When Part of Your Plot Is Taken: A Worked Compensation Example

A partial taking affects more than the strip acquired. This illustrative example separates the two effects and shows why the second is routinely left out.

When a public scheme needs a strip of a plot, there are two distinct effects: the value of what is taken, and the effect on what remains. Owners instinctively focus on the first because it is visible and easy to calculate. The second is frequently larger and is not considered unless it is raised and evidenced. This example separates them with illustrative figures.

The situation

An owner holds a rectangular commercial plot on a main road. A road widening scheme requires a strip along the frontage. The owner needs to understand what the effect actually is before entering any discussion, and commissions an accredited valuer to assess both the part taken and the effect on the retained land.

Assumptions (illustrative)

• Plot area before: 2,000 square metres, with a frontage of 40 metres and a depth of 50 metres.
• Strip required: 6 metres of depth along the full 40 metre frontage, being 240 square metres.
• Assumed land value before the scheme: SAR 5,000 per square metre.
• Assumed permitted coverage: 60 per cent of plot area.
• Assumed required setback from the road: 6 metres.
• Assumed value of the plot as a whole before: SAR 10,000,000.

Step 1: Value the land physically taken

240 square metres at an assumed SAR 5,000 per square metre gives SAR 1,200,000.

This is the number the owner arrives with and the only one most owners calculate. It represents 12 per cent of the assumed SAR 10,000,000 whole plot value.

Step 2: Recalculate the buildable footprint before and after

Before: 2,000 square metres at 60 per cent coverage gives a footprint of 1,200 square metres. After: the plot is 1,760 square metres, and at 60 per cent coverage the footprint becomes 1,056 square metres.

The buildable footprint falls by 144 square metres, which is 12 per cent. On coverage alone, the loss is proportionate to the area taken and nothing unusual has happened yet.

Step 3: Test the effect of the setback on the usable depth

Before, the 6 metre setback left 44 metres of usable depth out of 50. After, the plot depth is 44 metres and the setback still applies, leaving 38 metres of usable depth. Usable depth therefore falls from 44 to 38 metres, a reduction of about 13.6 per cent.

The setback is measured from the new boundary, so the owner loses the strip and then loses setback depth again from the land that remains. This is the first effect that is not proportionate.

Step 4: Quantify the effect on the retained land value

If the constrained depth and the loss of the deepest part of the plot reduce the value of the retained 1,760 square metres by an assumed 8 per cent, the reduction is 1,760 times SAR 5,000 times 0.08, which is SAR 704,000.

The effect on the retained land is SAR 704,000 on these assumptions, which is more than half the value of the strip itself. It is invisible unless somebody assesses it.

Step 5: Total the two effects

SAR 1,200,000 for the land taken plus SAR 704,000 for the effect on the remainder gives SAR 1,904,000, against a plot previously assumed to be worth SAR 10,000,000.

The full effect is roughly 19 per cent of the plot value, against the 12 per cent that the area calculation alone suggests. An owner who only evidences the first figure is evidencing less than two thirds of the position.

Step 6: Test what happens if the remainder falls below a usable threshold

If the reduced depth meant that the intended building type were no longer viable, and the retained land reverted to a lower value use at an assumed SAR 3,500 per square metre, the retained value would fall from SAR 8,800,000 to SAR 6,160,000, a reduction of SAR 2,640,000.

Where a partial taking pushes a plot below a threshold, the effect on the remainder can dwarf the value of what was taken. This is the case that most needs professional assessment and is most often missed.

What changes the answer

• If the strip were 3 metres rather than 6, the taken value halves to SAR 600,000 and the proportionate effect on usable depth falls sharply.
• If the plot were 100 metres deep rather than 50, the same 6 metre strip would have a far smaller effect on usable depth and on the retained value.
• If no setback applied, the second effect would largely disappear and the loss would be close to proportionate.
• If land values were SAR 7,000 per square metre, every figure scales upward and the absolute gap between the two assessments widens to roughly SAR 985,000.
• If the taking removed the plot only vehicular access point, the effect on the remainder could exceed the value of the whole plot before the scheme.

What the numbers tell you

• Value the part taken and the effect on the remainder as two separate assessments.
• Setbacks measured from a new boundary compound the loss beyond the area removed.
• Shallow plots suffer disproportionately from frontage takings; deep plots barely notice them.
• Threshold effects, where a remainder stops supporting its intended use, dominate everything else.
• An assessment that produces only an area multiplied by a rate is an incomplete assessment.

Limits of this example

Every figure above is an illustrative assumption used to show the method, not a quote, valuation or market rate. Costs, rates, fees and regulations change and must be confirmed with the relevant authority, lender or supplier before you commit.

Domira works on the ownership side of a Saudi property for owners based abroad: verifying title and boundaries, assessing the building, handling registration and handover, and managing the asset afterwards. For legal and tax questions, work with a licensed adviser; Domira will tell you plainly what the property itself supports.