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To save you the time and work involved, we can 

  • Provide Drawings for you

  • Also Arrange Planning Permission

  • We can attend to all of the Building Regulation Requirements for you

  • Manage Your Project 

     All At A Fixed Price 

Collenmore Construction Builder Richmond Twickenham Loft Conversions Extensions



For projects which are going to require Planning Permission

The Prices below include Planning Drawings and Agent Services

Garage Conversion



Single Storey Extension


Loft conversion  



Double Storey Extension


Building Regulations Upgrade Prices for Projects that have Planning Permission.

The Prices below include Buildings Regulation Compliant Drawings

Garage Conversion



Single Storey Extension


Loft conversion  



Double Storey Extension


Permitted Development Package Deals

All the Planning Development Planning Drawings, Building regulation Documents and Agent Services

All in One Simple Package

Garage Conversion



Rear Single Storey Extension


Side Single Storey Extension


Loft conversion  



  • A full set of 1:100 scaled As Existing Floor Plans, Roof Plans and Elevations;

  • Unlimited changes to your proposed layouts during the development phase of the works;

  • A Full Set of 1:100 scaled As Proposed Floor Plans, Roof Plans and Elevations;

  • Your 1:1250 site map and 1:200 Existing and Proposed Site Block Plans;

  • We will submit your Planning Application on your behalf and act as your Planning Agent;

  • Upgrade your Planning Drawings to a Building Regulations package consisting of detailed 1:50 A1 or A0 drawings (including dimension drawing, foundation plans, roof layouts, structural details, drainage layouts, electrical layouts and detailed scope of works documentation);

  • Submit your Building Regulations Full Plans Application and act as your Building Regs Agent; and

  • When all of your necessary permissions and approvals are in place we will send you PDF files of your drawings and documentation and 2x paper copies of your full Planning and Building Control Pack.

This information should be considered as an overview of the general service that we provide. Additional terms apply and conditions apply and should be read in conjunction with the overview information.

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