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Knowledge centre

Residential planning and architecture guides.

Clear, architect-reviewed guidance for homeowners, developers and property investors across England. Each guide explains the rules, practical design decisions, common risks and the next steps for a real project.

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Plan with clearer information.

Start with the guide closest to your project, then follow the related links to understand planning, technical design, cost and approval requirements together.

01
Planning and extensions

Do I Need Planning Permission for a House Extension?

A practical guide to planning permission and permitted development for single and two-storey house extensions in England.

9 min read · Reviewed 22 July 2026
02
Planning and extensions

Single-Storey Extension Planning Rules

Key permitted development and planning rules for rear, side and wrap-around single-storey extensions.

9 min read · Reviewed 22 July 2026
03
Planning and extensions

Two-Storey Extension Planning Rules

Planning considerations for two-storey side and rear extensions, including amenity and street character.

9 min read · Reviewed 22 July 2026
04
Loft conversions

Loft Conversion Planning Permission

When loft conversions need planning permission and how permitted development rules apply.

9 min read · Reviewed 22 July 2026
05
Architect fees and appointments

How Much Does an Architect Cost for a Residential Project?

How residential architect fees are structured for surveys, planning applications and Building Regulations.

8 min read · Reviewed 22 July 2026
06
Building Regulations

Building Regulations Drawings Explained

What Building Regulations drawings include and why they matter before construction.

10 min read · Reviewed 22 July 2026
07
HMO conversions

House to HMO Conversion Planning Guide

Planning, licensing, space standards and fire-safety considerations when converting a house into an HMO.

11 min read · Reviewed 22 July 2026
08
Residential conversions

Converting a House into Flats: Planning and Building Regulations

A guide to planning permission, space standards, sound insulation and fire separation for flat conversions.

11 min read · Reviewed 22 July 2026
09
Permitted development

Does a Garden Room Need Planning Permission?

Permitted development rules for garden offices, studios, gyms and residential outbuildings.

8 min read · Reviewed 22 July 2026
10
Planning law and evidence

Lawful Development Certificates Explained

When to apply for a Lawful Development Certificate for proposed or existing residential works.

9 min read · Reviewed 22 July 2026
11
Planning strategy

Planning Application Refused: What Should You Do Next?

Options after a residential planning refusal, including amendments, resubmission and appeal.

9 min read · Reviewed 22 July 2026
12
New homes and development

Planning Permission for a Replacement Dwelling

Key planning considerations when replacing an existing house with a new dwelling.

10 min read · Reviewed 22 July 2026
13
Planning process

How Long Does Planning Permission Take?

Typical planning application timescales and the factors that can delay residential decisions.

8 min read · Reviewed 22 July 2026
14
Planning and Building Regulations

Planning Permission vs Building Regulations

The difference between planning permission and Building Regulations approval for residential work.

8 min read · Reviewed 22 July 2026
15
Extension costs

How Much Does a House Extension Cost in the UK?

Key factors affecting extension construction costs, professional fees, VAT and contingency allowances.

10 min read · Reviewed 22 July 2026
16
Extension design

Rear Extension Design Ideas for UK Homes

Practical rear extension ideas for light, layout, glazing, materials and garden connection.

9 min read · Reviewed 22 July 2026
17
Planning and extensions

Wrap-Around Extension Planning Guide

Planning and design considerations for combined side and rear wrap-around extensions.

9 min read · Reviewed 22 July 2026
18
Planning and extensions

Side Extension Planning Rules

Permitted development and planning considerations for side extensions to detached and semi-detached homes.

8 min read · Reviewed 22 July 2026
19
Architectural services

Do I Need an Architect for Planning Permission?

When an architect adds value to a residential planning application and what information is normally required.

8 min read · Reviewed 22 July 2026
20
Planning process

Residential Planning Application Validation Checklist

Common drawings, forms, reports and information needed to validate a residential planning application.

9 min read · Reviewed 22 July 2026
21
Planning process

How to Discharge Planning Conditions

A practical guide to pre-commencement conditions, approval of details and condition discharge applications.

9 min read · Reviewed 22 July 2026
22
Permitted development

Permitted Development Rights Explained

How permitted development rights work for extensions, lofts, outbuildings and residential alterations.

10 min read · Reviewed 22 July 2026
23
Heritage and planning

Planning Permission in a Conservation Area

Design and planning considerations for residential work in conservation areas.

10 min read · Reviewed 22 July 2026
24
Heritage and planning

Extending a Listed Building

Planning permission, listed building consent and design principles for extending a listed property.

11 min read · Reviewed 22 July 2026