DIEZ Approval
Dubai Integrated Economic Zones approvals for fit-outs in DSO, DAFZ, and Dubai CommerCity.
What Is DIEZ?
Overview
DIEZ (Dubai Integrated Economic Zones Authority) is the unified regulatory body overseeing Dubai Silicon Oasis (DSO), Dubai Airport Free Zone (DAFZ), and Dubai CommerCity (DCC). Any fit-out, renovation, MEP modification, signage, or significant maintenance works within these zones requires DIEZ approval before commencement. DIEZ acts as the single authority replacing separate zone approvals for these three economic zones.
Who Needs It
Who Typically Requires
This Approval
Zone Coverage
- Dubai Silicon Oasis (DSO) — tech parks and offices
- Dubai Airport Free Zone (DAFZ) — logistics and trade
- Dubai CommerCity (DCC) — e-commerce and distribution
Business Types
- Technology and IT companies
- Logistics and trading businesses
- E-commerce and distribution operators
- Office and commercial tenants
Project Types
- New fit-out for leased units
- Renovation or space reconfiguration
- MEP modifications and upgrades
- Signage installation or modification
The Process
Step-by-Step
Approval Process
Scope & Pre-Check
Define the works and confirm applicable DIEZ zone requirements for DSO, DAFZ, or DCC.
Site Survey
Survey the unit, review existing MEP capacity, and identify compliance considerations.
Drawing Preparation
Prepare architectural and MEP drawings per DIEZ technical standards.
Document Compilation
Compile company, unit, contractor, and technical documents for submission.
DIEZ Application Submission
Submit the complete application via DIEZ's online portal or zone customer service.
DIEZ Review
DIEZ authority reviews the technical package and supporting documents.
Comment Resolution
Address any DIEZ queries or revision requests and resubmit as needed.
Approval / NOC Issuance
Receive DIEZ approval or NOC. Works can commence under stated conditions.
Works Execution
Execute works per approved drawings by approved contractors.
Close-Out & Inspection
Arrange close-out inspection if required and submit as-built drawings for final sign-off.
Documents Required
Documents Checklist
Company & Unit Documents
- DIEZ / DSO / DAFZ / DCC trade license
- Tenancy contract or lease agreement
- Authorized signatory letter
- Landlord or building management NOC
Contractor Documents
- Contractor trade license
- Contractor liability insurance
- Engineer credentials
- Method statement for works
Technical Drawings
- Architectural floor plan (existing + proposed)
- MEP drawings for modifications
- Structural drawings (if applicable)
- Signage artwork or design drawings
Timeline
How Long Does It Take?
DIEZ approval timelines depend on the zone, project scope, and completeness of submission. Standard NOCs for complete submissions are typically reviewed within 5–15 working days. Works involving fire systems, structural changes, or multiple authority coordination may take 3–5 weeks. As with all authority approvals, a complete, accurate first submission is the fastest route to approval.
Common Issues
Rejection Reasons & Fixes
Works affecting life safety systems without DCD pre-approval
Obtain Civil Defense approval for any works impacting fire alarm, suppression, or emergency systems.
Missing or expired company documents
Ensure trade license, tenancy contract, and authorization letters are current before submission.
Contractor not registered or insured
Verify contractor holds valid UAE/DIEZ trade license and appropriate liability insurance.
Drawings not reflecting actual unit conditions
Conduct a site survey and ensure drawings match the actual unit layout.
Signage exceeding zone guidelines
Check DIEZ signage rules for dimensions, materials, and mounting before designing.
Incomplete MEP technical package
Include load calculations and full MEP drawing set for any electrical or mechanical modifications.
Structural changes without engineer approval
Provide structural engineer certification for any load-bearing or structural modifications.
FAQs
Frequently
Asked
Questions
Everything you need to know about the DIEZ approval process in Dubai.
Ask Us AnythingDIEZ is the unified authority for Dubai Silicon Oasis (DSO), Dubai Airport Free Zone (DAFZ), and Dubai CommerCity (DCC).
DIEZ has unified the regulatory function. You apply through DIEZ for approvals, though zone-specific requirements still apply.
Yes. For works affecting fire safety systems, DCD approval is required and is often a prerequisite for DIEZ.
Yes. We prepare drawings, compile documents, submit applications, and manage the process to approval for DSO, DAFZ, and DCC projects.
The submission portal is unified under DIEZ, but each zone may have specific technical guidelines. Our team verifies the applicable requirements per project.
Unauthorized works in DIEZ zones can result in stop-work orders, fines, and forced reinstatement.
Typically 3–6 months from issue. Extensions can be requested if works are ongoing.
Works in DIEZ-governed zones typically use DIEZ as the primary authority, replacing DM. However, DEWA and DCD approvals may still be required.
Ready to Get Your
DIEZ Approval?
Our team handles the entire process — from document preparation to submission and final approval. No stress, no delays.