Description

Your Two Storey Rear Extension Project — A Practical Guide for Homeowners

Thinking about adding space on two floors at the back of your house?

Your Two Storey Rear Extension Project is an illustrated digital guide designed to help homeowners in England understand the decisions involved in planning and building a two storey rear extension.

Whether you’re exploring ideas or getting ready to speak to a builder, this guide helps you work through the project step by step.

What’s inside?

Permitted development rules: Understand the conditions that may allow a two storey rear extension without a planning application, including distance to the rear boundary, roof form and the treatment of upper floor side windows, and when a full application may be needed.
Planning your project: A clear, step-by-step journey from initial ideas through to construction.
Extension design: Consider how the ground and first floor layouts work together, stair and bedroom arrangements, roof form, window positions and privacy for you and your neighbours.
Structural considerations: Understand why a structural engineer is normally required, what they produce and how that sits alongside the architectural drawings.
Costs and budgeting: Work through the main costs of building over two floors, including foundations, structure, roof, glazing and internal finishes.
Drawings and approvals: Understand the role of architectural drawings, planning permission, Lawful Development Certificates and Building Regulations.
Building Regulations: Understand how Building Regulations apply to floor and roof structure, stairs, fire safety, insulation and drainage across two floors.
Choosing builders: Prepare for quotations and discussions with contractors.
Practical checklists and worksheets: Keep track of decisions, costs and next steps.

Your £15 Drawing Package Discount

Your guide includes the coupon code TWOSTOREY15, giving you £15 off our Two Storey Rear Extension Drawing Package.

Drawing package price: £1,400
Price with TWOSTOREY15: £1,385
The drawing package is a separate purchase from this guide.
The code applies to that drawing package only. It cannot be used against this £15 guide.

Our drawing packages are fixed, pre-designed products supplied as sold. They are not bespoke designs, site-specific plans, or a complete planning or Building Control submission, and they do not include revisions or customisation.

Digital Download

Illustrated PDF guide
Designed for homeowners in England
Download electronically after purchase
No physical book will be posted
Read on a phone, tablet or computer, or print for personal reference

Important Information

This guide provides general information and practical project guidance. It does not assess the planning status of your specific property, confirm permitted development rights, replace professional advice or constitute planning permission, a Lawful Development Certificate or Building Control approval.

Planning restrictions and requirements depend on your property and proposed works. Check the applicable requirements before proceeding.

Before you buy

This package is for work that genuinely qualifies as Permitted Development. It is not planning permission and not a Lawful Development Certificate.
Building Regulations and Building Control approval are separate and still apply where relevant.
Structural engineering design and calculations are not included and must be provided separately by a qualified Structural Engineer where required.
Standard extension packages are designed as bolt-on additions. They do not include removing structural walls or forming large structural openings in the existing house.

Full detail in our Terms, Cancellations & Refunds.

Not sure this package is right? Ask PERMITTED.