Electric Trees

Guitar building courses, custom guitar builds and stringed instrument repairs based in Barnsley, Yorkshire. With many years of experience and time working with some of the best guitar builders in the country, luthier Martin Harmer delivers the highest quality craftsmanship and offers in-depth instruction on guitar building.

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About Martin

Guitar Building Courses

A select number of one-to-one and group guitar building courses, for all proficiency levels. Whether you are a master craftsman, or have never picked up a chisel, come design and build your own instrument with Martin

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Repair Services

If your precious No.1 has had an accident or simply needs a setup, we’ve got you covered. We specialise in stringed instruments and offer repair, modification and restoration work for guitars, violins, cellos, banjos, ukuleles and mandolins. From setups to refinishing and everything in between, check out our list of services or simply get in touch for a quote.

Excellent service. Cheerful , skilful, and efficient. Martin has exciting plans for the future too, and he deserves success. I'd definitely recommend him


Brilliant place! Went in to get my Output Jack fixed. The guy was really quick, and took the time to explain everything to me and teach me how to do it myself in future. I also got my strings changed at the same time! Would highly recommend! Great price too!


Had my Yamaha cpx1200 repaired which had two large holes in the back of the acoustic guitar. Martin hard work craftsmanship is out of this world. I had visited many luthier's who would not take on the repair and the cost does not reflect the quality of repair that has been completed.

Paul Stevens