A rooftop room, a driver's or housemaid's annex, an outdoor majlis or a laundry room: very common additions to villas, many built without a permit as a "minor detail", then causing problems on sale, an occupancy certificate application or unit sorting. An annex is not a detail: it is an extra load on the structure, a change to the licensed building's areas, and it may affect setbacks and privacy. Here is when you need an annex permit, what determines what is allowed, how to add one properly, and what to do if one already exists without a permit.
Do You Need a Permit?
Yes. Any addition to the components of a licensed building goes through Balady's adding and modifying building components service. Building it without a permit makes it a violation. Read: Fines for non-compliant buildings.
Common Types of Annex
| Type | Usual location | Special considerations |
|---|---|---|
| Rooftop room or upper annex | The roof | The allowed share of the roof area, and the load on the structure |
| Driver's or housemaid's annex | Ground level within the property line | Setbacks and its separate entrance |
| Outdoor majlis | Courtyard or frontage | Setbacks and building ratio |
| Laundry or storage room | Roof or courtyard | Drainage and ventilation |
What Determines What Is Allowed?
- The area's requirements for annexes: area, share of the roof, height and position. Read: Villa building regulations in Riyadh.
- Setbacks, which cannot be built on except as the requirements allow.
- The building's structural capacity for the extra load, especially for rooftop annexes.
- The overall building ratio after the addition.
Steps for a Proper Addition
- Review the site's requirements with an engineering office, and confirm the current building matches its permit.
- A structural assessment if the addition is on the roof. See our structural inspection reports service.
- Design the annex to meet the requirements and integrate architecturally with the building.
- Submit an adding and modifying components application through the office, then pay and obtain the permit.
- Build under engineering supervision.
Read also: Modifying building components and Can your building carry an additional floor?
What If the Annex Already Exists Without a Permit?
The route is usually existing building status rectification, with any fines calculated. If the annex fundamentally breaches the requirements (in a setback, for example, or larger than allowed), it may need modifying or partly removing before licensing. Read: Existing building status rectification.
Tips Before Building
- If you are building a new villa and expect an annex later, include it in the original permit or design the structure to carry it.
- Use lightweight materials for rooftop annexes where needed, on the structural engineer's advice.
- Do not rely on "the contractor says it's fine"; the regulatory file is your responsibility.
Frequently Asked Questions
Do the tank room or stair housing need a permit?
They are building components included in the approved plan, and any change to them goes through the same service.
Can the annex be turned into an apartment for rent?
It depends on the requirements and the building's use. Read: Dividing a villa into apartments.
Do rooftop hangars and shades need a permit?
Yes if they are permanent components, and they are subject to the area's requirements. Read: Shade violations.
How long does an annex permit take?
It depends on how ready the drawings are, the structural assessment, and whether the current building matches its permit.
Does an annex affect the occupancy certificate?
An unlicensed annex makes the building non-conforming, which blocks occupancy until it is fixed.
Related Guides
How Abak Engineering Consultancy Helps
Abak is an accredited engineering office in Riyadh that assesses your building's capacity, designs the annex to meet the requirements, and handles the addition permit or the rectification of existing annexes. Learn about our adding and modifying components service, or contact us.
Regulatory information is based on the Balady platform and the Ministry of Municipalities and Housing, and procedures may be updated by the competent authority. Last reviewed: October 2026.
