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Loft Conversions: Architecture & Planning Applications


Fully Compliant Planning Drawings


Building Regulations Drawings


10 Working day turnaround


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Loft Conversion Planning Applications & Architectural Design

At Extension Plan, we provide architectural design services tailored for homeowners looking to enhance their living spaces through a loft conversion. Whether you want a simple rear dormer, an L-shaped dormer, or any other unique layout, we can bring your vision to life. Our services include planning applications for loft conversions, preparation of building regulations drawings and notes, and the provision of structural calculations. Additionally, our team is well-versed in offering advice relating to the Party Wall Act. 

  • RRear Dormer
  • RSide Dormers
  • RFront Dormers
  • RL-Shaped Dormers
  • RMansard Roofs
two storey extensions

Loft Conversions Architectural Services

We offer a range of professional architectural services for homeowners looking to undertake loft conversions 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 Loft Conversions

Are you planning to carry out a loft conversions? 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 loft conversion.

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.


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