For 30 years, Trustmark Roofing and Building has been the go-to choice for dormer window installations in the North East. Partnered with industry-recognised organisations like Checkatrade, we guarantee top-notch craftsmanship for your residential needs.
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4.9 Rating
4.1 Rating
4.9 Rating
We’re not just tradespeople but your local specialists for North East building solutions that last. When you opt for our dormer window installation, you benefit from years of specialised experience, ensuring a hassle-free process from planning to completion.
Our focus is not just to add a dormer window but to elevate your living space with enhanced natural light and improved ventilation—qualities that directly contribute to your home’s long-term value.
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Posted on chris nelsonTrustindex verifies that the original source of the review is Google. Recently used Trust Mark to replace a couple of tiles and general health check on our roof, prompt professional service. This is the 3rd time we have used trust Mark. Highly recommended.Posted on Shirley Ann BinghamTrustindex verifies that the original source of the review is Google. From the first visit to give an estimate for ridge tile, lead flashing and tile replacement I was happy with Trustmark. My questions were answered and different options for repair were explained by Lee. 3 different teams visited to to do the work on consecutive days and all were pleasant and hard working. Ross and Morgan completed the job and made sure I was happy with the work and took away all rubbish. Thank you all.Posted on Ian DavidsonTrustindex verifies that the original source of the review is Google. Great experience from initial quotation request to completion of works. Old concrete fixed ridge tiles removed and replaced with new dry ridge system on both sides of house including dormer. Great looking new dry verge system also fitted. In addition repair works to roof valleys and lead around chimney were carried out. Special thanks to Jay and Ross for their professionalism & quality of workmanship. They were both extremely patient & took time to explain to me the scope of works, what they were doing & why. I would not hesitate to recommend Trustmark to anyone needing a quality roofing job done by truly dedicated professionals. Ian, Darlington.Posted on Amelia DoranTrustindex verifies that the original source of the review is Google. While I wasn’t intending to replace the roof, the team were fab at helping me get what was needed done, and were very efficient and friendly while doing it. Thanks to Wilky, Gary and Gary for your hard work!Posted on Matthew RowellTrustindex verifies that the original source of the review is Google. New roof installed and honestly could not fault the service from start to finish. Professional, friendly and efficient. No mess left. Constant communication. Amazing service throughout happily recommend to others and will be using again
Choosing Trustmark Roofing & Building for your dormer window project means trusting a company with an outstanding reputation. Our dedication to excellence, backed by three decades of experience, ensures you receive top-notch service and impeccable craftsmanship. As a family-owned business, we prioritise your satisfaction and take great care to enhance your home’s aesthetics and functionality.
Our affiliations with Checkatrade and the Consumer Protection Association further attest to our commitment to quality and reliability. By selecting Trustmark roofing company, you can be confident that our skilled team will bring your vision to life while delivering long-lasting results that elevate your North East home. We provide other service options as well, just visit our main page.







Below find a list of three or four common questions we asked about this service.
Planning permission is generally required for dormer window installations. However, some projects may fall under permitted development rights. We recommend consulting with your local planning authority for specific guidance on your property.
From our experience, potential disadvantages of dormer windows include higher installation costs, possible heat loss if not well-insulated, and increased maintenance requirements due to their design. However, these drawbacks can be mitigated through careful planning and expert installation.
In our experience, a well-designed and professionally installed dormer window can add significant value to your property by increasing living space, enhancing aesthetics, and improving natural light, all of which are appealing features to potential buyers.
In our experience, dormer roofs can leak if not properly installed or maintained. However, with expert installation and regular upkeep, the risk of leaks can be minimised, ensuring the longevity and performance of your dormer window.
Take advantage of the opportunity to enhance your home with the help of our expert dormer window contractors at Trustmark Roofing & Building. Contact us today for a quick, simple quote process that fits your busy schedule. Our team can visit your property within 24 hours, providing you with a written quote for your peace of mind.
Experience our fully transparent approach by visiting our showroom to explore various designs and materials. With our expertise and dedication to quality, you can be confident that we’ll bring your vision to life. Get in touch now and let us elevate your home with a stunning dormer window addition.
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