How much does it cost to knock through a wall?

Removing a non-load-bearing wall costs £500–£1,500. Removing a load-bearing wall costs £2,500–£6,000 including the steel beam. Making good (plastering, flooring, decoration) adds £2,000–£5,000. Total for a typical open-plan conversion: £5,000–£12,000.

How do I know if a wall is load-bearing?

As a general rule, walls that run perpendicular to the floor joists above are likely load-bearing. Walls parallel to the joists are more likely to be non-load-bearing. However, this is not always the case — a structural engineer should confirm before any wall is removed.

Can I create open-plan living without an extension?

Yes. Many homes have enough ground-floor space — it is just divided by walls. Our Vision Draft (£29.99) shows what your home could look like with walls removed, before you spend anything on structural work.

Open-Plan Living Guide: Wall Removal, Costs & Design in Dorchester

Q: Do I need planning permission to remove an internal wall?

No. Internal alterations do not require planning permission. If the wall is load-bearing, you need Building Regulations approval for the structural work, but this is a separate process from planning.

Q: Do I need planning permission for a open-plan living guide: wall removal, costs & design in Dorchester?

It depends on your specific property. Dorset Council covers a large rural area with many villages in conservation areas and AONBs (Dorset AONB, Cranborne Chase AONB). Permitted Development rights may be restricted in these areas — always check before assuming PD applies. Dorset Council approves approximately ~87% of householder applications. We assess your project and property designations before recommending the planning route — many Dorchester homeowners find they only need a Certificate of Lawfulness (£1,500).

Open-plan living does not always require an extension. Removing internal walls to connect kitchen, dining, and living areas can transform your home for a fraction of the cost. Here is what Dorchester homeowners — covered by Dorset Council — need to know about costs, planning, and timelines.

Open-Plan Living Guide: Wall Removal, Costs & Design rules in Dorchester

Dorchester falls under Dorset Council (Dorset Council). Dorset Council covers a large rural area with many villages in conservation areas and AONBs (Dorset AONB, Cranborne Chase AONB). Permitted Development rights may be restricted in these areas — always check before assuming PD applies.

Planning applications (annual)

~6,000

Average decision time

8–10 weeks

Approval rate

~87%

AONB coverage

Extensive

Fixed prices, no surprises

Local team in Poole

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Based in Poole since 2017

What you need to know

Do you need an extension?

If your house has separate kitchen, dining room, and living room on the ground floor, you may have enough space already — it is just divided by walls. Removing one or two internal walls can create the open-plan feel without the cost and disruption of an extension. Our Vision Draft (£29.99) shows you what is possible before you commit.

Load-bearing vs non-load-bearing walls

The critical question is whether the wall you want to remove is load-bearing (supporting the structure above). Removing a load-bearing wall requires a steel beam (RSJ) to transfer the load. A structural engineer determines the beam size. Non-load-bearing walls (stud walls) can usually be removed without structural intervention.

The 'broken plan' alternative

Fully open-plan is not for everyone. Cooking smells, noise, and mess are visible from every corner. 'Broken plan' uses partial walls, glazed screens, or level changes to create zones that feel connected but can be separated. It is increasingly popular with families.

How much does it cost in Dorchester?

Item	Typical Cost Range
Non-load-bearing wall removal	£500–£1,500
Load-bearing wall removal (inc. RSJ)	£2,500–£6,000
Structural calculations	£350
Building control fees	£300–£500
Making good (plastering, flooring)	£2,000–£5,000
Total (wall removal + making good)	£5,000–£12,000

Prices based on Dorset rates, 2026.

Planning permission in Dorchester

Internal wall removal does not require planning permission. It is an internal alteration. However, if the wall is load-bearing, you need Building Regulations approval for the structural work.

Internal alterations are not controlled by Permitted Development — they fall outside the scope of planning entirely. No application of any kind is needed for internal changes, though Building Regulations still apply for structural work.

Dorset Council — local planning context

Dorset Council covers a large rural area with many villages in conservation areas and AONBs (Dorset AONB, Cranborne Chase AONB). Permitted Development rights may be restricted in these areas — always check before assuming PD applies.

Dorset Council processes approximately ~6,000 planning applications per year, with an approval rate of ~87%. Average decision time is 8–10 weeks.

Building regulations

If removing a load-bearing wall, Building Regulations approval is required for the structural beam installation. This includes structural calculations, correct padstone details, and sign-off by building control. Non-load-bearing wall removal does not trigger Building Regs.