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Extension Plans

Extension Plans are your local London Architects offering a fast, affordable, one-stop solution for all your planning permission and building regulation needs.

Outbuildings

Call for a free quotation on 020 3633 1082
  • ARB Registered Architect
  • Prices start from £995 plus VAT
  • 12 Working Days Turnaround
  • 020 3633 1082
  • info@extensionplansuk.co.uk

Outbuildings

Extend your home into the peace and quiet of your garden with a custom outbuilding that suits your lifestyle. Whether it’s a home gym, garden office, or a cosy extra room, we’ll help you make the most of your outdoor space.

Our outbuildings aren’t just practical—they’re straightforward too. In many cases, you won’t even need planning permission, which makes the whole process a lot easier.

At Extension Plans, we design tailored garden spaces that feel like a natural extension of your home—comfortable, useful, and right on your doorstep.

Your dream home journey begins here !

Why We're Your Ideal Partner

ARB Architects

Talented architects with proven track records drive our projects.

Cost-Effective

Save money with our Budget friendly services, delivering exceptional results

All Inclusive

Don't worry about outsourcing any aspect of your project with our comprehensive service

Quick Turnaround

Progress to the construction stage with minimum delay with our streamlined service.

Book A Free Consultation With One Of Our Experts

Here To Help With All Your Residential Improvement Requirements

Extension Projects

We specialise in expert design for home extensions, creating bespoke spaces that enhance your lifestyle and increase the value of your property.
loft conversion architect planning permission architects building regulations architect

Loft Conversion Projects

At Extension Plans, our expert loft conversion designs demonstrate how you can maximise your home's potential by transforming unused attic space into functional and stylish living areas.

Outbuilding Projects

As well as extensions and loft conversion we also design outbuildings that are both functional and beautifully tailored to your needs.

Our Services

We pride ourselves on delivering an all-inclusive architectural service to our clients, with a vast amount of experience, with rear extensions, loft conversions, and outbuildings. By working with us, you eliminate the need to outsource various components of your project, streamlining the entire architectural process under one roof.

Site Survey

Our dedicated surveyor will visit your property to gather all of the necessary measurements and essential site information.

Architectural Drawings

Upon appointing our services, you'll be paired with the most suitable member of our design team, ensuring a tailored approach to your project.

Planning Submission

We take the hassle out of the approval process by handling the submission of all planning applications to the local council.

Building Regulation Drawings

Our designers create detailed building regulation drawings with precision, ensuring full compliance with standards and reducing potential construction issues

Building Control Submission

Our team is committed to providing a hassle-free experience, and that includes submitting the building control application on your behalf. Trust us to handle the paperwork and navigate through the process

Structural Engineering Service

We partner with expert engineers to provide precise structural calculations, ensuring the safety and stability of your construction.

Finding a Builder

Once the paperwork is complete, we arrange build quotes from vetted, quality-checked builders, ensuring your project is in skilled hands for a smooth construction process.

3D Visuals

Enhance your design experience with realistic 3D drawings from our dedicated team, offering a detailed preview of your finished space.

Party Wall Notices

We collaborate with a party wall surveyor who handles the serving of party wall notices on your behalf, ensuring the process is managed as efficiently as possible.

What Our Customers Say

We have over 600, five star reviews across our online platforms. Check out our Trustpilot reviews here 

Unlock the potential of your property

Schedule a free consultation! We would love to offer free advice, discuss your design ideas or get things moving with your project
contact us

How Do We Differ From Other Architects?

  • Features

  • Traditional Architects 

  • Online Competitors 

  • Fixed Price

  • Immediate Start

  • Planning Design Drawings 

  • Flexible project timeline

  • Qualified Architects 

  • Submission of all relevant applications

  • Building Regulation Drawings 

  • Advance Drawing Technology

  • Flexible Remote Meetings 

    • FAQs

    Our design process begins with an initial consultation with your dedicated designer. We will discuss your vision, requirements and we will provide ideas for your design based on previously completed projects. From there, we move through conceptual design providing a first draft plan for your consideration. Following this we can revise the plans in any way you like to ensure you a completely happy with the design. 

    The timescale of a project differs, depending on the proposal. We can visit your property within a couple of days and have the first draft plans with you in roughly 14 days. 

    In some cases, building work can begin within a couple of weeks. In others, the timescale can be up to 4 months, depending on your project’s requirements. 

    Yes, we work with a dedicated team of experienced engineers who take care of all structural calculations and beam specifications. This allows us to manage every technical detail, so you won’t need to outsource this essential service.

    Yes, we employ fully qualified architects within our design team to ensure our plans are created to the highest possible standard. 

    With over 7 years of collaboration with every  council in London, we’ve built a trusted relationship with their planning officers and are well-versed in their guidelines. This expertise ensures a smooth and efficient planning process for your project.

    Yes, we organise all necessary applications on our customer’s behalf. We will submit the required application and act as the agent throughout the process to ensure approval is received as swiftly as possible

    Yes, we create our plans with industry-leading software and are able to create 3D images to allow you to accurately visualise your design. 

    In most cases, we have trusted building contractors that we have worked with in your area, in the past and we would be happy to organise build quotations for you to consider 

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