Big Discount Plans

18+ Years of Architectural Design Experience

At Big Discount Plans, we produce house extension and loft conversion drawings, helping clients across Greater London turn their ideas into approved projects. Our goal is simple: deliver exceptional design services at unbeatable value.
From your first consultation to planning approval, we handle everything — providing expert advice, transparent fixed prices, and quick results.

Our services

We provide a complete range of professional architectural and planning services — handling every stage of your project from concept to approval.

The One-Stop Shop for All Your Design Needs

High-quality, approved drawings delivered in as little as 1 week.

Planning Consultation

We start by understanding your goals and guiding you through the planning process.
Our experts offer clear, practical advice to maximise approval success and help you make informed decisions.
We handle all aspects of your planning application — from design strategy to submission — ensuring compliance with local council requirements.

Planning Drawings

Our detailed planning drawings form the foundation of every successful project.
We prepare accurate, scaled designs for extensions, loft conversions, new builds, and renovations — tailored to your property and objectives.
We also act as your planning agent, liaising directly with your local council to streamline approval.

Building Regulation Drawings

Once planning is approved, we produce comprehensive technical drawings for construction and building control approval.
These include floor plans, sections, structural details, and specifications that ensure your project meets all legal and safety standards.
Our clear, compliant drawings help builders execute your project with confidence and precision.

Structural Calculations

Working alongside qualified structural engineers, we provide all necessary calculations for beams, load-bearing walls, foundations, and roof structures.
Our detailed reports guarantee your project’s stability and compliance with current building regulations — saving time and avoiding costly redesigns later.

Party Wall Services

Our experienced Party Wall Surveyors handle notices, agreements, and full compliance with the Party Wall etc. Act 1996.
We manage communication between property owners to ensure your project runs smoothly and legally, protecting your rights and avoiding disputes.

Why choose us

Every client receives:

• FREE Consultation with an experienced design advisor

• FREE Site Measured Survey (internal & external)

• FREE Three Drawing Amendments (client, planning, or building control)

• FREE Re-Submission Service (if refused)

• FREE Design Pack (PDFs) on request

• FREE Agent Service (we handle all council correspondence)

• FREE Planning Statement with every submission

• FREE Building Control Registration

Exceptional Service. Outstanding Value. Proven Results.

We offer more than any competitor — at no extra cost.