucian, C (2016) Cost shares and factor-cost ratios in owner-built incremental housing in dar es salaam, Tanzania. Journal of Construction in Developing Countries, 21(1), 113-30.

  • Type: Journal Article
  • Keywords: cost; dar es salaam; factor-cost ratios; housing; owner-built housing
  • ISBN/ISSN: 1823-6499
  • URL: https://doi.org/10.21315/jcdc2016.21.1.6
  • Abstract:
    The adoption of incremental owner-built techniques in housing construction relies on the associated lower cost compared to developer-built approaches. The mechanism that lowers cost is however, not obvious. This study is based on survey data that were collected using questionnaires which were distributed to 200 respondents in Dar es Salaam, Tanzania with response rate of 22.5%. The analysis results, based on descriptive statistics and regression analysis indicate that an incremental house-builder targeting an additional bedroom incrementally spends 28% lower annual construction cost and each additional square meter built, is associated with 0.4% lower cost. However, such lower cost comes at a 5%-10% longer completion time. These observations suggest that spreading costs over time reduces construction cost through multiple cost-saving channels opened up by time itself and factor intensity. The intensity of incremental housing construction favours increasing expenditure on labour than capital yielding a 5% reduction in annual cost but the greatest cost reduction benefit of up to 26% is realised through increasing expenditure on "capital" with fixed spending on materials during construction. © Penerbit Universiti Sains Malaysia, 2016.