The exploitation factor in Lebanon: how much you can build on a plot

The exploitation factor (عامل الاستثمار) sets how much you're allowed to build on a plot in Lebanon. It comes as two numbers, written like 40/120: the building may cover 40% of the land, and all its floors together may add up to 120% of the land's area. On a 1,000 m² plot, that's a 400 m² footprint and 1,200 m² of floor area, or three full floors.

Surface and total: what 40/120 means

Article 14 of the Building Law defines both. The surface factor (معدّل الاستثمار السطحي) is the building's footprint divided by the plot's area. The total factor (عامل الاستثمار العام) is the floor area of all the floors that count, divided by the plot's area. The second number is written either as a percentage (120) or as a multiple (1.2).

Both apply to the plot's area after taking out any part hit by an approved road alignment (تخطيط مصدّق). Easements in favour of neighbouring plots don't reduce it. Once a plot's factors are used up, a piece cut off it later can't be built on.

A plot worked through: 1,000 m² at 40/120

You don't have to use the full footprint: four floors of 300 m² also make 1,200 m², if the zone allows four floors. The zone's number of floors or maximum height, the setbacks (التراجعات) and the building envelope (الغلاف) often limit a narrow or steep plot more than the factor does.

What doesn't count in the built area

Article 14 of Law 646/2004 and Article 12 of its implementing decree (Decree 15874/2005, amended in 2007) leave these out, each under conditions:

• Open balconies, verandas and loggias: up to 20% of the building's counted area, and 25% of any one floor. Balconies used as the way into flats do count.
• Basements whose concrete roof is no more than 1 m above the ground: not counted at any size for parking, storage or the building's plant. For other uses, up to 50% of the zone's total factor.
• The main staircase and lift: up to 20 m² per block, plus 6 m² for each extra lift.
• The roof: stair and lift housings, water tanks and technical installations don't count in the total factor or the number of floors. Open roofs and terraces don't count at all. A tiled roof (ثكنة قرميد) up to 3 m high is left out under conditions.
• The concierge's flat (مسكن الناطور), up to 35 m² per block on the ground floor.
• A floor on pilotis (طابق الأعمدة), where up to 5% of the total factor can hold the entrance, the concierge's flat and the meters.

The law also leaves out a few smaller items, such as a double insulating wall and a fire stair. Balcony area above the limits counts. So the example plot's building can legally exceed 1,200 m²: the balconies alone can add 240 m².

Where the factor comes from

The factors are set by the area's plan, under the Urban Planning Law (Decree-Law 69/1983). A master plan (التصميم التوجيهي) sets broad uses. A detailed or zoning plan divides a town into zones (التصنيف), each with its own uses, factors, setbacks, height or number of floors, and minimum plot size (Articles 8 and 16).

The Directorate General of Urban Planning (المديرية العامة للتنظيم المدني) drafts the plans and a Cabinet decree puts them in force. The Building Law adds its own setbacks, such as 10 m from a river. For areas with no plan (المناطق غير المنظمة), it leaves the rules to a Cabinet decree, and the certificate below says which rules apply to a plot.

Two things can change what you can build on a plot:

• A study period. An area placed under study (تحت الدرس) by decree gets no building permits or subdivisions for a year, renewable once, except with the approval of the Higher Council for Urban Planning (المجلس الأعلى للتنظيم المدني).
• A revised plan. A lower factor gives the owner no right to compensation, unless the land can no longer be built on at all.

How to get the zoning and easements certificate

The zoning and easements certificate (إفادة تخطيط وارتفاق) shows the road alignments that hit a plot and the building rules that apply to it.

• Where: the urban planning office (دائرة التنظيم المدني) in each governorate and district centre, or the municipality's technical department in Beirut and Tripoli. Any LibanPost office also takes the request, from anyone, without written authorisation from the owner, and delivers the certificate to your address.
• What to bring: the plot number and cadastral zone, a full title extract (إفادة عقارية شاملة) under three months old, the municipality's receipt for the planning fee, and a survey map (خريطة مساحة) certified by the Ministry of Finance.
• Time and cost: five days at most, for fiscal stamps plus the municipal fee.
• Validity: four months. A building permit file needs one under three months old, and the engineer registers that file at the Order of Engineers in Beirut or Tripoli.

Tip: Get the certificate yourself before you sign a promise to sell (وعد بالبيع) on land, and ask an engineer to sketch what fits. The factor says nothing about slope or shape.

Why it matters when you buy land

A builder pays for floor area, not soil. To compare plots, divide the price by the buildable area (plot area times total factor). Two 1,000 m² plots at $300,000 each (made-up figures):

On the certificate, check whether an approved road cuts the plot, and ask whether the area is under study. If the plot is held in shares (أسهم), every co-owner signs the permit request, so read how title deeds work. Get a fresh title extract and budget the fees on top of the price.

Then search land for sale.