Your domain registration is pending. Check back in an hour

Costin Welding And Fabrication, Mobile Welding

Mobile and shop welding services based out of Portsmouth New Hampshire and serving all of New England.
Open 24 hours
Header image for the site


Costin Welding at the moment will continue to provide welding services during these difficult times.

Yes we work in the snow! If you plow this winter and break something we can be on site for emergency repairs 24/7!

Our mobile welding truck makes it possible to weld on site 24hrs of the day! If you have a piece of equipment that is impossible or very costly to move on site welding will save you time and money! Or if you are building a home or large project that requires welding to be done on site we have you...

Read More

Building a custom home or a remodel? Give us a call! From beams and columns to custom railings and furniture we have you covered!

Looking for custom handrails? Give us a call we offer custom built railings built from stainless,steel or aluminum!


8 months ago
Had some custom railings built by Costin Welding. I wasn’t sure exactly what I wanted but the owner gave me great ideas of what would work with my home! Railings came out better than I could imagine!
- Tim O
7 months ago
I needed some repairs to an excavator bucket. Will came one site and welded new teeth on the bucket and repaired some cracks! Great work and very professional!
- Eric B
3 months ago
Will replaced the teeth on one of our excavators in addition to repairing some cracks. I will be using him in the future.
- Henry H

On site and shop welding services

Costin welding offers mobile and shop welding of Steel,stainless steel and aluminum! From heavy equipment to metal railings we have you covered! Our shop is in Portsmouth NH. We also provide welding services in Portland Maine and all of New England! 24 hr emergency welding services available! 

Contact Us


Call now
  • (603) 531-8214

Business Hours

Mon:Open 24 hours
Tue:Open 24 hours
Wed:Open 24 hours
Thu:Open 24 hours
Fri:Open 24 hours
Sat:Open 24 hours
Sun:Open 24 hours
Contact Us
Message sent. We'll get back to you soon.