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House-to-flat conversions · Cardiff

House-to-flat conversions in Cardiff

Planning house-to-flat conversions in Cardiff? We design and build them for houses across South Glamorgan, and we fix the price for the agreed specification in writing before any building work starts.

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Covering Cardiff

Alongside Cardiff, we also cover Whitchurch (3 miles to the north-west), Penarth and Caerphilly.

Homes in South Glamorgan

Across Wales you find valley terraces, coastal towns, rural stone houses and newer estates, so access, slopes and local materials all feature in the design.

What do you get with a house-to-flat conversion?

A house-to-flat conversion divides a single house into two or more self-contained flats, each with its own front door, kitchen and bathroom. It always needs planning permission and full building regulations approval, particularly for fire separation and sound insulation between flats.

  • Feasibility check against local planning policy
  • Fire separation and sound insulation between flats
  • Separate electrics, heating and metering

How much should I budget for a house-to-flat conversion?

Typical ranges for house-to-flat conversions. Ground conditions, access and specification move the final figure, which we fix in writing before work starts.

Priced on survey.

Planning and building rules in Cardiff

Planning decisions in Wales are made by the local council, using permitted development rules set by the Welsh Government rather than England’s. Building regulations in Wales have their own approved documents, and the Party Wall etc. Act 1996 applies to work on shared walls and boundaries.

This needs full planning permission from your council in Wales. We prepare and submit the application and deal with the planning officer on your behalf.

What can change the price or programme?

  • Some councils restrict the loss of family houses or limit flat conversions in certain streets.
  • Each flat needs its own utilities and metering.

How does the project run?

  1. Tell us about the project. Call, use the guide price tool or send the form with a few photos and a postcode.
  2. We visit and measure. A surveyor checks the house, the boundaries and the ground, and discusses what is realistic.
  3. Drawings, approvals, written quote. We prepare the design, apply for the approvals it needs, and give you a fixed price in writing.
  4. We build it. Work follows an agreed programme, with inspections at each stage and a final sign-off.

House-to-flat conversions: common questions

How much does a flat conversion cost?

It varies too much to give a reliable guide figure, so we price each one on survey. The reduced 5% VAT rate can apply where the number of dwellings changes.

Can you help with the planning case?

Yes. We check the council’s policies first and only proceed with a design that has a realistic chance of approval.

Do you work in Cardiff?

Yes. Cardiff is within our coverage for house-to-flat conversions, along with nearby Whitchurch and Penarth.

Also covering

Learn more about house-to-flat conversions, or see every project we cover in Cardiff.

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