Subdividing or merging plots in Saudi Arabia is a regulated procedure with its own steps at the competent authorities, but its technical core is surveying: fixing the existing boundaries accurately, drawing the new ones, calculating each resulting area and documenting everything with coordinates and clear drawings. This guide covers that survey side. It does not replace the official procedure on Balady and at your municipality, which varies by case and plan and is updated from time to time.
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Subdivision and merging in survey terms
Subdivision splits one plot into two or more, each with its own boundary and area. Merging joins adjacent plots into one with a single outer boundary. Both need answers to three questions: where are the current boundaries on the ground and do they match the deeds; where will the new boundaries be; and does the area add up?
Step 1: verify the current situation
- Collect all deeds and any earlier survey decisions.
- Survey the existing corners and tie them to KSA-GRF17.
- Compare measured lengths and areas with the deeds.
- Document any difference before going further.
If there is a difference, the usual path is a survey report, municipal approval, then a deed amendment on Najiz. Fixing it before subdividing is far easier than fixing it across several new deeds.
Step 2: one coordinate system
Use KSA-GRF17 (GRS 1980) and the correct UTM zone: 37N for Jeddah, Makkah, Madinah and Tabuk; 38N for Riyadh, Qassim, Hail and Abha; 39N for Dammam, Khobar, Jubail and Al-Ahsa. Older deeds may sit on legacy datums such as Ain el Abd. See the KSA-GRF17 guide or the coordinate converter.
Step 3: designing subdivision lines
- Each new plot needs frontage or lawful access under the requirements.
- Dimensions and minimum areas follow the plan and municipality; check, do not assume.
- Keep shapes regular where possible to ease later design and setbacks.
- Compute every new corner and close each polygon mathematically.
Step 4: areas and shared boundaries
The resulting areas must add up to the original (allowing for any land taken for public use where required), and a merged plot must equal the sum of its parts. Compute areas from coordinates, check closure, round only in the final table and confirm units. Use the land area calculator and area unit converter for checks.
When merging: shared boundaries
Before merging, confirm the plots actually touch with no gaps or overlaps. If a shared boundary has different coordinates in neighbouring deeds, resolve the strip first, then draw the unified outer boundary.
Step 5: drawings and deliverables
- Existing-situation drawing with original plots and areas.
- Proposed drawing with new plots or the merged plot.
- Coordinate table, side lengths, areas, streets and neighbours.
- A digital file later offices can build on.
If the property is in a real estate registration district, registration requires coordinates and produces a property number and deed per unit, so check rer.sa. For context, see land surveying in Saudi Arabia.
Common mistakes
- Relying on the deed without surveying the ground.
- Mixing old and new coordinate systems.
- Creating plots with no access or non-compliant dimensions.
- Areas that do not close.
- Ignoring gaps or overlaps between plots being merged.
- Placing new boundary pegs before approval.
The official procedure is set by the authorities and can change; check Balady, your municipality and rer.sa where relevant.
FAQ
Can any plot be split into any number of parts?
Do not assume so; subdivision and plot dimensions are governed by the plan and municipality.
Why don't the new areas add up to the deed?
Possible causes include a deed-versus-ground difference, a datum mix-up or rounding. A survey identifies the cause.
Do I need a new survey to merge if I have old survey decisions?
Old decisions help, but verifying the ground and shared boundaries is practically essential; official requirements are set by the authority.
How EL EMAN can help
We are preparing to serve projects in Riyadh, Jeddah, the Eastern Province and other cities with surveying, contracting and equipment sales and rental, and are taking requests now via WhatsApp or the contact form.
