About Us
A Saudi company specialised in project management and engineering consultancy — planning, supervising and delivering to standards worthy of our clients' trust.
Trusted by Leading Clients
Click any client logo to explore the project we delivered for them.
Our Story
Quarterline was founded in 2014 in Jeddah, built on a simple belief: a successful project needs one party that takes full responsibility, from the engineering study to handover.
We started as a small carpentry workshop, and today we manage and supervise residential and commercial projects across Jeddah, Makkah and the Western Region and beyond, with a team of 45 engineers and specialised technicians.
Vision & Mission
Our Vision
To be the Kingdom's first choice for integrated project management and engineering consultancy.
Our Mission
To manage and deliver high-quality projects on schedule, with a transparency that builds long-term relationships with our clients.
Our Values
Craftsmanship
Every detail treated as the one that matters most.
Commitment
A deadline we give is a promise we keep.
Transparency
Clear pricing and constant communication.
Accountability
We own the project, end to end.
What We Do
One team across every line of work — pick a service for the full detail.
Our Team
Behind every project is a team of engineers and craftsmen who combine experience with passion.
Licenses & Certifications
A registered and classified company — every number here can be verified.
- Commercial registration
7037442030
- VAT number
314978967600003
- Contractor classification
Grade five — Buildings
- Chamber of Commerce membership
Jeddah Chamber
Have a project in mind? Let's build it together.
Send us the details and our team will come back within 48 hours with an initial quote.