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Our systematic, detailed estimating process produces thorough, responsible estimates that are utilized for successful project planning and maximizing the overall value on each of our projects.

Our preconstruction services include:

Planning Consultancy

Construction planning is a fundamental and challenging activity in the management and execution of construction projects. It involves the choice of technology, the definition of work tasks, the estimation of the required resources and durations for individual tasks, and the identification of any interactions among the different work tasks. A good construction plan is the basis for developing the budget and the schedule for work.

  • We can help with commercial and specific planning advice
  • Wise manage engagement with the local planning authority and other stakeholders
  • Help in the selection of the best consultant team for the project
  • Represent your best commercial interests throughout the planning process

Architectural Design

Our unique approach brings together all those involved with the home’s concept – owner, architect, interior designer, and landscape architect – and each party who will help bring that concept to a successful conclusion – the construction leaders, key subcontractors, and Sylvester corporate management.

This open, collaborative method makes the process of building a home a pleasurable, seamless experience. It also allows the very best ideas, and the best communications, to evolve.

CORNERSTONE GENERAL CONTRACTORS staff is comprised of career construction professionals who have a passion for building spectacular homes, exceptional technical and collaborative skills and a commitment to meeting schedules.

Design & Build

CORNERSTONE GENERAL CONTRACTORS is a boutique architectural design and construction company offering personalized design and construction tailored to maximize your budget.

  • Professional interior design and construction from one source
  • Personalized scheduling with transparent contracting
  • Step-by-step timeframes for your entire project
  • Excellent project management from concept to completion
  • Ongoing communication to make your vision a reality
  • 10-plus years of design and construction experience
  • All work guaranteed with outstanding post-warranty assistance & maintenance

Eco Sustainable Homes

CORNERSTONE GENERAL CONTRACTORS is a leading London custom home builder, specializing in fine homes, modern homes, including Eco-friendly green projects and renovations.

At CORNERSTONE GENERAL CONTRACTORS we believe that the customers experience is paramount and we strive to provide an unparalleled product that exceeds expectations. We bring over 10 years of experience in addition to expert craftsmanship, building science, and project management acumen to every project. We recognize that we are a service company, in addition to delivering a great home we seek 100% customer satisfaction.

Property Renovation 

CORNERSTONE GENERAL CONTRACTORS is the innovative leader in large-scale multifamily and commercial interior/community space renovations. We understand that an upfront investment in renovations can transform the look of your properties, yielding significant returns. If you love your existing home but just need more space we deliver expert solutions through total project management and renovation.

  • Our Specialists Create a Tailored Solution
  • We Bulk Price and Custom “Kit” Your Unit-Specific Products
  • We Ensure Your Products Arrive Exactly When & Where Needed
  • Our Experts Bring You the Latest Trends, New Product Innovations and Legislation Insight

Project Management

Project management is one of those things that looks easy until you try it. The fundamentals of managing a project from start to finish require a team of individuals with different talents and skills. Those people are responsible for planning and executing the project objectives and that takes more than just labour and materials.

Construction Project Management is all about effective teamwork, in order to meet our client’s corporate goals. We understand the needs of our clients and like to build long-term relationships with them by focusing on their business goals and finding solutions to add value to their company.

We offer:

  • Independent Consultancy
  • Construction Portfolio Management
  • In House Team Strengthening
  • Construction Development Management
  • Independent Certification
  • Construction Planning

Interior Design

We feel that interior design is one of the most important investments you will ever make. Whether your needs are Residential or Commercial Interior Design or Model Home Merchandising, our commitment to your project includes giving nothing less than our best. We will supervise every aspect of your project from initial concept to final walk-through.

Whether you are simply restyling a single room or embarking on an extensive development project our designers will guide you through every stage of your journey, from initial ideas and mood boards to a final timeless arrangement that will delight and perform for years to come. Before the creative work begins our designers will undertake essential home visits, conducting all relevant surveys to ensure that every detail is correct and throughout will provide accurate cost breakdowns to ensure we work to your budgets.

The team effort has proven successful in providing our clients with superior design, dedicated personal attention to detail and excellent service.


When you choose to carry out a project with CORNERSTONE GENERAL CONTRACTORS, it is important to recognise that our service to you doesn’t come to an end when the building has been completed.

As part of our commitment to you, we provide all our clients with a ‘defects liability period’ that will commence on the agreed finishing date of the project – this means our team or relevant subcontractor will attend to any issues you may have regarding the work we have completed that arise within a specified time frame of up to 12 months.


18 Tiverton Road, Ruislip, Middlesex, HA4 0BW


01344 884650

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