Protostar Construction is an expert North London Builder of Residential and Commercial projects.We specialise in High Specification Full Construction Services for New Build or Renovation.

Protostar Construction is a family-owned and run Construction Company with a 17+ year successful track record. We can help with Building projects from extensions to large and complex Property Development schemes. Our Typical projects range from £200K to £4m.

Our Services

Protostar Guarantee

A Construction project shouldn't be risky. This is our Guarantee

Protostar Construction prides itself in delivering projects on time and to budget. We offer the following Gurantees to each of our clients to give them peace of mind and certainty that their project will be completed and that they are cared for long after handover.

No Deposit!

We don't take money upfront, instead we start the works. Work is valued as it progresses and you pay only for what has been done. Hence there are no risks.

Long Aftercare!

After the work is complete we don't just leave you. We give warrantied cover for 3,6,12 months or more during which we rectify faults to your satisfaction. During this time you hold a retention sum for peace of mind. On occasion we have helped old clients years after completing a project...

Personal Service!

Construction can be complex and confusing. Throughout your project we are your Guide, we work closely with your design team and help you add value and quality in a cost conscious way. We believe in trust and transparency and care for each project as if it is our own.

Our Professional network

Past Clients & Collaborators

As a specialist London Builder we work with a variety of private & commercial clients. And recently even a charity.Over the years we have honed our service to be specifically well suited to Architects, Structural Engineers, Project Managers, Surveyors and Funders.


Featured Testimonials

— Meir Porat, HRP Partnership London

Project Manager & Quantity Surveyor

five black stars rating

" We found the directors and their team to be very professional and collaborative. Protostar won the contracts during competitive tendering process and their management on and off site is excellent. We will not hesitate to use them in the future or recommend them to anyone.  "

— Yossi Shahar, TAL Architecture


five black stars rating

"  We feel confident in recommending Protostar for their knowledge and practical experience in constructing the projects to the designs and specifications desired. For their management of the development of the project, quality control, budget, programme and communication with the Design, Consultant and PM team.  "

— Dovid Benmayer, Finchley Fed Synagogue


five black stars rating

"  An excellent contractor and strongly recommended! Dor and Ezra were attentive to every detail, highly professional and responsive throughout the project. A real pleasure to work with!  "