Thornbury Plan Making sense of planning, property and place

Thornbury Plan

Making sense of planning, property and place

Latest Articles

The Five-Square-Metre Threshold: When a Front-Garden Driveway Still Needs Planning Permission
Planning Applications

The Five-Square-Metre Threshold: When a Front-Garden Driveway Still Needs Planning Permission

Replacing a lawn with parking can look like ordinary domestic improvement, but the planning system treats front-garden hardstanding as development with its own drainage conditions. This guide explains the five-square-metre trigger, the permeable-surfacing test and the records worth keeping before the paving goes down.
The Date That Decides: Proving Immunity from Planning Enforcement in 2026
Property Due Diligence

The Date That Decides: Proving Immunity from Planning Enforcement in 2026

Planning enforcement is not always forever. Statutory time limits can turn an unauthorised building or use into lawful development, but only where the dates and evidence hold up. This 2026 guide explains the four-year and ten-year rules, the role of lawful development certificates, and the paper trail buyers should demand.
The Weight of Informal Counsel: Pre-Application Advice in a 2026 Planning Submission
Planning Applications

The Weight of Informal Counsel: Pre-Application Advice in a 2026 Planning Submission

Pre-application advice is often treated as a council blessing, yet it is rarely binding and can vary between officers and authorities. This article sets out how to test the guidance, challenge it where it departs from policy, and record it so that it strengthens rather than weakens a 2026 application.
The Second Kitchen Question: Planning and Council Tax Tests for Family Annexes in 2026
Property Due Diligence

The Second Kitchen Question: Planning and Council Tax Tests for Family Annexes in 2026

An annexe can look like a family arrangement while operating as a separate home. This guide sets out the planning and council tax tests that matter in 2026, and how to structure consent before a granny flat becomes an unauthorised dwelling.
First Spade, Last Chance: Building a Defensible Commencement Record
Planning Applications

First Spade, Last Chance: Building a Defensible Commencement Record

A planning permission is a wasting asset. This article explains the statutory deadlines that apply in 2026, the difference between a material start and a token gesture, and the documentary trail a developer should assemble before the clock runs out.
The Rights That Leave Without a Letter: Reading Article 4 Directions Before You Commit
Planning Applications

The Rights That Leave Without a Letter: Reading Article 4 Directions Before You Commit

A permitted development right can be withdrawn by a single notice, and the site you are pricing today may not carry the same fallback position in twelve months. This guide explains how Article 4 directions work, what evidence a council must produce to justify one, and how to test a direction before it changes the arithmetic of your scheme.
Measuring Quiet: Air Source Heat Pumps, Permitted Development and the 42 dB Boundary in 2026
Planning Applications

Measuring Quiet: Air Source Heat Pumps, Permitted Development and the 42 dB Boundary in 2026

Air source heat pumps are increasingly common, but their planning status is conditional rather than automatic. This guide explains the permitted development route, the noise test that decides most cases, and the siting evidence homeowners should assemble before an installer arrives.
From Shopfront to Front Door: Due Diligence on a High Street Conversion in 2026
Property Due Diligence

From Shopfront to Front Door: Due Diligence on a High Street Conversion in 2026

An empty high street unit looks like the simplest conversion in the planning system. In practice, Class E to C3 permitted development is decided by vacancy periods, Article 4 directions, retail frontage policy and a fire strategy that is far easier to write before completion than after.
Ten Per Cent, Approved Before Groundworks: Biodiversity Net Gain on Small Sites in 2026
Planning Applications

Ten Per Cent, Approved Before Groundworks: Biodiversity Net Gain on Small Sites in 2026

Biodiversity net gain has applied to small sites since April 2024, yet the exemptions, the small sites metric and the credit market remain widely misread. This guide explains when the ten per cent obligation bites, how the national register and off-site units work, and how to sequence an ecology report so it does not become a post-submission panic.
Common Ground: What Really Decides a Village Green Application in 2026
Planning Applications

Common Ground: What Really Decides a Village Green Application in 2026

Registering a field as a town or village green remains one of the most effective ways to obstruct a housing scheme — and one of the easiest to get wrong. This guide examines the twenty-year use test, the trigger-event timetable, and the evidence that genuinely moves a registration authority or an inspector.
The Levy Doesn't Forgive: Ten Ways Self-Builders Lose Their CIL Relief
Property Due Diligence

The Levy Doesn't Forgive: Ten Ways Self-Builders Lose Their CIL Relief

Self-build relief from the Community Infrastructure Levy can be worth tens of thousands of pounds, yet it is claimed and lost on procedure rather than principle. These ten traps — from commencement notices to annexes and apportionment — are the ones that most often turn a modest project into a full levy bill.
When the Condition Says Farmer Only: Buying, Living With and Untying an Agricultural Occupancy Restriction
Property Due Diligence

When the Condition Says Farmer Only: Buying, Living With and Untying an Agricultural Occupancy Restriction

A farmhouse with an agricultural tie can look like a bargain until a lender declines it and the search agents stop calling. This is a practical guide to how the condition is tested, the evidence that shifts a council, and the traps waiting for the unprepared buyer.
Phosphate Credits and Stalled Sites: The Real Shape of the Nutrient Neutrality Logjam
Planning Applications

Phosphate Credits and Stalled Sites: The Real Shape of the Nutrient Neutrality Logjam

Approvals are still being held hostage by river catchments in 2026, but the obstacle is no longer the science. It is the supply, price and paperwork of mitigation. Here is how the nutrient neutrality machinery actually works, and what to do before you commit to a site.
The Parish Premium: How Local Design Codes Are Quietly Repricing Rural England
Property Due Diligence

The Parish Premium: How Local Design Codes Are Quietly Repricing Rural England

Neighbourhood plans were sold as a modest extension of local democracy. Fifteen years on, the design codes attached to them are shaping what can be built, where, and at what price. For buyers in rural and semi-rural England, the parish boundary is now a valuation line.
Built Before You Checked: Nine Tests That Decide Whether a Garden Office Is Lawful in 2026
Planning Applications

Built Before You Checked: Nine Tests That Decide Whether a Garden Office Is Lawful in 2026

Thousands of garden studios and annexes go up each year on the assumption that permitted development covers them. Often it does only in part. This guide sets out, in order, the tests that determine whether an outbuilding is genuinely lawful — and how to fix the position before the concrete goes down.
The Postcode Planning Divide: Navigating England’s Fragmented Local Plans in 2026
Property Due Diligence

The Postcode Planning Divide: Navigating England’s Fragmented Local Plans in 2026

England’s local plans are being adopted, paused and rewritten at very different speeds, producing a postcode lottery for homeowners and small developers. This analysis explains how plan status changes planning prospects and how to carry out due diligence when the local plan is in flux.
Refusal Reversed: A Practical Guide to Winning Planning Appeals in 2026
Planning Applications

Refusal Reversed: A Practical Guide to Winning Planning Appeals in 2026

A refusal is not the end of the planning process, but an appeal is not a second application. This practical 2026 guide explains the three appeal routes, realistic timelines and costs, the grounds that tend to succeed, and a checklist for building a case that the Planning Inspectorate can test.
Reading Between the Lines of Outline Consent: A Buyer’s Guide to Reserved Matters and Real Buildability
Property Due Diligence

Reading Between the Lines of Outline Consent: A Buyer’s Guide to Reserved Matters and Real Buildability

An ‘outline planning permission granted’ line in a property listing can flatter a site’s true development potential. This analysis sets out why reserved matters, conditions and infrastructure contributions matter before exchange, and how buyers and self-builders can separate genuine consent from wishful thinking.
The Pre-Validation Audit: Twelve Questions to Settle Before a 2026 Planning Submission
Planning Applications

The Pre-Validation Audit: Twelve Questions to Settle Before a 2026 Planning Submission

Validation delays rarely stem from the quality of the design alone; they usually begin with a missing document, an inconsistent plan or an unanswered local requirement. This pre-submission audit sets out twelve questions for homeowners and small developers to resolve before the council starts assessing the scheme.