Extension Design Insights & Guides
Expert advice on home extensions, planning permission, building regulations, and extension design packages for Hampshire homes.
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Planning Permission Refused for Your Extension? Your Options in 2026
Extension or loft planning refused? Compare resubmitting, appealing within 12 weeks, or a permitted development route — with 2026 fees for England.
Does the Future Homes Standard Apply to My Extension or Loft Conversion? (2026 Guide)
Does the Future Homes Standard affect your extension, loft or garage conversion? What the 2026 rules mean for existing homes, and what still applies.
Dormer vs hip-to-gable loft conversion: which suits your home?
Compare dormer and hip-to-gable loft conversions by roof shape, usable space, daylight, planning and design trade-offs.
Is my loft suitable for a conversion? Head height, structure and planning checks
A practical first assessment of loft headroom, roof structure, stairs, daylight, planning constraints and Building Regulations.
Loft conversion design and planning in Hampshire and Berkshire
How to plan a loft conversion in Hampshire or Berkshire, from roof type and local planning checks to coordinated design and approvals.
Lawful Development Certificate: Do You Need One for a Permitted Development Extension? (2026 Guide)
Many extensions, loft conversions and garage conversions can be built under permitted development, with no planning application.
How Much Does a House Extension Cost in St Albans & Hertfordshire? (2026 Guide)
"How much will it cost?" is the first question almost every homeowner asks.
Extension Feasibility Study: What to Check Before You Apply for Planning Permission (2026 Guide)
Most of the problems that cost homeowners money on an extension could have been spotted before a single drawing was produced.
What the 2026 Planning Reforms Mean for Your Home Extension
A wave of government planning reforms is reshaping what's possible for homeowners across Hampshire, Surrey, Hertfordshire, Berkshire, Wiltshire, Oxfordshire and Buckinghamshire. If you've been thinking about extending, 2026 could be the most important year to act.
Air Conditioning Planning Permission UK: Hampshire Homeowner Guide (2026)
Does fitting an external AC unit need planning permission? Check current permitted development criteria, including the rule changes introduced in May 2025.
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Garage Conversion Planning in Hampshire: Do You Need Permission?
Most Hampshire garage conversions don't need planning permission — but there are important exceptions. Here's what to check before you start your project.
Extension Costs in Winchester 2026: A Realistic Budget Guide
How much does a house extension really cost in Winchester? We break down real build costs by type, the design fees, planning fees and what affects total project cost.
House Extensions in Southampton: A Local Guide for 2026
Everything Southampton homeowners need to know before extending — from Victorian terrace challenges to Southampton City Council's planning rules and build costs in 2026.
Planning Permission for Extensions: What Hampshire Councils Look For in 2026
Every local planning authority in Hampshire has its own design preferences and red lines. Understanding what Winchester, Basingstoke, Test Valley and the rest actually want to see on a planning application can be the difference between approval and refusal.
What Is a Building Regulations Drawing Package — and Do You Need One?
Most homeowners know they need planning permission before building an extension. Building Regulations are a separate requirement, and the drawings and calculations needed depend on the project and submission route.
Side Return Extension vs Rear Extension: Which Is Right for Your Home?
Choosing between a side return extension and a rear extension isn't just a matter of space — it depends on your property type, planning situation, budget and the result you want to achieve. Here's how to make the right call.
How Much Does a Loft Conversion Cost in Hampshire? (2026 Prices & Guide)
Loft conversions remain one of the most cost-effective ways to add space in Hampshire. But costs vary significantly depending on conversion type, size and finish. Here's what you can expect to pay in 2026 — and what drives the price.
How Long Does a Garage Conversion Take? Complete Timeline & Stages
See the stages in a garage conversion, from feasibility and drawings to approvals and construction, with no promise of a fixed overall timescale.
Hampshire Build Premium Package: Design and Contractor Tender Support
The Premium Package at £2,950 + VAT adds defined contractor tender support to the design package, including a schedule of works, two cost proposals and a client-focused building contract issued for signature.
Why Choosing a Vetted Contractor is the Most Important Decision You'll Make on Your Extension
The number one thing that goes wrong on extension projects isn't the design — it's the contractor. Here's what vetting actually means, what your building contract should include, and why Hampshire Build built a vetted panel.
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House Extensions Hampshire: Complete Guide 2026
Everything Hampshire homeowners need to know about extending their home in 2026 — planning permission, costs, timelines, types of extension, and how to choose the right designer.
Choosing an Extension Designer for Your Hampshire Home
Compare extension design experience, insurance and the written scope before choosing a provider for your Hampshire home.
Hampshire Build Now Serving West Sussex and Berkshire: New Service Areas for 2026
Following strong demand from homeowners outside Hampshire, we're pleased to confirm that Hampshire Build now formally covers West Sussex and Berkshire — bringing our fixed-fee extension design packages to even more families across the South East.
How to Pass Building Regulations First Time: Hampshire Extension Checklist 2026
Building regulations approval is a legal requirement for almost all home extensions — but many homeowners don't fully understand what's involved until they're already on site. This practical checklist sets out what inspectors look for and how to avoid the most common failures.
Flat Roof vs Pitched Roof Extension: Which is Right for Your Hampshire Home?
Choosing between a flat roof and a pitched roof for your extension isn't just an aesthetic decision — it affects planning permission, build cost, maintenance, and how much natural light you can bring in. Here's everything you need to know.
Garage Conversions in Hampshire 2026: Planning, Design & Cost Guide
Converting an integral or attached garage is one of the most cost-effective ways to add a room to your Hampshire home. With no extension to build and planning permission rarely required, garage conversions offer exceptional value — but the details matter.
Crittall Style Doors: The Ultimate Guide for Your Home Extension
Crittall style doors have become one of the most sought-after features in modern home extensions. Discover why these iconic steel-framed glazing systems add both character and value to your property.
Permitted Development or Planning Permission: Which Route is Right for Your Extension?
Understanding the key differences between Permitted Development rights and full Planning Permission can save you time, money and frustration. Here's what every homeowner needs to know before starting their extension project.
Hampshire Build Expands into Hertfordshire for 2026
We're excited to announce our expansion into Hertfordshire, bringing our extension design services to St Albans, Watford, Stevenage and towns across the county.
New Year, New Space: Start Your 2026 Home Extension Journey in Hampshire
Make 2026 the year you finally create the home you've always dreamed of. Discover why January is the perfect time to start planning your Hampshire extension project.
Meet Hampshire Build at the Homebuilding & Renovating Show 2026
We're excited to announce that Hampshire Build will be exhibiting at the Homebuilding & Renovating Show. Come and meet our team to discuss your extension project in person.
Modern Extension Design Trends Transforming Hampshire Homes in 2026
Discover the latest extension design trends for 2026. From contemporary glazing to sustainable materials, see how Hampshire homeowners are creating stunning living spaces.
Extension Design Cost Hampshire: Pricing Guide (2026)
Understand what extension design fees can include and how to compare written scopes, service levels and project-specific quotes across Hampshire.
Single-Storey Extensions Hampshire: Complete 2026 Design Guide
Explore single-storey extension layouts, planning considerations and budgeting factors for Hampshire homes, with a free feasibility check for your project.
How to Choose an Extension Designer in Winchester & Hampshire (2026)
Complete guide to choosing the right extension designer for your Winchester, Basingstoke, or Southampton home extension. Compare qualifications, experience, pricing models, and what to look for in Hampshire extension design services.
Kitchen Extension Design Ideas for Hampshire Homes (2026)
Explore kitchen extension layouts for Hampshire homes, from side returns to glazed rear additions, and use a free feasibility check to test your project.
Building Regulations for Hampshire Extensions (2026)
Understand building regulations for Hampshire extensions, from drawings and structural information to energy, fire safety and drainage checks before work starts.
Permitted Development Rights: Extending Without Planning in Hampshire (2026)
Check permitted development rights for Hampshire extensions, including size limits, exceptions and when a certificate or planning application may be needed.
House Extension Cost Hampshire 2026: Budget Guide
A practical 2026 guide to Hampshire house extension costs, the factors that shape a project budget and what to include beyond the builder's price.
Hampshire Extension Designer Packages: Pre-Build Package vs Premium Package vs Premium Plus Package (2026 Guide)
Compare Hampshire Build's three fixed-fee extension design packages — Pre-Build (£1,950 + VAT), Premium (£2,950 + VAT) and Premium Plus (£3,950 + VAT) + VAT. Find the right option for your project.
Comparing Fixed-Fee and Hourly Extension Design in Hampshire
Compare extension design fee structures by checking the defined scope, exclusions and package deliverables.
Pre-Build Package £1,950+VAT: Complete Guide for Hampshire Extensions
A guide to Hampshire Build's Pre-Build fixed-fee package: planning drawings, Building Notice-ready building regulation drawings, and structural calculations by an independent qualified structural engineer.
Kitchen Extension Cost Hampshire: Budget Guide (2026)
Explore the main factors affecting kitchen extension costs in Hampshire, including size, specification and fit-out, and use our free calculator for an initial estimate.
Two-Storey Extension Cost (2026): Prices per m² and Worked Examples
Compare indicative 2026 two-storey extension build costs, total floor area, VAT and separate project allowances before obtaining contractor quotations.
Home Extensions in St Albans: Navigating Conservation Areas, Planning & Design
St Albans has 28 conservation areas and strict planning requirements. Our complete guide helps homeowners understand what's possible, what it costs, and how to get planning approval for your extension project.
Extension Cost Calculator UK 2026: Single and Two-Storey Budgets
Work out an indicative extension budget by size and type, then check the cost and planning context for your address.
Hampshire Build's 95% Planning Approval Rate
Our architectural design approach, 95% planning approval rate and 20+ years of experience, with an address-specific planning check before committing.
Open-Plan Kitchen Extension Ideas for Hampshire Homes
Consider practical kitchen, dining and living zones, daylight, storage and structural openings before choosing an open-plan extension layout.
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