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Two Storey Extensions: Architectural Drawings & Planning


Fully Compliant Planning Drawings


Building Regulations Drawings


10 Working day turnaround


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Two Storey Extensions Planning Applications & Architectural Design Services

At Extension Plan, we provide architectural design services for homeowners looking to undertake two storey extensions to their properties. Our services include planning applications for two storey extensions and building regulations drawings & notes. We can also provide structural calculations as well as advice relating to the Party Wall Act.

  • RRear Extensions
  • RSide Extensions
  • RWrap Around Extensions
two storey extensions

Two Storey Extension Architectural Services

We offer a range of professional architectural services for homeowners looking to undertake two storey extensions to their properties, including:

Planning Applications

We prepare fully compliant Planning Application drawings which are ready to submit to your local authority. We also manage the application for you.

Building Regulations

We prepare drawings and notes for Building Regulations applications which are ready to be sent to your building control officer for both Full Plans & Building Notices.

Structural Calculations

We work with highly experienced structural engineers who can provide accurate structural calculations and drawings for your project.

Party Wall Surveying

We have experienced RICS Chartered Party Wall Surveyors who can provide impartial advice on the Party Wall Act and its implications for your project.

Architectural Services for Two Storey Extensions

Are you planning to carry out a two-storey extension? At Extension Plan, we specialise in preparing fully compliant, high-quality architectural drawings for planning applications and building regulations purposes.



Our team include highly skilled Chartered Surveyors and experienced architectural designers with decades of experience in residential property extensions, conversions and regulations.


We believe that there is a time and place for expensive architect fees, but a simple home extension often isn’t it. We offer highly competitive fees, without compromising on quality or service.

Quick Turnaround

Simple residential extensions shouldn’t take months to get drawings for. At Extension Plan we typically issue professional drawings within 10 working days from the date we receive the property measurements.

Keen to get started? Click on the button below to get a fixed-fee quote for your home extension.

Our Process

We provide a simple process that doesn’t compromise on quality, and is exactly what you would expect from an architect, only quicker!

Consultation & Measurements

We will discuss your proposals with you and then get your existing measurements for your property. These can be provided by you, or we can carry out a measured surveyor of your property.


We will then prepare your first draft of drawings in accordance with your requirements and to the timescales set out. This is usually 10 working days.


We will then send you your drawings for your review and comment and make any changes required until you are happy with the proposed scheme.

Planning Application

We can then submit your drawings to your local authority online and manage the planning process for you.

Planning Decision

The local authority will then decide your application. This process typically takes 8 to 12 weeks, after which you will receive your fomal planning decision.

Ready to get started, or want a quotation?

If you would like to discuss your plans with us, or would like a free quotation, then don’t hesitate to get in touch.

Where We Work

We are based in London and the South East, though provide our architectural services to homeowners across the UK.

We offer site visits and measured surveys on properties in London, Kent, Surrey, Sussex, and Essex.

We also provide our services across the UK. Simply provide us with your property’s measurements and photographs by following our guide on how to measure your property, and we will do the rest.

Unsure if we cover your areas? Contact us to find out.

Any Questions?

Complete the short form below to quickly enquire about planning drawings for your home extension.


Enter your info and we’ll get right back to you.

The information provided will be used only to follow up on your enquiry.