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Architectural Design Services

Architectural Design Services

Whatever type of home extension you are considering, we have a comprehensive range of architectural design services to suit your needs. Whether it is a complete design solution from initial conception through to completion, or detailed architectural plans to accompany your existing building plans.

Our architectural design services include:

  • Initial feasibility sketch designs
  • Planning consultancy
  • Preparation of initial design briefs
  • Pre-application submissions
  • Heritage statements
  • Design and access statements
  • As-built plans
  • Pre-purchase feasibility study
  • Planning application drawings and details
  • Planning application submission to local authority
  • Building control/ working plans
  • Building control submission
  • Good relationships with planning and building control officers

Additional Services

In addition to general architectural design services, we offer a full suite of individual services using our associate specialists which can be incorporated into your design package or used as one-off services to suit your needs. These are:

RKN Architectural Services weybridge surrey structural calculations

Structural calculations

If you plan to remove part of the loadbearing structure of your property, you will likely require structural calculations to justify the design for Part A (Structure) under the building regulations. We work alongside our trusted engineers to ensure your project meets your structural needs whilst complying with the building regulations.

RKN Architectural Services weybridge surrey thermal sap calculations

Thermal / SAP calculations

If you are creating a home extension with excessive glazing areas, you may exceed the allowable area under Part L (conservation of fuel and power). In order to comply, you may require SAP calculations to specify the required level of insulation.

RKN Architectural Services weybridge surrey Build-over agreement

Build-over agreements

If your home extension is proposed to be built over or within three metres of a public sewer you will require a build-over agreement. This requires the submission of detailed cross sections to illustrate the location of the sewer and proposed solution to overcome the issue.

RKN Architectural Services weybridge surrey party wall agreement

Party wall agreements

If you plan to have a home extension which is attached or close by a neighbouring property, then the chances are that you will need a party wall agreement with your neighbour.

RKN Architectural Services weybridge surrey topography

Topographical surveys

Planning a self-build project? You will more than likely require a topographical survey to illustrate to assist in the preparation of your new build property.

RKN Architectural Services weybridge surrey estimating


Renovating or extending your property may be a once in a lifetime event which often requires a lot of time and money to see the project to completion. To ensure the project aligns with your budget and stays within the project scope, an estimator can provide the necessary input you may be looking for.