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Structural Engineering | Civil Engineering | Structural Surveying



New Builds



  • Why Caltech?

    Whether you are considering a small-scale extension or loft conversion or something bigger like a new build dwelling or commercial property, CALtech Designs can assist from planning stage through to construction completion.   CALtech Designs has built up an extensive client list ranging from private individuals through to housing associations, developers and local authorities.

Opening Hours

Monday 8:30am - 6:00pm
Tuesday 8:30am - 6:00pm
Wednesday 8:30am - 6:00pm
Thursday 8:30am - 6:00pm
Friday 8:30am - 6:00pm
Saturday Closed
Sunday Closed
  • The Right Choice

    We pride ourselves on providing efficient and economic designs through use of traditional design methods and current industry standard design software. We maintain close working relationships with local builders and trades to ensure buildability with best practice is adopted at all times. We also have access to local external partners including AutoCAD draughtsman, reinforcement detailers, engineers and engineering software providers.

Our Services

All of our design services are fully backed up by professional indemnity insurance, level to suit the project type and value. All designs are Building Regulations compliant where required together with other proprietary guarantor and Building Control services including NHBC, LABC, Premier and Zurich.

  • New build houses, offices, schools, commercial, agricultural buildings, basements
  • Domestic extensions, loft conversions, beam design, wall removal, refurbishments, alterations, Building Control calculations
  • Structural surveys, structural reports, listed buildings, insurance claims, investigations, structural calculations
  • Design in multiple materials including steel, concrete, timber, masonry, glass and aluminium
  • Beams, columns, roofs, floors, lintels, walls, piers, foundations, retaining walls, connections, portal Frames
  • Foul and surface water drainage, SUDS, roads and paving
  • Party Wall services

About Us

CALtech Designs Ltd was formed in 2017, set up by Directors Clive Lewis and Mark Tanner. Having worked together for 7 years as Group Technical Director and Associate respectively at Fairhurst Engineers (formerly known as Gary Gabriel Associates), Clive and Mark have a combined 55 years’ experience in the Engineering sector.

Based in Sevenoaks, Kent, CALtech Designs primarily operates in the South East and London, across Kent, Sussex, Essex and Surrey. Each project is personally assigned a Director to manage and to provide direct client liaison.

Caltech Designs Limited

Registered Office

48A Holly Bush Lane,

Sevenoaks, Kent.

TN13 3TL

Company No. 10781654

VAT Registration No. 277 2404 95