Keystone Home Additions

Keystone Home Additions Specialising in First Floor & Ground Floor Additions in Western Sydney Keystone Building Services is your go-to builder in the Penrith Nepean area.

We specialise in Ground Floor Additions, Second Storey Additions, Home Extensions, Home Additions and Renovations. We are based in Penrith and service the Greater Western Sydney, Inner West Sydney, The Hills District, Blue Mountains, North Western Suburbs, Cranebrook, Cambridge Park, Emu Plains, Blaxland, Werrington, Castlereagh, Leonay, St Marys, Mulgoa, Mount Druitt, St Clair, Parramatta, Greystanes, Kellyville, Kingswood, Glenmore Park, Eastwood, Ryde, Colyton.

28/05/2026

The wait is over. Here's the full reveal of the Keystone build we teased earlier in the year. A complete second storey addition that transformed this home from the roof up. New upper level, new roofline, new windows, and a finish that looks like it was always meant to be there.

We love it when the roof goes on! We're adding 45 square metres to this family's home and they didn't even have to move ...
27/05/2026

We love it when the roof goes on! We're adding 45 square metres to this family's home and they didn't even have to move out. Every Keystone addition is built around your family's schedule, with as little disruption as possible along the way. This is just what it looks like when the job is done right.

Who's keen for the final reveal soon? 👀

25/05/2026

For 12 years Corinne's been the one on the other end of the line when you call us, holding down the fort behind the scenes and being across absolutely everything... we really are saying goodbye to a legend!

It's her second go at retirement, so this time we're making sure she sticks to it so she can go on some well-deserved adventures now that she has the luxury of time. She's earned it!
A big thanks for over a decade of dedication, all the laughs and everything you’ve brought to the team, Corinne... it's the end of an era... you will be missed!

From dated to dream home, this St Clair transformation added 169m², three bedrooms, two bathrooms, new living spaces, an...
18/05/2026

From dated to dream home, this St Clair transformation added 169m², three bedrooms, two bathrooms, new living spaces, and a sleek double garage. Finished with solar skylights, fresh render, and a modern entryway, it’s style, space, and smart design in one.

Ready to transform your space? Call us on 02 4722 5466 or visit keystonebuilding.com.au

One of our freshly completed second-storey additions. The kind of result that makes the neighbours take a second look.Vi...
13/05/2026

One of our freshly completed second-storey additions. The kind of result that makes the neighbours take a second look.

Visit keystonebuilding.com.au or give us a call on 02 4722 5466 to learn more about our specialised approach to home extensions.

Our clients are often surprised by what’s possible with a Keystone home extension.You already have the home. We’ll help ...
12/05/2026

Our clients are often surprised by what’s possible with a Keystone home extension.

You already have the home. We’ll help transform it into a space you can enjoy for years to come.

Visit the link in our bio or call 02 4722 5466 to learn more about our specialised approach to home extensions.

Thinking about transforming your home? Here’s what’s possible with the right design and build team behind you!
11/05/2026

Thinking about transforming your home? Here’s what’s possible with the right design and build team behind you!

A renovation is more than just updating finishes, it’s about improving the way your home works for you.From rethinking l...
06/05/2026

A renovation is more than just updating finishes, it’s about improving the way your home works for you.

From rethinking layouts to upgrading key spaces, every stage is designed to create a more functional, comfortable home.

At Keystone, we guide you through the entire process to deliver a result that feels seamless.

It’s the little details that make the difference.Sleek half-height shelving with vertical panelling add depth and charac...
05/05/2026

It’s the little details that make the difference.

Sleek half-height shelving with vertical panelling add depth and character to the space.

The power of a second-storey addition! We turned this modest suburban home into a contemporary two-storey masterpiece. S...
04/05/2026

The power of a second-storey addition! We turned this modest suburban home into a contemporary two-storey masterpiece. Same location, brand new lifestyle.

Explore our specialised home extensions at keystonebuilding.com.au, or call 02 4722 5466 to start planning your dream space

A classic Emu Plains home with a clean white exterior, plantation shutters, and a covered front porch. The kind of stree...
28/04/2026

A classic Emu Plains home with a clean white exterior, plantation shutters, and a covered front porch. The kind of street appeal that holds up well over time.

Visit keystonebuilding.com.au or give us a call on 02 4722 5466 to learn more about our specialised approach to home extensions.

Address

1/29 Coombes Drive
Penrith, NSW
2750

Opening Hours

Monday 8am - 5pm
Tuesday 8am - 5pm
Wednesday 8am - 5pm
Thursday 8am - 5pm
Friday 8am - 5pm

Telephone

+61247225466

Website

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