House Extensions

House extension drawings: your building project starts here

Need more space? House extension drawings are the first step towards a bigger home. Find out more about our architectural services…

Transform your home with an extension

If you want to increase the size of your home, then a house extension offers endless possibilities.

Whatever style of property you have, there will be ways to extend it and provide the extra living space you need. These include:

  • Front house extensions
  • Rear house extensions
  • Side of house extensions

With decades of architectural experience, we will work with you from that initial idea through to the final build, providing expertise every step of the way.

Together with designs and technical specifications, we can provide house extension drawings for each stage of the design process.

Get in touch to start your project today.

House extensions may require full planning permission or could fall under permitted development rules
A completed house extension

Our architectural drawing service can turn your extension plans into reality

Includes planning permission and building control drawings and structural design

Quick turnaround on drawings and we can submit the application on your behalf

UK based, fully insured and operating nationwide

Start Your Project
Concept design and house extension drawings

Whether you already know what you want, or need help to develop your ideas, our expert designers, architects and engineers will work with you to find the most suitable options for your project.

This will be based on your requirements, budget and the survey information of your property.

Our architectural and structural design teams work side by side, offering a comprehensive and co-ordinated service.

Your project team will refine your ideas and turn them into concept designs and house extension drawings, with unlimited revisions until you are happy with them.

Whilst we work remotely, we offer online screensharing and video calls to discuss your project.

Find out more about our concept design & planning packages.

Design & Planning Packages
We can use planning permission drawings to create external visualisations of your plans, like in these house extension plans
Measured surveys for house extensions

Before we can produce concept design and planning drawings for a house extension, we may require a measured survey.

Measured surveys provide some of the key information we need, including:

  • Layout and size of rooms
  • Ceiling heights
  • Door and window positions

You can carry out the survey yourself or we can do it for you, for an additional charge.

Find out more about our measured survey packages.

The planning application

We will perform a full check of your house extension project against local and national planning permission advice and rules to determine the type of planning application required.

Your project may require planning permission, or it may be completed under permitted development.

Whatever your project requires, we will prepare a comprehensive package of house extension drawings within 2 to 3 weeks.

CR Design will submit the planning application on your behalf and will also act as your agent with the council for the duration of the project.

Find out more about our concept design & planning packages.

Building control applications

Drawings for house extensions must meet building regulations, and we'll have yours ready to submit within 2 to 3 weeks.

Like the planning application, we will submit the building control application on your behalf, as well as dealing with the council as your agent.

Find out more about our building control & construction specification packages.

Structural Design

Most house extensions will require a structural design report. We can prepare these structural designs (also known as structural calculations) for your project and submit them as part of the building control application.

Start Your Project
house extension4
Visualisations of house extension plans
Get in touch
Working with third parties

We can work with third party architects, engineers and builders to ensure they have everything they need to complete your home extension project.

Alternatively, we can work with designs and home extension drawings that have already been prepared by third party architects.

Find out more about working with us.

Our packages for house extension drawings

We can provide house extension drawings for each stage of your building project, as well as technical and structural specifications and expert support. Our packages cover:

  • Measured survey
  • Concept design and planning application drawings
  • Building control drawings and construction specifications
  • Structural design and calculations

Our design packages are suitable for all types of house extensions, garage and loft conversions, renovation and self-build projects.

Inspiration Gallery

House extensions may require full planning permission or could fall under permitted development rules
5 residential structural engineering design trends for 2024
home loft conversions
A glazed gable end on a modern home
Building regulations must be followed for house extensions, such as adding a roof lantern to increase natural light
A home porch addition on a modern house
Small house extension with a duopitch roof
An open plan layout in a modern kitchen, dining and living area
More >

Other Architectural Projects

Loft Conversions

Whether it's for an extra bedroom, a home office or a hangout area for the kids, your loft can be transformed into superb living space.

More >
Garage conversions

As garage conversion specialists, we can help make your building plans a reality with planning, technical and structural drawings.

More >
New Builds

We will work with you from that initial idea through to the final build, providing expertise every step of the way.

More >

Enquiry form

House extension enquiry

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    5-star rated service

    "CR Design were brilliant from first contact. They were extremely efficient and were very prompt in answering all my questions in relation to our garage conversion. They were very proactive in communicating with us and I only have positive things to say. I would not hesitate to use them again for our next project."

    "Chris worked with us during the planning and design stage of our downstairs remodel. He was very patient as we went through the design iterations and with his team, took care of the drawings and building control application. We couldn't recommend more highly the professional and friendly service."

    "Chris has provided us with a fantastic service. Great job and communication throughout....Very prompt service, highly recommended."

    "Caroline & Christopher of CR Design Services were great to work with. They were both very supportive, efficient and very knowledgeable. I would have no hesitation in recommending them and working with them in the future. Thanks."

    "Used CR Design Services for calculations and drawings for an extension/new build. We found the company through a web-search. Amazing response and turnaround times and Chris was always happy to help if we needed to changes to the design. High quality service and excellent value. Highly recommend and would definitely use again."

    "CR Design were brilliant from first contact. They were extremely efficient and were very prompt in answering all my questions in relation to our garage conversion. They were very proactive in communicating with us and I only have positive things to say. I would not hesitate to use them again for our next project."

    "Chris worked with us during the planning and design stage of our downstairs remodel. He was very patient as we went through the design iterations and with his team, took care of the drawings and building control application. We couldn't recommend more highly the professional and friendly service."

    "Chris has provided us with a fantastic service. Great job and communication throughout....Very prompt service, highly recommended."

    "Caroline & Christopher of CR Design Services were great to work with. They were both very supportive, efficient and very knowledgeable. I would have no hesitation in recommending them and working with them in the future. Thanks."

    "Used CR Design Services for calculations and drawings for an extension/new build. We found the company through a web-search. Amazing response and turnaround times and Chris was always happy to help if we needed to changes to the design. High quality service and excellent value. Highly recommend and would definitely use again."