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West London builders for extensions, lofts and full renovations

Founded by Lukasz Zielinski in North Kensington. Kitchens, bathrooms, joinery and whole-house renovations across West and Central London.

“I cannot recommend Lukasz and the team at W10 Builders highly enough.”
— loft conversion and full renovation
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Shaker kitchen with brick-slip splashback and under-cabinet lighting

How it works

  1. Free site visit

    Lukasz comes round, looks at the space and listens to what you want.

  2. A clear quote

    A written price for the work, so you know what you're paying for before anything starts.

  3. The build

    One team, one point of contact, and regular updates on progress.

  4. Handover

    A clean, finished home and a final walk-round together.

What we build

All services
Velux roof windows on kerbs on a new flat roof deckHome extensionsRear, side-return and wraparound extensions that open up the ground floor and bring the garden in.Dormer framing around a new steel beam in a loftLoft conversionsDormer, mansard and hip-to-gable loft conversions that add a bedroom, bathroom or home office.Restored period hallway with arches, stone flags and a sweeping stairFull renovationsWhole-house refurbishments of period and modern homes, managed as one project with one schedule.Shaker kitchen with a brick-slip splashback and under-cabinet lighting, HammersmithKitchensKitchens planned around how you cook and live, from layout and electrics to worktops and lighting.Book-matched marble vanity wall with a floating basin unitBathroomsFamily bathrooms, en-suites, shower rooms and cloakrooms, built on proper waterproofing and finished with careful tiling.Cladding a winder staircase in walnutBespoke joinery & staircasesFitted wardrobes, media walls, panelling and staircase makeovers, made to measure and finished on site.

Recent work

More of our work
Restored period hallway: arches, stone flags, sweeping stair
Restored period hallway: arches, stone flags, sweeping stair
Book-matched marble vanity wall with floating basin unit
Book-matched marble vanity wall with floating basin unit
Oak herringbone floor in a bay-window living room
Oak herringbone floor in a bay-window living room
Cladding a winder stair in walnut
Cladding a winder stair in walnut
Walnut panelling with a floating bench
Walnut panelling with a floating bench
Modern kitchen with peninsula and pendant lights
Modern kitchen with peninsula and pendant lights

What clients say

All 28 reviews on Checkatrade
“I cannot recommend Lukasz and the team at W10 Builders highly enough. They carried out a loft conversion and full renovation of my home… The quality of workmanship is exceptional, with every detail finished to the highest standard.”
Loft conversion and full renovation
“Very high standard of workmanship, and no corners cut! … I'm thoroughly satisfied with the job and the price which they are stuck to exactly”
Client review, our website
“Lukas and his team were extremely courteous, professional and honest. … From the first day I was always informed of the plan, progress and obstacles which came up unexpectedly…”
Client review, our website

Planning an extension or loft?

Send a few details, or call or WhatsApp Lukasz on [PHONE].