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It didn't start with a business plan, but with a seventeen-year-old boy on a building site because there was nothing he'd rather be doing. Thirty-eight years later, that same man still shows up on site every day — only now not as an apprentice, but as the man who has been passing the trade on through his own company for twenty-five years. Extensions, renovations: it has become a specialism he's willing to put his name to.

His son grew up among sawhorses and building drawings, and chose — not by accident — the same path. Twenty years of experience in construction, the same carpentry training as his father, but topped off with a degree in construction engineering. That combination is exactly what he brings: the hands-on craft from home, complemented with technical knowledge of structures, materials and regulations that sharpens the way of working.

“Not two separate companies that happen to work together — one team with two generations of insight.”

Today they work together under one roof, under the name RJ Bouwgroep: a merger of Rola Timmerwerken, the name father established twenty-five years ago, and JL Allround, through which son added his own contribution. Not two separate companies that happen to work together, but one team with two generations of insight — on every building site, in every conversation at the kitchen table, in every quote that goes out the door.

What does that mean in practice? That every project always has two pairs of experienced eyes on it. That traditional craftsmanship and up-to-date construction knowledge don't exist side by side, but go hand in hand. And that whether it's a bathroom or a complete new-build home, you're talking to people who don't just know the trade — they've been doing it their whole lives.

The team

Meet father & son

Photo coming soon
Co-founder · RJ Bouwgroep

Ronald Lasaroms

38 years of construction experience · 25 years running his own company

Started on the building site at seventeen and founded his own company twenty-five years ago, specialising in extensions and full renovations. Still on site every day.

  • Carpentry Diploma (Timmerman 1)
  • 25 years as an independent business owner
  • Specialist in extensions
Photo coming soon
Co-founder · RJ Bouwgroep

Joey Lasaroms

20 years of construction experience

Grew up within the family business and built up twenty years of hands-on experience, complemented by a degree in construction engineering. Combines technical and structural knowledge with craftsmanship learned at home.

  • Carpentry Diploma (Timmerman 1)
  • Construction Engineering training
  • 20 years of hands-on experience in extensions & renovations
Our history

Almost sixty years of construction experience, together on one site

38 years ago

Father starts as an apprentice on a building site — the beginning of a lifelong passion for the trade.

25 years ago

Rola Timmerwerken is founded, specialising in extensions and renovations.

20 years ago

Son takes his first steps in construction, with the same training as his father as a foundation.

Today

RJ Bouwgroep: two generations, one team, under one roof.

What we stand for

Craftsmanship from father to son

Traditional craftsmanship

Artisan knowledge that's been in the family for almost sixty years.

A personal approach

As a family business, our name is on every project — you can feel that in the attention we give.

Two pairs of eyes

Father and son both review every project — more experience, less risk of mistakes.

Quality

Carefully chosen materials and an eye for every detail — we never work faster than quality allows.

Reliability

An agreement is an agreement. We keep our promises, with no surprises afterwards.

Customer focus

Your wishes come first — even when honest advice means it's not the most expensive solution.

Efficiency

Clear planning and short lines of communication, so work is finished on time and within budget.

Our work

A look at the building site

A selection of our specialisms — photos of our own projects coming soon.

Feel like getting in touch?

Request a no-obligation quote, or send us a message directly via WhatsApp.

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