KJP Architecture

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Architectural Practice based in Heswall, Wirral, with over 30 years’ experience, specialising in residential extensions, alterations and refurbishments - happy to offer general advice to anyone considering extending their home or unsure where to start. • Designing new homes - altering & refurbishing existing homes
• Extensions and Loft conversions
• Planning applications
• Building Regulation submissions
• Structural calculations
• Measured surveys
• SAP & Heat Loss calculations

Replacing the Old with Something Far More UsefulThis project involves the demolition of an existing damaged garage and i...
26/08/2026

Replacing the Old with Something Far More Useful

This project involves the demolition of an existing damaged garage and its replacement with a purpose-designed extension that makes much better use of the space.

The new accommodation will provide:
• Utility Room – keeping laundry and everyday household jobs away from the main living areas.
• Shower Room – adding a practical additional facility to the home.
• Larder – dedicated storage conveniently located for the kitchen.
• Store – useful space for all those things that need a home.

Rather than simply rebuilding the garage, the new layout turns the footprint into practical, usable accommodation tailored to the needs of the property.

Sometimes a relatively straightforward alteration can make a big difference to how a home works day to day.

Thinking about replacing an old garage or making better use of an underused part of your home? If you’re thinking about any project and want to talk it through, we’d love to hear from you — the Initial Consultation is free, and there’s no pressure to commit.

Call us on 0151 342 2779 or text / Whats App us on 07515 485056 to book your free consultation.



Don’t you just do extensions?We get asked this more often than you might think.No — extensions are only part of what we ...
24/08/2026

Don’t you just do extensions?

We get asked this more often than you might think.

No — extensions are only part of what we do.

At KJP Architecture, our projects range from small alterations through to complete property transformations and new-build developments.

Our work includes:

Other types of work

• New-build houses and bungalows
• Replacement dwellings
• Small residential developments
• Self-build and custom-build homes
• Loft conversions
• Garage and outbuilding conversions
• Barn/farmhouse projects
• Flats and residential conversions
• Commercial-to-residential conversions
• Commercial buildings and alterations
• Showrooms and office projects
• Guest houses and hospitality projects
• Sports and community buildings
• Conservation Area projects
• Works to Listed Buildings
• Accessible adaptations
• Complete property refurbishments
• Structural alterations and major knock-throughs
• Roof alterations and roof raises
• Contemporary remodelling of older properties
• External alterations and façade improvements
• Porches, sunrooms and garden rooms

And the services behind them

• Feasibility and initial design advice
• Measured building surveys
• Existing and proposed drawings
• Planning drawings
• Householder and Full Planning Applications
• Permitted Development advice
• Lawful Development Certificates
• Prior Approval applications
• Pre-Application enquiries
• Permission in Principle
• Planning Statements
• Design & Access Statements
• Planning condition discharge
• Building Regulations drawings
• Detailed construction drawings
• Building Control/RBCA submissions
• Structural design coordination and calculations
• Drainage and soakaway detailing
• SuDS information
• Biodiversity/BNG considerations and exemption statements
• Part L energy-efficiency detailing
• Part O overheating considerations
• Part R digital infrastructure/connectivity plans
• Water-efficiency specifications
• Fire safety and means-of-escape detailing
• Acoustic construction details
• Accessibility and Part M detailing
• Construction specifications and drawing notes
• Designer's Risk Assessments/CDM information

And yes… we do extensions too!

Whether you are adding a little more space, completely transforming an existing property or starting with a blank site, we can take the project from the initial ideas through Planning and Building Regulations to construction drawings.

Thinking about a project? Get in touch for an initial chat.

KJP Architecture - More than just extensions.

KJP Architecture - Explainer Series 3So, you have decided you do want an extension — and you are clear on what you are t...
24/08/2026

KJP Architecture - Explainer Series 3

So, you have decided you do want an extension — and you are clear on what you are trying to achieve.

The next step is understanding what type of planning approval is required and which route is right for your project.

What do you need for a house extension?
Many homeowners assume extensions always require Planning Permission.
Sometimes that is correct — but many fall under Permitted Development.

What is Permitted Development?
Permitted Development (PD) is a set of rights granted by the UK Government that allow certain works to be conducted without applying for full planning permission.

Think of it as a fast-track route — fewer delays, less red tape — if you meet the rules.

•Permitted Development Rights (PDR)
Some extensions and loft conversions can proceed without planning permission, but only if they meet strict limits on:
Size and projection
Height and eaves level
Distance to boundaries
Materials
Percentage of garden built over

If just one of these limits is exceeded, planning permission is usually required.

There is detailed technical guidance available from the Government, but interpretation is key — small measurement differences can change everything.

Where an extension complies with PDR, we always recommend applying for a Certificate of Lawful Development.

This provides written confirmation that the works are lawful — invaluable for future sales, remortgages, and general peace of mind.

Certificate applications typically take around 6 weeks.

• When PDR Do Not Apply

Permitted Development Rights can be restricted or removed if:

The property is in a Conservation Area
The building is listed
It is a flat or maisonette
Previous extensions have already used up allowances
An Article 4 Direction or planning condition applies

In some cases, the Prior Approval route may still be available.
Understanding which route applies at the outset can save time, cost, and frustration later.
If you are unsure, that is exactly what we are here for.

KJP Architecture - Explainer Series 2• Natural light mattersLight can make or break an extension - Consider:Orientation ...
19/08/2026

KJP Architecture - Explainer Series 2

• Natural light matters
Light can make or break an extension - Consider:
Orientation (sun path)
Window & door positions
Rooflights or lanterns
How light reaches existing rooms

Good daylight design makes spaces feel bigger, brighter, and more usable.

• Budget (and contingency)
As a rough guide, many extensions are around:
£2,000–£3,000+ per m² (build cost only)

Also allow for:
Professional fees
Planning & Building Regulations
Services & finishes
A sensible contingency

Unexpected issues often arise once work starts — planning for them reduces stress later.

• Learn from neighbours
If nearby properties have already extended, call round and ask how their project went.

Ask about foundations
Any Drainage issues
What were the ground conditions like
Any problems obtaining materials
Who was their builder and would they recommend them

Local knowledge can be invaluable early on.

• Impact on neighbours
Key considerations:

Loss of light
Overshadowing
Overlooking & privacy
Scale and massing
Proximity to boundaries

These matter for planning applications and permitted development.

A simple rule of thumb, ask yourself:

Would you be happy if your neighbour built the same extension next door?

If the answer is no — it’s worth revisiting the design early.

If you’re at the

“where do I even start?” stage — we’re happy to help.

DM for an initial chat.

KJP Architecture - Explainer Series 1Thinking of extending your home?A few key things to consider before you start.• Sta...
12/08/2026

KJP Architecture - Explainer Series 1

Thinking of extending your home?

A few key things to consider before you start.

• Start with the right question

Before designs, window colours, or speaking to builders…take a step back first.

The most successful extensions start with clear thinking, not drawings.

• What problem are you solving?

Is it:

Lack of space?
Poor layout or flow?
Not enough natural light?
The way the house works day to day?

A good extension should fix a problem, not just add square metres.

• Do you really need an extension?

Could your requirements be met by:

De-cluttering and getting rid of junk?
Reworking the existing layout?
Opening up spaces internally?
Improving light and connections?

Sometimes the best solution isn’t bigger — just better planned.

• How will you use the space?

Think about everyday life:
How do you move through the space?
Where does furniture sit?
Do you need storage or flexibility?

💡 A home office today might become a snug or playroom in the future

If you’re at the
“where do I even start?” stage — we’re happy to help.

DM for an initial chat.

Address

62a Pensby Road
Heswall
CH607RE

Opening Hours

Monday 9am - 5pm
Tuesday 9am - 5pm
Wednesday 9am - 5pm
Thursday 9am - 5pm
Friday 9am - 5pm

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