One house, several homes.

Converting London houses into self-contained flats — planned, designed and approved for the strongest rental or resale return.

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London Victorian house suitable for conversion into self-contained flats

Flat conversions

The return is decided at the drawing board.

How many flats, what size, and how they are laid out determines both the planning outcome and the end value. We model the options against local policy, space standards and the market, so the scheme you submit is the scheme worth building.

Feasibility & options

Unit mix, space standards, planning risk and likely end values, set out in writing.

Planning

Full application with plans, design statement and the supporting documents your borough expects.

Technical design

Building regulations drawings covering sound, fire, structure and services for sign-off.

A finished Simplicity Designs project in London

“A good conversion adds homes without losing the character that made the building worth keeping.”
Hakki HassanFounder & Principal Designer

Do I need planning permission to convert a house into flats?

Yes — converting a single dwelling into two or more self-contained flats always requires full planning permission. Councils assess the unit sizes against national space standards, the quality of each flat's outlook and amenity, refuse and cycle storage, and the impact on local parking and character.

How many flats can my house become?

That depends on floor area, ceiling heights and layout. As a guide, a typical London Victorian terrace of 150–200m² often supports two or three good flats; forcing in a fourth usually fails on space standards or amenity. We test the options and show you the value of each before you choose.

What building regulations apply?

Conversions trigger requirements for sound insulation between flats, fire separation and escape routes, thermal upgrades, ventilation and structure. Our in-house structural engineers design any new openings and floor strengthening as part of the same package.

Conversion or HMO?

Self-contained flats generally achieve higher sale and rental values but need full planning and higher build cost; HMOs can be quicker where policy allows. We advise on both routes for your specific address.

Compare with HMO conversion →