Interior Design
Synonyms: Interior Architecture، Fit-out Design، Interior Decoration
Last updated: 2026-09-25
Short Definition
Interior design is the planning and fitting out of a building's interior spaces — furniture layout, lighting, colours, materials, ceilings, floors and fixed fittings — to achieve function, comfort and visual identity within safety requirements.
Overview
Legal Basis
The Saudi Building Code Implementation Law (M/43 dated 26/4/1438H) applies the code to existing buildings when renovated or altered (Art. 2) and lists the Ministry of Interior (General Directorate of Civil Defense) among the authorities monitoring its application (Art. 1). Balady states that renovating a leased shop requires a permit that the tenant can request on the basis of the building permit. The Civil Transactions Law (M/191 dated 29/11/1444H) bars the tenant from making changes without the landlord's consent (Art. 432), obliges him to return the premises in the condition received except for normal use (Art. 435), governs the fate of his additions at the end of the lease (Art. 436), and entitles him to recover what he spent on works or repairs made with the landlord's permission for the benefit of the premises unless otherwise agreed (Art. 422).
Practical Example
A tenant leases a 120 m² shop in Jeddah to open a café at an annual rent of SAR 180,000 (plus 15% VAT, as the lease is commercial). He agrees in writing with the landlord on a two-month rent-free fit-out period and that fixed improvements stay with the landlord at the end of the lease without compensation. He hires an interior designer for SAR 18,000 and a fit-out contractor for SAR 240,000 (SAR 2,000 per m²), using materials that meet fire requirements with two emergency exits. He obtains a renovation permit through Balady on the basis of the building's permit before starting, avoiding a work stoppage during inspection.
Common Mistakes
- ✗Starting a leased shop fit-out without a permit or without the landlord's written consent.
- ✗Choosing combustible interior finishes or blocking emergency exits for aesthetic reasons.
- ✗Not agreeing in the lease on the fit-out period and ownership of improvements at lease end.
- ✗Removing walls or cutting ceilings as part of "decor" without a structural study.
- ✗Confusing the interior designer with the architect for works that require engineering accreditation or a permit.
International Differences
In some countries the title of interior designer is regulated by professional licensing, as in several US states, and in Turkey the "interior architect" (iç mimar) is a profession with its own chamber. In the UAE, shop and office fit-outs usually require municipality and civil defence approvals. In Saudi Arabia the framework centres on municipal renovation permits, compliance of materials with the building code's fire requirements, and the Civil Transactions Law's lease rules on alterations and improvements.
