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We undertake all home improvement needs

Book a free quotation and receive our expert advice.

RGB Construction have grown a respectable reputation for being reliable, transparent and competitively priced local builders.

The majority of the building work that we do is through recommendations from happy clients that we work with time and time again.

We work closely with our clients to ensure we successfully turn ideas into reality, with an emphasis on quality and efficiency.

With over 30 years of building and construction experience, you can be sure your property is in the safest of hands.

We are expert builders

covering Cardiff & South Wales

We understand the importance of receiving the highest quality building and construction work, so if you're looking to take your home to the next level we are keen to discuss your requirements.

Choose a company who offer peace of mind and expert advice throughout the entire building process.

Wooden Home Framing

Rise of Timber Frame Extensions

Discover why timber frame is growing in popularity among homeowners seeking extra property space at an affordable price.

Damage to property

Home Repair Insurance Claims

Learn about reinstating your home to its former glory following a home insurance claim with our range of home improvement services.

FMB - Federation of Master Builders Logo

We are proud members of the Federation of Master Builders, and our team of craftsmen have over 30 years of industry experience between them.

We have a wealth of experience when it comes to undertaking home improvement projects to properties within Cardiff and South Wales. From conversions, extensions and landscaping to kitchen/bathroom installation, we cover it all.


A home conversion will allow you to convert an existing room into a beneficial space for you and your family. Our expertise in the industry will ensure your conversion project meets your every need, with bespoke design and planning, specialist modifications, and results that meet the highest standards.

We undertake:

  • Loft Conversions

  • Garage Conversions

  • Basement Conversions

Loft conversion at a property in Cardiff


When it comes to increasing the size of your property there are a range of single-storey or multiple-storey extension options that may be available to you. For growing families and property developers alike, a home extension is always a popular choice.

Home extensions are typically utilised as an additional:

  • Kitchen Diner

  • Entertainment Room

  • Granny Annex

  • Bedroom, Bathroom or Lounge

  • Conservatory

A rear house extension on a property in Cardiff, South Wales

Garden Rooms

A garden room offers the opportunity to transform outdoor space into a valuable addition for you and your family. Our industry expertise guarantees that your garden room project aligns with your specific requirements, featuring custom design, meticulous planning, specialised enhancements, and results that adhere to the highest quality standards.

A garden room can offer:

  • Versatile Spaces

  • Blending Outdoors with Indoors

  • Added Value

Garden room at a property in Cardiff


Transform your garden and outdoor grounds into a space that you can admire and be proud of. Our team of craftsmen can create a quality design for your outdoor space that meets your budget, needs and taste. From paving, driveways and patios, we cover it all. 

  • Paving 

  • Driveways

  • Decking

  • Turf

  • Garden Walls

  • Land Reduction       ...and much more.

Landscaped garden at a property in Cardiff

Kitchen Design & Installation

We believe choosing a new kitchen should be an enjoyable process, so let our expertise take all the stress away. Any design and special requirements can be taken into consideration so that we deliver a bespoke kitchen fitting service that produces results of the highest quality.

We offer:

  • Full Kitchen Design and Installation

  • Installation Only

A new kitchen installation inside a property in Cardiff, South Wales

Bathroom Design & Installation

Our bathroom design and installation services offer total peace of mind, with a limitless supply of creative options all built to the highest standard. We are here to build the bathroom of your dreams, with our expert craftsmen on-hand from start to finish.

We offer:

  • Full Bathroom Design and Installation

  • Installation Only

A new bathroom installation inside a property in Cardiff, South Wales

Handyman Services & Odd Jobs

It's not just large home improvement projects that we undertake, as we also offer regular handyman services to make life a little easier. Whether you lead a busy life or simply want the job done right, our multi-skilled craftsmen are here to help.

We offer:

  • Door Hanging and Door Fitting

  • Skirting and Architrave Fitting

  • Fascias, Soffits and Guttering

  • Fencing Installation

  • Gate Installation

Carpenter's tools in a builder's workshop in Cardiff, South Wales

Our Client Reviews

Excellent work carried out on two properties. Standard of work is amazing. Friendly and helpful team. I will definitely use again and will recommend their services to my friends and family. Thank you RGB Construction.

Are you ready to transform your home and garden?

Book your free quotation with no-obligation. We’re professional, friendly and experts at what we do.

Specialists in all aspects of home construction and renovation

Carry out your home improvements with local Cardiff building experts

Call us on 07946452571



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Three Best Rated badge 2024 for RGB Construction in Cardiff


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