Tel : 07401 088 868   E-Mail :

Belfast Building & Roofing


  • #Builders Chimney Repairs Belfast Bangor Holywoood Chimney Builders Repairs Roofers

Hi there and welcome to my homepage. My name is James Mulvenna and I am a registered Master Builder, Carpenter and Dry-Liner. I have 30 Years experience in Construction having sub contracted in N Ireland Germany, Holland, France UK & ROI. I speak fluent German and some French. I have contracted on major Hotel and Commercial Projects but still build Home Extensions, Renovations, Conversions and High Spec Garden Rooms. If you’re interested in Partnering or extending or improving your home, please send your Plans, Info, Photos etc to you can also whatsapp or ring me on 07401088 868. I also accept invitations for evening Zoom calls to discuss your Project. Google Page here, Facebook Page here,  Videos here

For Rough Square Meter Rate for Home Extensions Click Here


 BuildersRoofers, & Chimney Expert’s.

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  • Builders Belfast Malone Deramore Balmoral.
    Fifth Ave Bangor - Concrete Structural Repairs.

After 30 years in Construction our diverse skills include; Extensions, Renovations & interiors including Insulation, Bathrooms, Drylining Ceilings, Partition Walls.

We also offer Structural Alterations, Structural Repairs, Chimney Support Brackets, Chimney Repairs, Window Sill repairs.     

We have a proven record of delivering Projects on time and within budget.


Acoustics are forgotten until you hear it.

Creating living spaces is all about people and how they want to live, work and relax. We focus on matching impressive aesthetics with our superior acoustics. One may attract people to the space but good acoustics make them stay. We offer stunning Acoustic Ceilings and Walls to suit any project Private or Commercial.

Belfast Builders Chimney Repairs Facebook

We Negotiate contracts for.

Home Extensions. Improvements.
Refurbishments. Roof Space Conversions
Property Repairs, Drylined Partition Walls,
Ceilings & Ceiling Repairs, Roof & Chimney Repairs,
Window Sill repairs,  & Many Misc Smaller Jobs


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We can arrange a home visit to discuss your project in context.

We can deal with all the paperwork for your planning and Building Control applications. Letting devote more time & energy to the design process.

We can also advise you on Design elements and avoid limitations to the local Regulations process.

Contractor Surveys, Estimates & Advice are free on all private contracts.

  • Identifying potential problems at design stage.
Builders Belfast
  • Making your dreams Reality.
  • Achieving real time money savings.

About Us 

Based in Bangor near Belfast, we have developed a comprehensive service partnering with major Irish Company’s including Chubb Otis, Mercedes Tesco & Totalis Solutions

We value our skill set and awareness of clients needs. Our key goal is customer satisfaction driving contracts forward on time within Budget.

Call James direct on 07401 088 868.

Terms & Conditions.

Ards Containers   Haldane Fisher Bangor 
Balloo Trade Frames   Murdocks Castlereagh
Open Mon – Fri, 8am to 7pm, Sat, 9am to 2pm.

Liability Insurance  Handwerks Kammer