**2. Component of housing quality**

Components of housing quality are the measures used to assess housing scheme based on quality rather than cost [12]. Quality housing should provide adequate protection from cold, damp, heat, rain, wind, structural hazards, diseases vectors, and other threats to human health. However, the quality of the internal environment is also important. The components of housing quality measurement should ideally include the external structure, the internal structure, the internal environment coupled with an assessment of the neighborhood and environmental sustainability as described in **Figure 1**. The external structure is described by the structural integrity of the building, weathertightness, security, integrity of the external materials and insulation. The presence of basic facilities such as water supply, sewage disposal, power supply and other internal facilities such as closed doors, secured electric wiring, tightened windows explain the internal structure of the building. The internal environment is described in terms of ventilation, lighting, indoor air quality and moisture. A broader assessment of the quality and safety of the neighborhood in terms of community facilities, quality of paths/streets and services coupled with environmental sustainability forms an integral component of housing quality.

**3. Brief profile of Nigeria**

Nigeria is the most populous nation in Africa with over 155 million people [13]. Based on 2010 Gross National Income (GNI) per capita, the World Bank classified Nigeria as a "Lower Middle Income Economy," i.e., GNI ranging from \$1006 to \$3975. Nigeria is situated in west-

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border with Benin (773 km), Niger (1497 km), Chad (87 km) and Cameroon (1690 km), with a coastline of at least 853 km. Nigeria is between latitudes 4° and 14°N, and longitudes 2° and 15°E. The country has more than 500 ethnic groups, out of which the Hausa, Yoruba and Igbo are the largest. Nigeria is the 12th main manufacturer of petroleum in the world and the 8th major exporter, and has the 10th largest proven reserves. Petroleum plays a large role in the

economy of Nigeria, accounting for 40% of GDP and 80% of Government earnings.

. It shares a 4047 km

ern Africa on the Gulf of Guinea and has a total area of 923,768 km2

**Figure 1.** Component of housing quality. Source: Statistics New Zealand Information Centre.

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**Figure 1.** Component of housing quality. Source: Statistics New Zealand Information Centre.
