Insights & Guides.
Practical advice on planning, permitted development, pricing and what to expect when you extend your home. Written by the team who builds it.
Lighting Plan for an Extension: Layout, Spacing and Timing
How to plan lighting for a single-storey rear extension: reflected ceiling plan, downlight spacing over worktops, Part P rules and when to decide it all.
Aluminium vs Timber Windows: Which Suits Your Home?
Aluminium or timber windows? Compare cost, lifespan, upkeep, U-values and planning rules, plus what each means for a new rear extension in England.
Defects Liability Period: What Homeowners in England Need to Know
How long a defects liability period lasts, when it starts, who fixes what, and how it differs from your legal rights and warranty cover on a home extension.
Full Plans vs Building Notice in England: 48 Hours or Plan Checks
Compare full plans and building notice for an England rear extension. Learn how each route affects checks, inspections, certificates, and delay risk.
Planning Permission Expiry in England: A Lawful Start Beats the Clock
In England, permission usually lapses after three years unless the notice says otherwise. Learn what counts as a lawful start and how to keep it live.
One Contract for UK Homeowners: Design and Build Benefits
See how design and build gives UK homeowners one firm, earlier pricing, faster sequencing, and checks for bespoke finishes and Building Regulations.
30 or 8 l/s? Utility Room Ventilation for Homeowners in England
See what utility room ventilation requires in England: 30 l/s intermittent or 8 l/s continuous, plus fan choices, damp checks, and extension planning.
Parking Bay Suspension Costs in England: Camden’s 17-Day Lead Time
Compare council fees and lead times for parking bay suspensions in England, with examples from Camden, Westminster, and Oxfordshire to help you apply.
Kitchen Extractor Ducting in England: Avoid a Part F Sizing Mistake
Choose kitchen extractor ducting: match hood airflow to diameter, reserve flexible hose for short runs, and check Approved Document F before you buy.
Plaster drying time for UK homeowners: 1 to 2 weeks, not a deadline
Plan decorating around plaster drying time, not a fixed date. Learn the 1 to 2 week range, check for pale, even colour, and leave 24 hours after a mist coat.
Temporary Kitchen Setup: UK Hire Starts at £70 a Day
Set up a temporary kitchen in the UK before renovation work starts. Compare pod hire from £70 a day with DIY options, and check power, plumbing, and access.
Bifold Door Security for UK Extensions: PAS 24 Alone Won’t Secure It
For UK extensions, learn how PAS 24 certification, matching test reports, and certified installation protect bifold doors, and what proof to request.
4 Phases to Make a CMP Ready for Discharge in England
Planner ready construction management plan template and checklist for England that maps to council pro formas, aligns with CDM 2015 duties, and stays...
4m, 3m and 2.3m explained for England extension ceilings
Understand how 4m/3m permitted-development limits, the 2.3m NDSS and building control headroom shape internal ceiling height for England extensions.
3 Weeks' Notice: Avoid a Drainage Consultant for SuDS on Extensions in England
England homeowners' guide to SuDS for extensions. When Approved Document H, local SPDs or sewer rules apply, and how to meet them without a separate...
Accessible extensions: 3D design to avoid retrofit and meet M4, England
Make Part M work on site for accessible rear extensions in England. 3D modelling, M4 checks and 1500mm turning circles prevent costly retrofits.
England homeowners: avoid CIL on extensions, 100 sq m, Form 9, £50
Practical CIL guide for England homeowners: check the 100 sq m test, Form 9 exemption and the under £50 rule, plus how managed build support reduces risk.
April 2026: No New Evidence Changes Appeal vs Resubmission in England
Decide whether to appeal or resubmit your England extension after the April 2026 Part 1 change. Use a six‑step checklist, plus costs, timescales and...
Section 169 Requires a Pavement Scaffolding Licence in England
Section 169 requires a pavement scaffolding licence in England. Use this practical checklist to prepare paperwork, meet 1.2m footway and insurance rules,...
70–100mm Stone Wool: Part E Acoustic Insulation for England Extensions
Practical England guide to Approved Document E: buildable acoustic assemblies, testing requirements, and managed build options.
1.7m Rule and Checklist: Side Windows Privacy Rules for England
England checklist for side windows on single storey extensions: 1.7m rule, obscurity levels, ventilation and avoiding planning conditions.
England Homeowners: Proportionate Flood Risk Assessment for Extensions
Clear, practical guidance for England homeowners on when an extension needs a flood risk assessment, how to check the Flood map for planning and keep...
Expect 4–8 Weeks: Request a Snagging List Extension in England
A step-by-step England guide to requesting a snagging list extension, including what to document, realistic 4–8 week timelines, legal rights and staged...
3m/4m and 6m/8m Limits: Extension Depth Rules for England Homeowners
Practical England guide for homeowners on extension depth: 3m/4m permitted limits, 6m/8m prior approval ceilings, measuring tips and resale risk checks.
4m & 3m Limits: Permitted Development Heights for Extensions in England
Permitted development heights in England for single storey extensions: 4m max and 3m eaves within 2m of a boundary. Practical measurement tips, checklist...
Avoid Weeks of Delay: Fuseboard Upgrades for Extensions in England
Plan fuseboard upgrades into your extension in England to secure Part P and BS 7671 sign off, avoid DNO delays and costly rework.
UK Homeowners: Avoid 80–100mm Loss When Soundproofing an Extension
Practical steps for UK homeowners to soundproof an extension. Specify airtight linings, add mass and decoupling at design stage to avoid costly retrofits...
Flood Zone Extensions: How England Homeowners Avoid Validation Delays
England homeowners: learn what an FRA must show, how to check the Flood Map for Planning, and avoid compensatory-storage and validation delays.
Avoid Six Week Delays on Extensions Near TPOs in England
Practical England advice for homeowners: how Tree Preservation Orders affect extensions, when a six week notice can pause work, and which checks and...
Article 4 extensions: 4 checks to confirm your address‑level status in England
England guide to Article 4 extensions. Learn the four address checks to confirm your status and the planning routes or a managed build option.
UK homeowners: Read plasticity and sulphate tests before extension
UK homeowners: when a soil test for an extension matters, and how lab results change foundation design, cost and timing.
UK Homeowners: RSJ for Extension, Sizes, Safety and £3,500–£9,000
UK homeowners: see typical RSJ sizes, expect £3,500–£9,000 all in costs, and follow a safety first installation and Building Control checklist to avoid...
0.18, 0.15, 1.4: Meet U-values for extensions in England
England-focused guide to Approved Document L U-values for extensions: Table 4.2 limits, practical build-ups, a worked P/A floor example, and clear...
Avoid Costly Delays: 6 JCT Clauses Homeowners in England Must Check
Homeowners in England: pick the right JCT pack, check six clauses before you sign, and consider a managed design and build alternative.
3 Reasons Your Extension Was Refused in England, and How to Fix Each
England homeowners: learn the three main reasons extensions are refused, how to read a decision, and a practical read, negotiate, revise, appeal workflow...
Get Planning Permission in Morden in 5 Practical Steps
Stepwise Morden planning advice for single storey rear extensions: permitted development, the 42 day prior approval, CIL checks, and a 5 step submission.
3 ways UK homeowners extend with no side access using design and build
UK homeowners: how to build a rear extension with no side access. Compare carry-through, crane and modular routes and why integrated design and build cuts...
15–30% Quote Surprises: Extension Quote Checklist for UK Homeowners
Use an itemised, VAT-inclusive checklist and spreadsheet method to normalise bids, spot 15–30% outliers, and get an instant, itemised quote from The...
4–5 Site Visits: Building Control Inspections for England Homeowners
England homeowners: expect 4–5 building control visits for your extension. Clear stage by stage checks, required certificates, booking tips, and how to...
3 Moves Homeowners Need to Survive Renovation: Dust, Sanity, Design
Stay home during renovation with three early moves: a written daily schedule, one refuge room, and HEPA dust control. Learn how integrated design build...
£1,800–£2,600/m² Extension Cost Breakdown for England Homeowners
2026‑validated extension cost breakdown for England homeowners: see per‑m² bands (£1,800–£2,600), a 20m² itemised budget template, contingency (10–20%),...
Reduce Planning Risk: Conservation Area Extension Rules in England
Practical guide for England homeowners: how Article 2(3), Article 4 Directions and local rules affect extensions, and how 3D visuals with managed planning...
Avoid planning delays: Kitchen diner extension ideas for UK
Practical kitchen diner extension ideas for UK homeowners: numbered concepts, glazing and clearance rules, cost ranges, permit checkpoints and a fixed...
10–20% Daylight: Rooflight Sizes for UK Homeowners With 3D Modelling
Room-led rooflight sizing for UK homeowners and builders. Use the 10–20% daylight rule, follow the supplier checklist, and test dimensions with 3D...
Check 3 Party Wall Act Extension Triggers Before You Build in England
England homeowners: a practical Party Wall Act extension checklist. Confirm the three triggers, notice timing (14 day response), and whether to use a...
10–15 Year Payback: Fabric First Extension Design in England
England homeowners: a fabric first guide to meet Part L and Part O, hit U values and airtightness targets, and secure a performance aware quote.
Get Completion Certificate: Building Regs for Extensions in England
England checklist for extension building regs: who to contact, which drawings and certificates to gather, inspection stages, and how to secure your...
Get a Fixed Price Rear Extension in England and Avoid Provisional Sums
How provisional sums work in England for single storey rear extensions, and how a fixed price or clearer contracts avoid unexpected bills.
Avoid Refusal and Delay: Prior Approval Extension in England
Step by step guide for England homeowners on single‑storey prior approval extensions: limits, the 21 day neighbour check, 42 day decision window, common...
£1,000 Measured Survey That Secures a Fixed Price Extension in England
For England homeowners: why a measured survey (from about £1,000) must come first, how it shapes budget and planning timelines, and how it turns drawings...