Construction in Lagos

Lagos is a coastal city built against a lagoon and the Gulf of Guinea. That single fact changes foundations, salt in the air, the way stormwater leaves a plot, and how long a wet trade can stay open. A house in Ikoyi, a warehouse yard in Ikorodu, and a duplex in Magodo can share a contractor and still need three different methods. This page is about those differences. It is not a copy of the Abuja or Ibadan notes with the city name swapped.

Water, from the sky and from below

A published climate summary for Lagos describes a rainy season from about April to October, a drier stretch from November to March, and roughly 1,550 millimetres of rain in a year. June is the wettest month in that table, near 290 millimetres, July is still heavy, August drops to around 70 millimetres, and September climbs again. Builders call the August easing the little dry season. It is a window, not a drought. A NiMet-based study of daily rainfall from 1990 to 2017 put the mean onset for Lagos around 27 March and the mean end around 4 November, a season of about 218 days. Programme the open slab and the uncapped walls with those dates in mind, and still leave room for a year that does not match the average.

The ground holds water as well. The Lekki peninsula is a coastal barrier. A Scientific African paper on flood risk there described rapid building on land that is mostly only a few metres above sea level: about 37 percent of the peninsula between half a metre and three metres, and about 63 percent between three and five. Storm-surge modelling in that work flooded large parts of Eti-Osa at higher surge levels. Separately, a geotechnical study of foundation soils in Ibeju-Lekki reported sandy profiles, shallow groundwater, and compressible behaviour that the authors translated into settlement and bearing figures for the sites they tested. Those papers are not a design for your plot. They are the reason “my brother used a strip footing in Ikeja” is not a specification for Ajah or Sangotedo.

Low-lying communities are a government subject, not only an academic one. The Lagos State Ministry of the Environment has described drainage contracts including System 44 in Lekki and the Odo-Iya Alaro system serving the Ikeja axis, and it has advised residents of low-lying places to move upland when heavy rain is forecast. If your ground floor has flooded, say so. A renovation that replaces tiles and leaves the floor at the same level will flood again.

Neighbourhoods are different jobs

Victoria Island, Ikoyi, and Lagos Island are tight, expensive, and close to salt air and a high water table. Sites are small, neighbours are close, and a delivery that blocks a street will stop the job faster than a missing nail. Reinforcement and metalwork need protection from moist air. Basements and deep excavations are a groundwater problem, not a status symbol.

Lekki, Lekki Phase 1, Ajah, and the Sangotedo stretch are the low sandy corridor. Long material runs, estate rules, and standing water after a June storm are the daily issues. A large roof must have somewhere legal to send the rain.

Ikeja, Maryland, Magodo, and Ogudu are mainland estate and commercial fabric. The Odo-Iya Alaro drainage story matters here. Plots are often easier for a truck than an Island close, and the houses are frequently renovations of a 1990s or 2000s duplex rather than a first build.

Surulere, Yaba, Ebute Metta, and Mushin are older street grids. Renovations, party walls, and compounds with more than one household are common. Access is the constraint. A concrete truck may not be the right tool.

Festac is a planned estate with its own drains and a reputation for localised flooding when those drains clog. Ikorodu mixes expanding residential edges with low-lying communities the environment ministry has named in flood advice. Apapa is industrial and port-adjacent: warehouses, heavy floors, and roads that already carry too much.

Name the actual district on the quote form. “Lagos” alone is how the wrong crew arrives with the wrong pump.

Permits, without a fake fee

The Lagos State Physical Planning Permit Authority grants the planning permit. The Lagos State Building Control Agency then controls construction. Its 2019 regulations, made under the state’s urban and regional planning law, define an extension as a vertical or horizontal addition and treat renovation as improvement that does not add floor area. A developer is expected to give notice before starting, keep the planning permit on site, and erect a board with the permit number, the project, and the professionals. Soil investigation is required for structures above four floors and for developments on low-bearing soils. A contractor’s all-risk policy is required for buildings above two floors. Stage inspections run from setting out through the frame, the floors, the roof, and the services.

The same regulations mention an inspection charge as a percentage of the planning assessment fee. A separate e-planning page has stated a different percentage for stage certification. Because those two official texts do not agree, this site will not quote a figure. Confirm the current charge with LASPPPA and LASBCA when you apply. What you can rely on is the sequence: permit, notice, inspections, and a certificate of fitness at the end if the work complies.

Block quality still sits under the work. The National Building Code of 2006 asks for washed lagoon sand if lagoon sand is used at all, and for sandcrete strengths of 2.00 N/mm² average and 1.75 N/mm² minimum on load-bearing walls of two- and three-storey houses. Lagos humidity will not cure a block that was dried in a day.

Asking for a Lagos quote

Send the neighbourhood, whether the site has flooded, how many floors exist or are proposed, and photos of the plot or the damage. Choose emergency timing only when the structure is unsafe. Micheletti Construction Limited reviews Lagos requests made here. Work fulfilled by Micheletti Construction. For the seasonal calendar in more detail, read rainy-season construction. For a first house, start with new builds.