Your granny flat is ready to move in with our basic inclusions, keeping your project to time and budget — but a few special upgrades can add interest, value, and homeliness.
Our standard range and price contain everything you need for a turnkey home. A few thoughtful upgrades can make a big difference to how your home looks, feels, and functions. From striking features like cathedral ceilings and skillion roofs to practical additions like carports and wall-hung vanities, these are the little details that elevate a home. Browse through some of our most requested extras below—perfect for adding style, comfort, and long-term value to your new granny flat or extension.
Standard Ceiling and Roof Inclusions
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Roof Profile: Gable roof profile as standard
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Roofing Material: Colorbond custom orb roof sheeting, with your choice of colours from the Acrow Standard Range
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Ceiling Height: 2400mm throughout
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Internal Linings: 10mm plasterboard to all internal walls and ceilings, and 10mm WR villaboard to ensuite, bathroom, and laundry ceilings
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Cornice: 90mm cove cornice to all flat ceilings
Our standard designs offer quality, practical finishes to suit most homeowners — but if you’re looking to create something a little more unique, ceiling upgrades can have a big impact.
Raising the Roof: Ceiling and Roof Profile Upgrades
You can upgrade your ceiling height from the standard 2400mm to 2700mm, or even up to 3000mm, to create a more spacious, light-filled interior. Roof profiles can also be upgraded to raked ceilings or hip and valley designs, depending on your preferred style and the flow you want to achieve in your home.
Cathedral Ceilings
Cathedral ceilings instantly elevate the look and feel of a home, creating a sense of space, light, and luxury. Adding ceiling height—whether through a raked, vaulted, or cathedral style—can make even modest rooms feel grand and open. It’s a popular upgrade for living areas or master bedrooms, helping to draw in natural light, improve airflow, and add architectural interest that enhances both comfort and resale appeal.
What is a Cathedral Ceiling?
A cathedral ceiling has two equal sloping sides that meet at a peak in the centre, following the roofline. This creates a striking sense of height and space, often allowing for the inclusion of highlight windows to bring in even more natural light. Cathedral ceilings work beautifully in open-plan areas where you want to create a statement and a feeling of luxury.
What is a Raked Ceiling?
A raked ceiling refers to any ceiling that slopes in one direction. It’s usually created by following the pitch of the roof, resulting in a higher side and a lower side within a room. Raked ceilings can add a contemporary look, give flexibility for higher windows, and create an airy, spacious feel without the full height and drama of a cathedral ceiling.
What is a Gable Roof Profile?
A gable roof is our standard roof profile, included in all base Granny Flat pricing. It’s a simple, classic roof shape where two pitched sections meet at a central ridge, creating a triangular profile at each end. It’s a popular choice for its straightforward construction, good drainage, and timeless look, and it complements both standard and upgraded ceiling options well.
What is a Hip and Valley Roof?
Rather than two sides making the roof, as in the gable-roof profile, it will be at least 4 sides making up the roof. In this way, a hip and valley roof features multiple slopes meeting at hips (outward angles) and valleys (inward angles). This more complex roof shape allows for greater flexibility in the overall design and can add architectural interest to the exterior. It’s often paired with internal ceiling upgrades like raked ceilings for an elegant, high-end finish.
What is Square Set vs Cornice?
As our standard inclusion, a cornice (a moulded strip) is used where the wall meets the ceiling, typically with a 90mm cove cornice finish. A square set finish removes the cornice entirely, creating a clean, crisp 90-degree angle where the wall and ceiling meet. Square set finishes are often used with raked or cathedral ceilings to enhance a modern, minimalist style.
Challenges with Ceiling Upgrades
While upgraded ceilings add stunning character and liveability, there are a few considerations:
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Our standard floorplans and inclusions are carefully designed to meet fast approval and certification requirements, including energy efficiency (such as NatHERS ratings or BASIX certificates in NSW).
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Changes to rooflines, ceiling heights, or overall building height may impact setbacks and overshadowing, which can affect your Development Application (DA) or Complying Development Certificate (CDC) approval.
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Some upgrades may also require additional structural engineering, insulation adjustments, or adjustments to your energy efficiency report.
Our team will work with you to review any upgrade impacts and advise what’s possible under local council and planning rules.
Building Your Perfect Home
At Acrow, we start with a floorplan that fits your block and the flow you want in your home — and then we build it around your personal tastes and lifestyle. We recommend starting with an initial quote based on our standard inclusions and then selecting upgrades from there. It’s the simplest and most affordable way to achieve a home that feels just right for you.