Do I need structural calculations?

If you are removing or altering a load-bearing wall, yes. A structural engineer must design the replacement support — typically a steel beam (RSJ) with padstones. We handle this as part of the package.

Do I need building control for removing an internal wall?

Yes. Any structural alteration requires a building control application. The inspector will check the steelwork before it is covered up. We manage the full process from application to sign-off.

Can you install the steel as well?

Yes. We provide the full package — survey, plans, engineering, building control and installation. You do not need to find a separate contractor.

Can you help with kitchen knock-throughs?

Absolutely. Kitchen-to-dining and kitchen-to-living knock-throughs are our most common job. We assess the wall, design the opening, install the steel and make good.

What happens at the survey?

We measure the rooms either side of the wall, check the wall construction, look at what is above and confirm whether the wall is load-bearing. The visit takes around 30 to 45 minutes.

How quickly can you provide plans and calculations?

Floor plans are typically delivered within 5 working days of the survey. Structural calculations follow within 5 working days after that. If you need it faster, ask about our priority service.

Structural alterations · Poole, Dorset

Knock-Throughs, RSJs & Internal Structural Alterations

Name: PlanBuildCo
Address: Poole, Poole, Dorset, BH15, GB
Telephone: 0800 056 7069
Price range: ££

We can usually visit this week.

Call us now. We can usually visit this week, have your plans within days, and be ready to start the job before the end of the month.

Call Now — 0800 056 7069 Send Your Details

✓ Booking surveys this week · Fixed prices · No lock-in

Knock-throughsRSJ / steelsOpen-plan kitchensInternal alterationsBuilding control

Trusted by Poole homeowners since 2017 · 0800 056 7069

We can usually visit this week

One team from call to install

Structural calculations handled

Building control support included

Local company in Poole

What we do

Internal structural alterations

We handle the full process for internal wall removals, steel beam installations and structural layout changes.

Exposed brickwork during internal wall knock-through

Knock-throughs

Remove internal walls to open up your ground floor. We survey, design, calculate and install.

Steel I-beam installed in structural opening

RSJ / steel beam installation

Correctly sized steel beams with padstones, installed to structural engineer specifications.

Open-plan kitchen flowing into living area after wall removal

Open-plan kitchen alterations

Kitchen-to-dining or kitchen-to-living knock-throughs with full structural support.

Room being remodelled during internal layout change

Internal structural layout changes

Reconfigure your internal layout. Load-bearing wall assessments, new openings, repositioned doorways.

Structural calculation drawings showing beam specifications

Structural calculations & drawings

Beam sizing, padstone details, lintel schedules and full structural engineering drawings.

Building control inspector with clipboard and hard hat

Building control support

We handle the building control application and manage inspections through to sign-off.

How it works

From phone call to finished job

Six steps. One team. Often done within a month.

Homeowner on phone discussing their project

Call us

Tell us what you want to do. We confirm fit and can usually book a visit this week.

Surveyor measuring a wall with tape measure on site

Site visit or remote review

We visit to measure up and assess the structure — or review your existing plans remotely.

Team reviewing floor plans and blueprints on site

Floor plans and layout options

We draw up existing and proposed layouts showing the new openings. Typically within 5 working days.

Structural engineering calculations and technical drawings

Engineering and calculations

Structural engineer sizes the steel, produces calculations and construction drawings.

Inspector reviewing construction work with clipboard

Building control

We submit the building control application and manage inspections.

Construction workers installing structural steelwork

Install and completion

We install the steelwork, make good and hand over. Idea to install — often within a month.

Project proof

Before and after

Real structural alterations completed by PlanBuild.

Before

After

Kitchen knock-through

Removed load-bearing wall between kitchen and dining room, installed RSJ and created open-plan family space.

Knock-throughPoole

Before

After

Double reception room opening

Opened up two reception rooms into one large living space with concealed steel beam above.

RSJ installationBournemouth

Before

After

Ground floor reconfiguration

Removed two internal walls, installed two steels and reconfigured the entire ground floor layout.

Internal layout changeChristchurch

Free estimate

How much does a structural knock-through cost?

Get an instant idea of costs before you commit to anything. No salesman will call — just the numbers.

1. What type of wall is it?

2. What type of property?

3. Your postcode area

Prefer to send details?

Tell us about your project

We will call you back — usually the same day.