Class Q Planning Permission

At Laurence Associates we regularly progress class Q planning applications for our clients. Whilst we work across the country the majority of our class Q projects are on our home turf here in Cornwall. We have therefore developed detailed knowledge and experience of what is likely to be successful at the local level and can advise our clients accordingly.

With planning, architecture and landscape experts all in house at our head office in Truro, and our sister company, Form Consulting Engineers under the same roof, we are proud to be able to deliver a holistic service, taking your project through from inception to completion.

What is class Q?

Class Q is a type of planning permission that allows for the conversion of existing agricultural buildings into residential dwellings. It facilitates the re-use of unused agricultural buildings – which is a sustainable way of boosting the housing supply without new construction.

Achieving a class Q consent can also be a useful way of securing an initial fallback position to form part of a longer term strategy for development.

 

 

 

What’s new with class Q?

New rules have recently been fully implemented and it’s now possible to create 10 dwellings. The maximum cumulative floorspace is 1,000sqm and the maximum floor space for each house is now capped at 150 sqm.

Another key change is that it’s now possible to increase the external dimensions of the building by up to 20cm to better accommodate the conversion. Extensions of up to 4sqm beyond the rear of the existing building are also allowed for the first time.

Existing suitable access to a public highway also has to be demonstrated as part of the application process.

All of the changes have specific criteria to be met.

How can we help you?

We’re happy to carry out a no-obligation site visit to review your building/s and advise on the scope for their conversion and extension under Class Q.

We will be honest with you and if we assess that class Q is not the most suitable approach, we will use our extensive experience to guide you towards a planning strategy that we consider is more likely to help you to achieve your goals. Click here to contact us today.

All posts

Laurence Associates attending Kernow Construction Club

3D Modelling an image speaks a thousand words

Visit Laurence Associates at the Royal Cornwall Show 2026

Planning Appeal Success to Building Regulations Approval

Successful Appeal Secured on Caravan Use and Building Definition

Planning Permission for Community Garden Redevelopment in Newquay

Supporting the Interior Design Journey Through Architecture

Why Do a Self Build?

A Collaborative Approach to Creating Meaningful Spaces

Celebrating 20 Years of Creativity and Leadership with Jason Pledger

St Piran’s Day 2026 – Celebrating Cornwall’s Heritage

Current Vacancies – Town Planners

Self-Build and Custom Build Homes with Laurence Associates

Architecture Vogue – Enys Hill

The Experts

Planning changes from April 2026: why expert advice matters more than ever

Appeal Success – Removing Occupancy Condition

James Vivian Promoted to Associate Director

Class Q Planning Permission

Team Attends Michelmore’s Property Development Club in Exeter

Cornish Replacement Dwelling Submitted for Building Regulations

Attending Women in Business Breakfast at Truro Golf Club

Replacement Dwelling in lieu of Class Q

Planning Appeals Changes from April 2026

Housing Schemes in Cornwall That Truly Work for People

Tom Evans Promoted to Junior Planner

Building for Growth

Waterside Lookout

Understanding the Design Brief Service at Laurence Associates

Appeal Success for Agricultural Workers Dwelling Near Penzance

Laurence Associates prepares for Royal Cornwall Show 2026

Ana Coelho promoted to Senior Chartered Architect

Laurence Associates Attending Townsend Landowner Seminar

A Guide to Our Planning Application Process

Considering a Home Extension?

Building for Growth

Laurence Associates to Exhibit at Devon County Show 2026

Grid Connection Reform and what it means for Renewable Energy Projects

Building Towards a Greener Future: Our Earth Day Commitment

Architecture Vogue – Smallridge Bros

CESW Summit 2026

Celebrating 17 Years of Dedication: James Vivian, Associate Chartered Architectural Technologist

Farm Diversification Opportunities in the Southwest

Securing Planning Permission – Greenbank Hotel Falmouth

New premises & 30 Years in the business

Securing Five Unrestricted Homes in Mawgan Porth

Cornwall Local Plan Update 2028 and What It Means for Development

Architecture Vogue – Humble Cottage

Campsite Certificate and Replacement Dwelling Approval Cornwall

Laurence Associates at Business Fest South West Westpoint

Unlocking Potential Through Replacement

Small Housing Schemes

Natural Light

Elmhurst Energy CPD

Seaside Sensation

Sensitive Dwelling Alterations Approved by Council

Section 73 Approval for Revised Bungalow Scheme in St Erth

Planning Permission Secured for Padstow Conservation Area Outbuildings

Seamless Single Storey Extensions That Complement Your Home

Designing for Legacy, Lifestyle and Longevity

RIBA Safe & Healthy Environments CPD Completed

How to Finance a Self-Build

Permission in Principle Success in St Austell

Town Planner Vacancy – Planning Careers UK

Current Vacancies – Planner / Senior Planner

Replacement Dwelling Approved Following Class Q Success

Laurence Associates to Attend Business Fest

Outline Planning Consent Secured for Two New Dwellings

A positive appeal decision for Laurence Associates

Agricultural Barn Development Advice

Graphisoft UK Awards 2024 – Small Project Of The Year: Under £5 Million

Home Renovation Progress Falmouth

Celebrating 20 Years of Leadership – Richard Marsden

How to Find a Building Plot

Appeal Success Near St Ives

Why Part T Is Changing Commercial Design More Than You Think

What does the new Part O of the Building Regulations mean for a new home?

Planning Appeal Success in Cornwall National Landscape

A Tailored Approach to Conceptual Design

Current Vacancies – Senior Landscape Architect

Committee Success Secures Permission in Principle for New Homes

Construction Excellence Southwest Summit 2026

Rural Exception Scheme Approved in Perran Downs

Barn Conversions Under Class Q and Class R

Permission in Principle Secured for 4 to 9 Dwellings in North Hill

Rural Outbuilding Conversion Secures Planning Consent

Laurence Associates Featured in Salt Magazine

Should I use an Architect?

Affordable Housing Success

Progress Update: Shaping a Bespoke Home

Planning Approval Secured for Multi-Generational Home in Feock

Securing Planning Permission – Community Hall Poundstock

Bespoke Architectural Design Process

From sketch to reality the power of visualisation in design development

Planning Permission Success for Access, Parking & Facilities

Laurence Associates Welcomes New Planning Director

Laurence Associates Welcomes New Design Director

Meet the Laurence Associates Team at Royal Cornwall Show 2026

Non-Material Amendment Success

Laurence Associates Attends Cornwall Council Planning Agents Forum

Happy Easter from Laurence Associates

Creating Flow and Connection Within the Home

What is the Community Infrastructure Levy?

Laurence Associates – Royal Cornwall Show 2025

Energy Consultancy Services at Laurence Associates

Final Days at the Devon County Show for Laurence Associates

Cornwall Building Regulations Update Event 2026

Design and Placemaking PPG out now

Penzance Business Breakfast

Conversion in the Countryside: Securing Planning for a Rural Bothy

Outline Approval for Three New Homes in St Keyne

Property Development Forum

Porthcothan Site Update: Residential Planning Progress

National Planning Policy Framework

Design Appraisals UK | Site Feasibility and Planning Assessments

Replacement Dwellings – Pushing the boundaries of Architecture

Planning Committee Success: Replacement Dwelling Approved

Property Development Forum

Laurence Associates Sponsors Rosudgeon and Kenneggy Cricket Club

Housing Appeal Success in West Cornwall

Navigating Building Regulations in Cornwall: A Design Led Approach

Building Regulations Drawings: Why Detail Matters

Planning Appeal Success for Permission in Principle Scheme

Change of Use Approved: Takeaway to Residential in Cornwall

Energy Statements: Why They Matter for Planning Applications

Coastal Home Design in Devon & Cornwall

Grand Designs

Laurence Associates Returning to the Royal Cornwall Show 2026

Meet the Laurence Associates Team at Devon County Show 2026

Master Planning That Creates Places for the Future

Coastal Cornish Home Design | Contemporary Architecture

Laurence Associates Supports the Peloton Charity Golf Day 2026

Planning Permission Secured in Rock Cornwall

Vickery Holman Market Review

Architecture Vogue – Higher Harlyn

International Women’s Day at Laurence Associates

Architecture Vogue – Eyebrid

Best of Houzz 2017 Design Award

Laurence Associates Expands with New Office in Exeter

Functional Living in a Contemporary Cornish Home

Regen Planning Conference

Neighbourhood Plan Regulation Changes 2026

Why Do I Need a Professional Consultant’s Certificate?

Work Experience Week: Exploring Architecture and Structural Engineering

Community Sponsorship St Just RFC

Cape Cornwall Club Redevelopment | Laurence Associates

Planning and Designing Padel Courts for the UK’s Fastest Growing Sport

Architecture Vogue – Maen Valley

Planning Appeal Success for Equestrian Building

Visit Laurence Associates at the Devon County Show This Week

Outline Planning Consent for Hotel and Restaurant Development in Cornwall

Feock replacement dwelling project overview

Why Involve Landscape Architects in Biodiversity Net Gain Proposals

Planning Approved for Farmhouse Extension on Bodmin Moor

Class Q Conversions: Unlocking the Potential of Agricultural Buildings

Eco development on the sand dunes at Hayle

Grade II Listed Farmstead Planning Success

Designing Homes Shaped by Landscape and Views in Rural Cornwall

SEC1 Compliance & Energy-Efficient Homes in Cornwall

Traditional Barn Conversion Approved | Building Regulations Success

Planning Committee Reforms in England What You Need to Know

Appeal Success: Caravan Site Approved in Cornwall

Restronguet Point – a room with a view

Architecture Vogue – Greenbank Hotel

A Busy Week of Progress Across the Practice

Current Progress on Site in Falmouth

Planning Success in Tintagel

Rural Enterprise – Helping Rural Business Flourish

Four Dwellings Approved Following Outline Consent

Where Design Meets Detail: The Role of Materials in Architecture

Our First Newsletter Is Live | Latest Projects, News & Events

Certificates of Lawfulness Explained

Planning Consent Secured for Methane-Capture Facility

Laurence Associates – Royal Cornwall Show 2024

Cornwall Council ‘Call For Sites’

Planning Approval for Sauna in Protected Landscape

Business Cornwall – March 2026

Town Planner Job Vacancy in Truro | Laurence Associates

Planning Permission Success for Barn Conversion

Every Project Has More Than One Story to Tell

Powering the Future: Repowering Wind Turbines Across the UK

Barn Conversion Approved West Cornwall

Planning Approved for 5 Unrestricted Rural Homes

Laurence Associates at Kernow Construction Club

Breaking Ground: New Project Progress

Cornwall Council Housing Requirement – Laurence Associates

A considered evolution of a familiar form

River Camel Nutrient Neutrality Update 2026: Bodmin Removed

Designing for Approval or Designing to Build?

Construction (Design & Management) Regulations 2015 – March

Architecture Vogue – Sand Dunes

Laurence Associates Attending Ashfords Business Breakfast

Visit Laurence Associates at the Royal Cornwall Show 2026