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Extension plans across the Wirral, from a specialist who knows the ground.

Birkenhead, Wallasey, Heswall, West Kirby and everywhere between — survey, drawings, planning and building regs, one fixed written fee from £750. Wirral Council applications handled end to end.

⚡ Get an instant estimate 📋 Book a £60 Initial Site Appraisal Meeting ⓘ Why an Initial Site Appraisal Meeting?

Wirral knowledge that saves you money.

Wirral applications go to Wirral Council — English planning rules, with a £548 householder fee. Mike covers the whole peninsula: Birkenhead, Wallasey, Bebington, Bromborough, Heswall, West Kirby, Hoylake and Prenton. Conservation areas like Port Sunlight need particular care with materials and design — exactly the judgement 25 years buys.

1 · Measured survey

Once your fee is agreed, Mike returns and measures the house himself — no juniors, no outsourcing. This is the second visit; the earlier £60 Initial Site Appraisal Meeting comes off your fee.

2 · Existing & proposed drawings

Scaled drawings of your home as it is and as it will be — the documents your planning application stands on.

3 · Planning application

Prepared, submitted and handled for you — or confirmation you don't need one under Permitted Development, which saves you the council fee entirely.

4 · Building regulation drawings

The technical pack — structure, insulation, fire safety, drainage — that building control approves and your builder prices from.

What extension plans cost.

Mike works to a fixed written fee, agreed before any work begins. Council fees are separate and paid directly — never through Mike.

ItemTypical costPaid to
Mike’s fee — single storey extension£750 – £1,400Mike (fixed, written)
Mike’s fee — two storey extension£950 – £1,800Mike (fixed, written)
Planning application (if required)£548 (Wirral Council)Your council
Planning Portal service charge£149Planning Portal
Building control (approx.)£650 – £2,000Council / inspector

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Instant Estimate

What might the design & approvals stage cost?

Mike's fee plus the council fees for planning and building control — the full professional stage, before a builder is involved. Two taps for a figure — no obligation.

Your project
Mike’s fee
£750 – £1,400
Fixed and written down before any work begins. The £60 appraisal fee comes off it.
Covers the whole design and approvals stage — survey, drawings, planning and building regs.
What’s included — and why the range?

Mike’s fee covers the complete design and approvals stage:

  • ✓ Full measured survey of your home
  • ✓ Existing & proposed drawings
  • ✓ Planning application — prepared, submitted and handled (if one is needed)
  • ✓ Full building regulation drawings your builder prices from

Why the range? Every home is different. The lower end covers a straightforward project — standard drawings, no planning application needed. The higher end covers larger or more complex work — a full planning application, more detailed drawings, or structural design to coordinate.

Before any work begins, Mike gives you a detailed written fee proposal — so you know exactly what you are paying and what it covers. The number you agree is the number you pay.

What else you may pay — and to whom
Council planning fee£548 – £585

Only if planning permission is needed. Wales charges £585 for a householder application and Cheshire West & Chester £548 — the fee is set nationally, so it does not vary between Welsh councils. Paid directly to your council, never through Mike.

Planning Portal charge£149

The service charge for submitting a planning application online. It also only applies if permission is needed, and it is charged per application submitted.

Building control£650 – £1,350

This one always applies, permission or not. It is calculated on floor area and subject to the final design — smaller projects sit toward the lower figure, larger ones toward the higher. Paid to the council's building control team or a private approved inspector, never through Mike, and he gets you an exact quote once the design is finalised.

Design and approvals only. This is what it costs to get your project drawn and approved — it does not include your builder’s costs for the actual building work.

If your project turns out to be Permitted Development, you will not need to pay the council planning fee or the Planning Portal charge, a saving of up to approximately £734. Mike checks this at the Initial Site Appraisal Meeting.

Read more about extension plans →

Already built it without approval? Regularisation →

Guide figures only. The £60 Initial Site Appraisal Meeting is not added to these figures — it comes off Mike's fee when you commission the work. Council fees correct at July 2026; building control charges vary by council and project — full details in the FAQs. Mike confirms everything in a written fee proposal before any work begins.

Or have Mike email this estimate to you — no obligation.

✅ Sent — your estimate is on its way. No obligation.

Couldn't send just now — call Mike on 07703 786 460 or email [email protected].

Book your Initial Site Appraisal Meeting.

£60, and it comes off your fee when you go ahead. Mike comes to the property to understand the scope of what you want to do and advise you accordingly — then sends a written fixed fee afterwards.

Mike rings this to arrange a time that suits you.

🔒 Mike replies as quickly as he can. Your details are never shared.

Couldn't send just now — please call Mike on 07703 786 460 or email [email protected].

You don't have to take that number on trust.

Every planning application Deeside Architectural Design submits goes onto the council's public register — under the practice name, with the decision attached, permanently. It's free to search and it isn't curated by us. What the register cannot show you is the other half of the work: the projects that qualified as Permitted Development, needed no application at all, and saved the client the council fee. Those leave no public trace. So the number below is the part you can check — not the whole of it. Before you decide whether the fee above is worth paying, go and read it.

165 applications

Submitted to Flintshire County Council under Deeside Architectural Design since 2010 — every one searchable, with its decision attached.

Plus the invisible ones

Many projects qualify as Permitted Development, need no application, and never reach the register. The 165 is the work that required permission — not the count of jobs done.

Since 2010

Deeside Architectural Design Limited, incorporated January 2010, and 25 years of drawings behind it. Companies House no. 07128221.

Check it yourself

Open Flintshire's planning register, put Deeside Architectural in the Agent field, and read every decision — including the ones that didn't go our way.

Search Flintshire's planning register →

Figures taken from Flintshire County Council's public planning register, August 2026.

Questions people ask.

Do you really cover the Wirral — or just North Wales?

Yes, genuinely — Mike works across the water on the peninsula regularly, from Birkenhead and Wallasey to Heswall, West Kirby, Hoylake and Bromborough.

Is planning different on the Wirral than in Wales?

Yes — England and Wales have different Permitted Development rules and different fees (£548 for Wirral Council vs £585 in Wales). The estimator on this page is already set to Wirral so your numbers are right first time.

My Wirral house is in a conservation area — is an extension possible?

Usually yes, with the right design — the Wirral has several conservation areas, including Port Sunlight — conservation status restricts Permitted Development and raises the bar on materials and detailing, it doesn't ban extensions. Mike will tell you honestly at the Initial Site Appraisal Meeting what the conservation officer is likely to accept.

Start with a number, not a commitment.

Two taps on the estimator gives you a realistic figure. When you're ready, the £60 Initial Site Appraisal Meeting comes off your fee if you go ahead.

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