Residential & Commercial Maintenance

SJM Properties

Building and maintenance company serving South Wales

SJM Properties has been established since 1988, covering the M4 corridor from Newport to Swansea and the connecting valleys.

We have a wide range of clients, ranging from commercial, local authority, letting agents and private residential.

Our vision is to build an outstanding customer relationship through our clients by providing a professional and transparent service to ensure the smooth completion and total satisfaction.

Services we offer

We cover a full spectrum of services that include bathroom and kitchen conversions, knocking through rooms to providing space and light to bring properties to the modern day expectations. May it be an individual room, full renovation, extension or new build.


Flat: Fiberglass, Felt, Single Ply or Pitch Conversion
Pitch: Slate, Tile, Sheet, Man Made or Natural.

Bathrooms / Kitchens

Conversion, replacement or upgrade of existing.
Disabled adaptions


Single or Double Storey
Attics, Dormas, Garage conversions
Conservatories, Orangeries with Chinese Lanterns


Full service is offered from initial survey to carry out a full remedy
which carries a 25 year guarantee.


From single double storey, from ground to the roof.

Windows and Doors

PVC, Timber, Alloy, Double Glazed
Renewed or Maintained


From panels to featheredge to suit your needs

Decorations, Flooring, Rendering

This is just an overview of the overall spectrum of the services we provide

Response Repairs

Responding to call outs from private, tenanted, landlord and agencies by muti trade operatives who can adapt to any specific requirements.

Heating and Plumbing

From Gas, General Maintenance, Combi Conversions, carried out by Gas Safe registered operatives


From additional sockets to full rewires, extraction fans to air conditioning, carried out by N.I.C Registered operatives

People we've worked with


  1. Carole Thomas George

    We have been working with Steve for the last 20 years, he has been a large part of our maintenance and building program providing a professional service, and will hopefully be with us for many years to come.

  2. Stephanie Hern and Crabtree

    SJM has been part of our maintenance contracts for many years, providing us with a professional, loyal service. We can recommend them to provide a quality service

  3. Jessica Peter Alan

    Working with Steve and his company has been a real pleasure, thanking them for their swift response.

  4. Mrs H Penarth

    SJM has carried out a kitchen conversion knocked through into the dining room, fitted a new roof and has built a conservatory over the years. They have always delivered on time and within budget.
    Thanks SJM


Everywhere in between


Everywhere in between


Contact us

If you have any questions please don't hesitate contacting us via email or the office telephone number.
01446 734127