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.
Expert Residential Design
- ARB Registered Architect
- Prices start from £995 plus VAT
- 12 Working Days Turnaround
- 020 3633 1082
- info@extensionplansuk.co.uk
We are with you all the way
Welcome to Extension Plans, your trusted team of architects in London, specialising in affordable, high-quality residential designs. From rear extensions and side extensions to loft conversions and full-home transformations, we’re here to turn your vision into reality with a personalised, London-focused approach.
Experience a new standard of architectural design with our all-inclusive, cost-effective architectural service. We combine attention to detail with a commitment to quality, ensuring every space we create aligns with your vision and lifestyle.
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
We are currently offering a 100% money back guarantee if planning is refused
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.
100% Money Back Guarantee
We’re proud to offer a 100% Money Back Guarantee on our drawings. If your planning application is refused, we’ll refund the cost of the drawings in full. Your success is our top priority.
*Guarantee is subject to certain conditions.
100% Refund GuaranteeBook A Free Consultation With One Of Our Experts
We pride ourselves on delivering an all-inclusive residential architecture service to our clients, with a vast amount of experience, with rear extensions, loft conversions, and outbuildings.
By working with Extension Plans, you eliminate the need to outsource various components of your project, streamlining the entire architectural process under one roof.
Architectural Drawings
Our experienced team has worked on every type of residential alteration throughout the years and we are excited to share our knowledge with our customers!
Building Regulations
Our team excels at creating precise, compliant drawings, ensuring alignment with safety, thermal, and structural requirements.
Structural Calculations
Once our architects have crafted your vision into architectural drawings, our engineer steps in to produce precise structural calculations.
Party Wall Services
As part of our comprehensive architectural services, we include the preparation of the party wall notices within our process.
Here To Help With All Your Residential Improvement Requirements
We have completed work across the whole of London. Check out our completed project locations
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.
How It Works
Our streamlined process ensures you’re matched with the ideal member of our design team, who will guide you through every step, from concept to completion
Book A Free Consultation With One Of Our Experts
What Makes Us Stand Out From The Crowd
Unlimited Support
Call our office at any time to discuss your project. We are also on hand for questions from your builders until construction has been completed.
We handle everything
We have an experienced administration team to submit and handle your applications so you don't have to.
Immediate Start
We are available to start work on your project within a couple of days!
Dedicated Designers
You will be working directly with the member of our team that is best suited to your project.
Detailed Drawings
Our drawings are created with the best architectural software available ensuring your plans are created to the highest standard.
Fixed Prices
We offer fixed, competitive prices so you can budget accurately for your build.
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
FAQs
How does the design process work?
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.
What is the typical timeline for a residential design project?
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.
Do you provide engineering calculations?
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.
Are you a fully qualified architect?
Yes, we employ fully qualified architects within our design team to ensure our plans are created to the highest possible standard.
Do you have a lot of experience with my local council?
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.
do you assist with planning applications?
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
Do you offer 3D plans and renders?
Yes, we create our plans with industry-leading software and are able to create 3D images to allow you to accurately visualise your design.
Can you recomend builders to work with?
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
