John Kelly Construction Services

Construction and civil engineering services in the North Wales area.

John Kelly Construction Services is a successful growing business, supplying a wide range of construction and civil engineering services in the North Wales area.

We work for a wide range of clients including home developers, national construction companies, utilities and local authorities.

Based on an extremely high work ethic, John Kelly Construction has built a strong reputation for reliability, quality and professionalism. Continually striving for excellence, we work in partnership with clients to execute projects to exacting standards.

Latest Developments

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Coming Soon

Maes Berea, Bangor

1 Home Available

Bro Eglwys, Bethel

Sold

Phase 1 Bro Eglwys, Bethel

Sold

Swn y Fraint, Dwyran

About us

Careers

Cronfa JK

Latest Projects

John Kelly Construction Services has worked on a number of civil engineering, building, groundwork and related projects for various clients.

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Parc y Coleg

Park Aberkinsey, Rhyl Phase 5

Bro Infryn, Glasinfryn

Glyn Farm, Colwyn Bay

Llandygai Park and Share Facility

Llaingoch, Holyhead

Our company is committed to delivering projects proactively, in the most efficient and innovative ways possible, maintaining the highest standards in quality, safety and environmental respects.

Please contact us today to see how we can help you.

Latest News

New Welsh-Learner Lanyards

13th January 2026

Thanks to Llinos Medi, MP for Anglesey, for arranging the delivery of our new lanyards provided by the National Centre for Learning Welsh.

They help JK Construction and Menai Windows customers and clients easily identify who they can engage with in Welsh, supporting learners and encouraging more Welsh conversations. Purple lanyards for learners and black lanyards for fluent Welsh speakers!

Save the Children Christmas Jumper Day

12th December 2025

We raised £300 for Save the Children UK during 2025's #ChristmasJumperDay!

Menai Windows joins John Kelly group

17th November 2025

Exciting news as Menai Windows joins the John Kelly Group.

They have relocated to JKCS HQ, Star, Gaerwen, Anglesey, LL60 6AN.

You can still contact them on 01248 362219.

Their email address is info@menaiwindows.com

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