Architectural Process

Many people find the architectural process daunting or convoluted, yet it doesn’t need to be.

The RIBA Plan of Work 2020 provides an industry-recognised, step-by-step guide for all those involved in the briefing, designing and constructing of architectural buildings.

We have incorporated the RIBA Plan of Work into our own 4-step process for all our projects – see it in full, below.

We believe this clarifies what is involved in the architectural process and demystifies it for those who are not in the industry.

1 Consultation

Contact and Consultation

When you contact us, one of our team will ask some key details about you and the project. An architect will contact you to discuss in more detail your individual brief and make an appointment to view the building/site.

The aim of this first visit is to identify any potential planning issues and assess the site itself. If it is a refurbishment project, the aim will include thinking about the flow of space and light in the building, as well as considering the practicalities involved in the scheme, such as site access.


This is also the beginning of a working relationship with the practice, so an opportunity for you to ask any questions or raise any concerns about the process ahead. Most importantly, it is to discuss the brief or help you to formulate one that addresses your needs.

Fee Proposal and Stages of Work

Following the consultation we will issue you an informal email and if of interest; we will issue with you a letter of appointment that serves as a contract between us. The appointment outlines the key stages of work that relate specifically to your project and the associated fees. Each scheme is unique and therefore, so are its requirements.

Please note our fees relate to the RIBA stages and are calculated on the scope of services identified from the first consultation or what we feel is the best way to progress i.e. perhaps just a concept if the project is not fully defined. The proposal lists any other consultants that may be needed and survey requirements to enable the designs to develop. It’s a very explanatory letter.


Please note at the beginning of a project we will ask; are we to design to budget or to brief? The difference being, if you design to a budget you may not be able to achieve the brief.

Most commonly clients ask for the brief to be met. We can then work with clients at Stage 3 when tender cost returns on value engineering (reducing price by reducing or amending the design; which may incur further designs fees).



There are a number of assessments that may be required for your project. As standard, what is called a dimensional building survey will be undertaken, whether for a new build or re-model. There may be requirement for a level survey (known as topographical) or arboricultural (tree) surveys to help us formulate the design accordingly.

2 Concept & Planning

Planning Permission  

In Stage 2, initial concept designs are developed, and once signed off by you, are formulated into a comprehensive planning application. Lewis Critchley Architects will then submit this to the relevant local council on your behalf and monitor the application with the relevant case officer.

Planning application decisions take a minimum of eight weeks to process once validated by the council. There is an external council fee for planning submissions, which ranges from £206 for an extension to £462 for a new build.

Unbiased Planning Permission

This is an independent, unbiased process undertaken by either the local planning department or, if necessary, the local planning committee.

Minimise Design Changes

Think of your project like a Rubik’s Cube; every change you make has a knock-on effect. How you want to use the space can have implications on what decisions you make in other areas of the house, and can have repercussions on your project time-frame and budget.

For this reason, before progressing to the planning submission stage, it is very important that you are happy with your design – right down to the little details. Any subsequent alterations once you have gained planning approval may result in needing to make further, amended planning permission applications.

3 Technical Design

This is the detailed design stage of the project, which can commence once planning permission approval has been granted.

By the end of this phase, all aspects of the design will be completed ready to gain a construction cost. Your design is effectively ‘built’ on paper.


Based on the detailed design, we work on one of two procurement routes, depending on your preference. Either a quote and final price negotiation with our preferred contractor for your specific project, or we undertake a traditional tender process whereby 3 construction companies tender for the work.


You will already have been advised about any other consultants. 


Once the procurement route is agreed with you, the tender costs are returned and we evaluate them, advising you of our thoughts once completed. It is obviously important that we get the building to site with costs that you are happy to progress with.

You can expect for work to commence on site knowing around 85% of the overall costs. This is because details such as finishes may not be known, or the subsequent cost of items. This is perfectly normal in construction and the cost of the project can be adjusted once definitive decisions have been made by you on such items.


4 Construction

On Site

Starting work on site is a really exciting milestone for any project, whether it’s a renovation or a new build. We enjoy working closely with contractors to ensure the design concept is executed with precision and any snagging issues on site are ironed out quickly.

The appointed contractor will work from a construction set of drawings we produce, which add interior details and client requirements that may not necessarily have been known at the time of the tender.

While these drawings co-ordinate everything, Lewis Critchley Architects is typically appointed to administer the building contract and oversee construction, making it an even more fluid process. This is designed to give clients peace of mind, providing a valuation of the works on site and payment certificates. This means you only pay for what the contractor has actually delivered on site, work which has been verified and signed off by us.


After the flurry of activity and having embarked on this exciting journey with us, you will find yourself at the final milestone.

Whether a Residential or Commercial project, a refurbishment, a new-build or restoration, you will have a unique, well-crafted, architect-designed building that is both functional and beautiful – and something you feel very proud of.

Architectural Services


As RIBA chartered architects, we offer a full range of architectural services as outlined in the RIBA plan of work. We can deliver all project design, procurement and construction stages as well as tailoring individual work stages to suit your specific requirements. We can start by offering initial advice on a property purchase and an initial consultation with us.

We collaborate with the other specialists required for your particular project. These could include building surveyors, structural engineers, quantity surveyors for cost advice, landscape designers and energy consultants. There is a long list of possibilities and we can guide you through this process and advise on which other consultants are required according to the specifics of your project.

Our extensive experience in many building types enables us to add sophisticated detailing skills to the delivery of the construction drawings of any project.


0. Initial Consultation

  • Develop the client’s brief

  • Assemble the project team

  • ​Pre application discussions to review the planning policy


1. Site visit and survey

  • Develop project brief

  • Complete appraisals, surveys 

  • Agree schedule of services and design responsibilities


2. Concept Design

  • Co-ordinate the project team inputs

  • Develop design through 2D and 3D drawings, models, sketches etc

  • Prepare presentation material if required


3. Developed Design

  • Co-ordinate the team

  • Submit planning applications

  • Review operational strategies


4. Technical Design

  • Detailed drawings

  • Building Regulations

  • Tender action

  • Preparing tender packages


5. Construction

  • Administering contracts

  • Resolving site queries

  • Advising on detailed design solutions

  • Regular site inspections

  • Reviewing progress on site


6. Handover & Close out

  • Updating Project information as required

  • Final inspections

  • Settling final accounts with QS if part of team


7. In Use

  • Post occupancy studies

  • Updating of project information

  • Research and development

We offer a full range of architectural services from inception to completion 

Typical Works Undertaken:

  • Small and Large scale Contemporary and Traditional House Design

  • Small and Large scale House renovations & extensions 

  • Multiple house design 

  • Barn Conversions

  • One off bespoke luxury house design

  • Education projects Schools & Universities 

  • Masterplanning housing,  office parks, universities and mixed use developments 

  • Hotels & Leisure projects 

  • Industrial and Agricultural projects 

  • Commercial office projects and creative workspaces

We use Autodesk Revit 2019 BIM software to produce 2D and 3D Drawings 

As a practice why do we believe that BIM is important?

Ultimately BIM is about improving collaboration and information exchange between different members of the design team. From our perspective BIM has two key benefits in the short-term: providing a better service for our clients; and improving our efficiency and profitability on projects.

By modeling design in three dimensions, Building Information Modeling (BIM) can increase productivity across the board for designers. It surpasses the 2D drawing process by streamlining coordination between collaborators and alerting all users to collisions between systems that previously would not have been detected until the field.

We believe that good communication makes for better design. Our approach is open and collaborative and we use technology as an enabler to help improve the way we work. By sharing data-rich, 3D models, we develop our designs together with our clients, other consultants, contractors and suppliers as well as planners and other stakeholders. This means that the whole team is able to input and be involved in the process from the earliest stages.


Areas Covered:

Gloucestershire, Worcestershire, Herefordshire, Stroud, Malvern, South Wales, Oxfordshire,  Bicester, Wiltshire, Cotswolds, Coventry, Bromsgrove, Birmingham and across the UK.