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Frequently Asked Questions

Our promise to our customers. To provide quality Architectural drawings with a quick turn around, while not cutting corners or compromising in quality.


What does Extension Plans help with?

At Extension Plans, we provide an all encompassing planning and building regulation service.
This includes;

  • Measured site surveys
  • Architectural planning design drawings
  • 3D design models
  • Submission of all relevant design applications to your local council
  • Party wall notices for neighbouring properties
  • Building regulation drawings and specifications
  • Structural engineering calculations

Our I’m is to remove all elements of stress from the planning and design phase by providing a one stop solution for all your construction needs. Following our service you will be armed with all the designs and approvals to pass to your builder for the commencement of construction.

How do you provide such a quick turnaround

We leverage the latest architectural software and tools to enhance the efficiency of our design workflow. Our team of skilled architects, with years of experience in the field, has honed their expertise to navigate the design process seamlessly. By eliminating unnecessary steps and optimising our internal processes, we ensure that your bespoke design plans are created with precision and delivered with a very fast turnaround.

Are you a fully qualified architect?

Yes, we employ full qualified ARB registered architects to ensure our architectural drawings are completed to the highest possible standard. Our design team includes, Architects, technicians and interior designers. All of our work, all of which have lots of experience in the industry.

Do I require planning permission for my project?

A lot of projects can be completed without the need for planning approval. 

The team at Extension Plans  can help you determine if your plans fall under something called ‘permitted development’. If so, we can move directly onto the construction stage without the need to wait for planning approval. Feel free to call our office to discuss whether your project needs planning approval in more detail.  

What happens if my planning application is refused?

If an application is refused, the council will provide the reasons for the refusal so we have a basis to form a redesigned proposal.  We will analyse the issues that have been raised and advise on solutions to satisfy the council’s requests.

We will then resubmit your application and also alert you at this point if there are any additional costs.

We have years of experience with the planning process and receive planning approval for the vast majority of applications that we submit.

Can I carry out my own survey?

Yes! All you need is a tape measure. Add the necessary measurements of your property onto a quick sketch and we will do the rest. If you have estate agents floor plans you can add the measurements to these plans to make the process even easier. If you neighbour has a similar layout and has previous architectural plans then we could also work from these. Please see our guide for more detail.

How long until we hear back from the council?

A normal planning application is 8 weeks long however, the countdown doesn’t start until the council have validated the application which can take a couple of weeks. Upon validation the council aim to determine the outcome of the application within 8 weeks.


What is building control?

A building control application must be submitted prior to commencement of construction works for all building projects. Building control are responsible for checking and approving your building regulation drawings and specifications and your structural engineering documents. You will be appointed a building inspector who will liaise with your builder and visit site throughout construction to ensure building regulations are being complied with.

Do you visit site during the build?

Project management is not a service that we offer, nor do we believe it is something required for most projects. If a competent contractor is capable of running the majority of residential extension projects. Building control are appointed to liaise with the builders during construction to ensure the works are being completed to the necessary standard.

What is the difference between the council building control and a private service?

Your building control application can be submitted to either the council or a private building control firm. As a private building control Is a business, they have a higher focus on customer service and are generally more readily available for queries and site visits. The final sign off that you receive from a private building control company is exactly the same as the approval you would receive from the council.

How soon can I start building?

We advise waiting on approval of a certificate of lawful development prior to commencement of construction if you project falls within permitted development guidelines. Once you have the necessary approval from the council for the design of your project a building control application is submitted. We recommend submitting the building control application at least 3 weeks prior the start of your build to allow building control the time to approve your documentation. You are however within your rights to start building works just 5 days after submitted your building control application.


How is the fixed price guaranteed?

The majority of architects work on an hourly rate or a percentage of the build costs which makes it impossible to offer a final price until works have been completed. This can lead to unforeseen costs and an unexpectedly high final invoice. We have streamlined our service to provide you with only that which is necessary. We charge for your drawings only and will give you the finished price before you appoint our service, this includes one revision of your first draft plans.

Do you really submit applications for free?

Included in our cost is the purchase of an Ordnance survey map, this with your completed plans is everything the council need to process your application for almost all applications. We submit the application to the council and act as the agent throughout the process to ensure your application is processed as swiftly as possible, the council application fee is not included within our quotation.

  How do I get a quotation and start the process?

Feel free to call our office or send us an email with your address and a description of your proposal. We will provide a fixed fee quotation and if you are happy to proceed, organise a site survey of your property. Once this has been completed we will get to work on your architectural design drawings.

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