Many Lagos buildings have low ceilings (3.5‑4.0m). A standard MRL elevator needs 3.8m minimum overhead clearance. This can be a challenge. Here is how to measure and what to do if you have less.

[Image: A technician using a laser measure to check the overhead clearance in an unfinished Lagos building shaft, concrete slab and false ceiling visible.]

How to Measure Overhead Clearance

Measuring your MRL elevator overhead clearance is simple. You measure from the top landing finished floor to the roof slab. Then you subtract 0.2 metres for beams or a false ceiling. This gives you the net clear height inside the hoistway.

First, stand on the highest floor your lift will serve. Use a laser measure or a long tape. Measure straight up to the underside of the concrete roof slab. Do not stop at the suspended ceiling tiles. Many older buildings in Yaba or Surulere hide deep beams above a false ceiling. Those beams eat into the real clearance. We have seen measurements drop by 250 mm because of a large beam nobody knew about.

Record the smallest dimension you find. The lift car needs full clearance over the entire shaft area. Any beam or service pipe that hangs lower becomes the limiting point. A hard fact: The Nigerian Industrial Standard NIS 326:2017 and EN 81-20 require a minimum clear headroom of 3,800 mm from the top landing sill for a typical MRL traction lift. This safe space protects maintenance technicians who work on top of the car. It also allows the car to overspeed slightly without hitting the roof. Never guess this number. A 100 mm error can cause a project to fail SON inspection.

Our team has measured hundreds of hoistways in Lagos mainland and island districts. In some Ikoyi apartment blocks built in the 1990s, the original slab‑to‑slab height is only 3.5 metres. The building owner hoped for a modern MRL because of its energy savings and lack of a machine room. But the physical space left no room for standard equipment. You can avoid that shock by measuring early. Once you have your exact measurement, you can explore the solutions in the next section.

If Overhead <3.8m – Options

If your measured overhead clearance is below 3.8 metres, you still have three practical retrofit options. The right choice depends on your building’s structure, budget, and energy goals. We assess each hoistway in Lagos, Abuja, and Port Harcourt weekly. The West African climate adds extra demands: surge‑prone grid power, high humidity, and salty air along the coast.

[Image: Simplified comparison graphic showing shaft height needs for a standard MRL (3.8m), a hydraulic elevator (3.5m), and a low‑headroom MRL (3.5m).]

Option A: Switch to a Hydraulic Elevator

A hydraulic lift system needs only about 3.5 metres of overhead clearance. The piston pushes the car from below, so the machine sits in a separate machine room at the lowest level. This design removes the traction drive motor from the top of the shaft. It often works for buildings with a tight roof slab but space for a small pump room near the bottom landing.

The trade‑off is higher energy use. Hydraulic pumps run during every upward trip. In a busy commercial building in Ikeja, that can raise your monthly power bill compared to an MRL traction drive. Hydraulic systems also require regular oil changes and leak checks. A hard fact: Hydraulic lifts installed in coastal Lagos must use sealed piston assemblies and anti‑corrosion coatings to resist the salty air of Lekki and Victoria Island. Without that protection, cylinder rust becomes a safety risk under COREN’s machinery regulations.

We install hydraulic lifts with control panels that have built‑in voltage stabilisation. This protects the pump motor from the sudden swings common on the national grid. The oil reservoir also gets a dust‑proof breather cap to handle harmattan‑season dust. If you can accept higher running costs and you have a dry, ventilated space for the machine room, a hydraulic lift is a reliable choice. We can then size the car and doors to fit your exact shaft.

Option B: Raise the Roof Slab of the Shaft

This is the most invasive path, but it is possible. You cut a section of the existing roof slab over the lift shaft and rebuild it at a higher level. The shaft walls are extended up, and a new lintel is cast. We have done this for a six‑storey office block in Abuja’s central business district. The client wanted an MRL elevator without compromise. Lowering the roof slab gave them a full 4.0 metres of internal headroom.

Be ready for structural engineering work. You will need a COREN‑registered civil engineer to assess the load path and design the new roof. The building must stay stable while the old slab is broken out. Scaffolding, debris removal, and weather protection add cost. In Lagos, you also need to consider the rainy season. A sudden downpour during an open‑roof operation can flood the shaft and damage floors below. We always schedule this work between November and March when rainfall is lighter.

The benefit is you end up with a standard MRL lift. You keep the energy efficiency, the smooth traction ride, and the clean design without a machine room. It is expensive, but for high‑end commercial property on Victoria Island, the long‑term operating savings can justify the upfront spend. We help you manage the process and supply the MRL system that fits your new, taller shaft.

Option C: Low‑Headroom MRL Lift

Some manufacturers now produce a special MRL elevator that fits into a 3.5‑metre overhead clearance. The motor and controller are arranged differently inside the hoistway. The car top safety equipment is redesigned to reduce the standing space needed above the car. This low‑headroom version still uses a traction drive, so energy consumption stays low.

We supply these compact MRL lifts through Dove Lifts, a partner with a tested 3.5‑metre low‑headroom model. The system meets EN 81‑20/50 safety codes. The reduced headroom means the technician still has the required refuge space, but every millimetre is optimised. In a tight shaft in a Surulere residential building, this option saved the client from structural work. They kept their original roof and still got a quiet, gearless MRL. A crucial hard fact: Low‑headroom MRL lifts must be ordered early because the car frame and guide rails are factory‑sized exactly to your shaft height. There is no room for on‑site adjustment.

Environmental adaptation is built in. Our low‑headroom models come with conformal‑coated control boards. This coating protects against the high humidity that leaks into many Lagos lift shafts. We also install a surge protection device rated for West African mains instability. The result is a durable vertical transportation system that fits older building footprints. Ask us if a low‑headroom MRL will work for your hoistway. We will review your measurements and the structural opening.

Once you know your overhead clearance, picking a direction becomes straightforward. Low‑headroom MRL kits give you modern efficiency without demolition. Hydraulic lifts are a simpler installation when a machine room is possible. Roof‑raising is the final answer for owners who want no compromise and are prepared for the construction work. For a broader comparison, read our guide on MRL vs Traditional Elevator. If your building already has an old lift, see our post on Elevator Retrofit for Existing Buildings.

Send us your ceiling height – we’ll recommend the best fit. Email your measurement to our team, and we will send you a shortlist of lift systems that match your building. Every recommendation includes a full safety compliance letter and an installation timeline suited to Lagos conditions.