We Design and Build High end Properties in Sydney

We are a one stop shop with innovative ideas for your ideal custom home project, high end residential alterations, additions and extensions, multi storey commercial as well as commercial fitouts.


Vault Design & Build

We are a one stop shop with innovative ideas for your luxury home project, high end residential alterations, additions and extensions, multi storey commercial as well as commercial fitouts. Our solid knowledge and experience in the industry allow us to provide the highest quality of workmanship and professionalism in delivering and accomplishing variety of successful projects. Our experienced staffs enable us to provide the highest standard of service in the industry.

Vault team is expert in design, project management, cost consultancy, value engineering and facilities management which thrive within our collaborative and entrepreneurial culture. We are constantly striving to finding better solutions to complex infrastructure and building challenges.




We offer innovative design services for the variety of commercial and residential from the projects’ conceptual stage up to the detailed design stage

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High end and luxury residential projects

High end Custom Residential Projects

Our professional and committed design team will assess your specific  requirements in a custom home project considering your conditions and work alongside with you to create the innovative designs based on your ideas and requirements within the allocated budget.

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Vault Design & Build - Fit Out

Interior Fitout

We perform a bespoke and crafted work for each individual space, whether residential interiors or office fitouts. Our goal is to deliver elegant spaces that present beauty with an integrity of materiality and function.

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Vault Design & Build - Multi Storey Commercial

Multi Storey Commercial

Our experienced and creative design team will assess the project’s spatial and physical plans and work closely with the client towards achieving the best possible alternatives and concepts.

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We offer innovative design services for the commercial and residential projects’  from the conceptual stage up to the detailed design stage

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Vault Design & Build is established in 2020. The objective of the company is to provide a full range of design and construction services tailored to our clients’ specific requirements. We have recognised the gap between the designers and the builders in the industry and intend to fill this gap by removing the lag.

We are a creative and innovative D&C entity, experienced in commercial, and high end residential as well as industrial sectors. 

Vault Design & Build - Director Photo min

The Director

Shahin Zelli, the director has graduated in 2004 with BCS Civil Structural Engineering, he has a solid experience on a variety of construction and fit out projects across Australia and overseas. He has been a member of the Institute of Engineers Australia since 2010 in civil and structural as well as management and leadership departments.

Shahin has spent much of his career managing design and construction, delivering across a vast array of complex projects. His knowledge and experience allow us to assess the feasibility of the projects and offer business plans and value engineering solutions to our clients.

Projects Portfolio

Major Residential Alterations &Additions

Wahroonga, Completed

New Residence in Acreage Land

Vault D&B have started this exceptional residential project at Sydney northern suburbs. The approx. building area 850sqm. Under Construction

Residential Alterations and Extension

East Lindfield, Completed
Vault Design & Build - 20230921 120110 002

Terrace House, Major Refurbishment

City Of Sydney, In Progress

Terrace House, Major Remodeling

Vault D&B have started this exceptional residential project at City of Sydney. 4 Storey Luxury Terrace House. This is a full design and construct project.
Vault Design & Build - 20210527 101253 1

Facade Structure Remedial Works

City of Sydney
Vault D&B have successfully completed the design and construction works of a 12 storey building facade structure remedial works in the city of Sydney.
Why Do

Clients Choose Us?

Three reasons why clients choose Vault Design & Build for their luxury home project, high end residential alterations, additions and extensions, multi storey commercial as well as commercial fitouts. 


Our flexibility means that we are able to work closely with our clients to understand their individual needs, determine what each project requires and offer our innovative and exceptional design and construction services accordingly.


Our approach to health and safety is based on the philosophy that once an incident occurs there’s no way to turn back time and each individual deserves to work in a safe workplace. At Vault D & B, we have the duty to take care of our team, those around them and ultimately the public.


It is our commitment to our planet and future generations is our commitment to consider and priorities the sustainable building practices and the environment. By Embracing change through better building practices and improved environmental outcomes.

Frequently Asked


For non professionals selecting a design and build contractor for custom home project, multi storey and commercial fitouts will remove the customary lag between the design and construction teams. This will: 

– reduce the costs imposed by engaging different consultant teams, 

– mitigates the possibility of fluctuation in the project costs, the contractor will ensure to deliver the project without exceeding the budget

– saves huge amount of time

– reduces the clients’ / owners’ risks and responsibilities for custom home projects.

It is recommended to engage the design and construct contractor in the early stages of the project to mitigate the double working. The D&C contractor can start from the concept design, Works can start immediately after finalising most of the required drawings while the detail design is under development (Construction works and design can be overlap). Furthermore, in the design and built procurement method contractor will provide his maximum expertise at the design stage.

Depending on the requirements of the project and the clients’ request the following items can be covered by a Sydney design and build contractor

– Architectural Concept designs

– 3D images

– DA application drawings

– Structure and civil designs

– Hydraulic designs

– Electrical designs

Vault Design and Build offers free of charge value engineering process In custom home projects/ commercial and fitouts which is a systematic process of review and analysis of a project, during the concept and design phases that is conducted to provide recommendations for:

– providing the needed functions safely, reliably, efficiently, and at the lowest overall cost;

– improving the value and quality of the project; and

– reducing the time to complete the project.

Vault Design & Build - master builders association member