Your home addition specialists

We're based in Penrith, and work across Western Sydney, the Hills District, South-West Sydney, and surrounding areas including the Hawkesbury and Blue Mountains.

Most Second Storey Additions take between four to eight months, depending on complexity, weather, and council approvals. Your build is unique and we'll provide a clear timeline during the planning phase.

Most homeowners are able to live in their homes while getting a second storey or extension, it's often dependant on how much they're getting done to the original part of their house and personal preference. In some cases, especially during demolition or structural work, it may be safer and more practical to vacate the property temporarily. We’ll discuss this with you upfront so you can plan accordingly.

Yes, the ground floor must be able to support the additional weight of the second storey. Our structural engineers will assess your property and design neccessary reinforcements, and we'll manage all the nitty gritty stuff, like applications to Council / Building Certifier and other authorities.

We offer stylish designs made to seamlessly blend in with your existing home. Keystone consultants will present you with examples of before and after images to give you full confidence in the final outcome. You can see some of them HERE

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For 95% of our projects, yes you can still live in your home during construction. Keystone commits to keeping your home clean and secure. We will make every effort to keep the disruption to an absolute minimum so you can stay in your home as we build but there will always be some dust, dirt and noise. Our friendly tradesmen use drop sheets and clean up after themselves at the end of every day’s work.

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On average it takes from 2 months to 5 months but can take longer, depending on the size of your addition. No matter how big the job, Keystone gives you a precise and fixed build time bound by a contract with penalty clauses.

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Our Project Manager is readily available to answer any questions, and will also visit and/or call you for decision making to keep you updated. You will have their phone number to call if you have any questions.

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Yes, Keystone has a number of unique guarantees to give you greater peace of mind. Get in touch to find out more.

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Yes, we always give you a reference along with a list of previous work for you to drive by and look at.

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No, Keystones Building Consultants can assist you with the design and our draftsman will prepare the plans for council approval. However, if you already have an architect we are happy to work with them to complete the project.

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Yes! Keystone can take care of every aspect of the design and building process including engineering drawings and appropriate approvals.

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