Bedrooms and bathrooms
Create private bedrooms, family bathrooms and storage away from the main living areas.
Second-storey additions across Sydney
More space upstairs.
More life at home.
Add the bedrooms, bathrooms and living space your family needs—without giving up your location, garden or the home you already love.
- Design, approvals and construction managed
- Fixed-price HIA building contract
- Extended 10-year structural warranty
8,000+builds completed
Since 1979building across Sydney
10 yearsextended structural warranty
119641CNSW builder licence
Build up, not out
Keep your garden and unlock a new level of living
A carefully planned upper-floor addition can transform how your family lives while preserving valuable outdoor space.
We assess the existing structure, council requirements and the way you use your home, then bring the design and construction together as one coordinated project.
Parents’ retreat
Add a generous main bedroom, ensuite, walk-in wardrobe and a quiet place to unwind.
Flexible family space
Plan an upstairs living room, study, guest room or adaptable space for a growing family.
Designed around your existing home
A new level that feels like it has always belonged
The strongest additions do more than create floor area. They improve natural light, privacy, circulation and the relationship between old and new.
- Design shaped around your family and property
- Structural requirements considered from the start
- Materials and proportions selected for a cohesive result
Space for the next chapter
Stay in the neighbourhood you already know
A second-storey addition can give a growing or multi-generational family the room it needs while keeping established connections to schools, work, friends and community.
One experienced team
From first ideas to your completed upper floor
- 1
Home consultation
We inspect your home, discuss your priorities and consider what may be achievable.
- 2
Concept and feasibility
Your addition is planned around structure, site constraints, budget and everyday living.
- 3
Approvals and contract
Documentation, approvals and a clear fixed-price HIA building contract are coordinated.
- 4
Build and handover
Your project manager coordinates construction, quality and communication through completion.
Make your plans possible sooner
Ask about the Pay Later finance offer
No repayments and no interest for 12 months. Eligibility, lending criteria, fees and conditions apply.
Common questions
Planning an upper-floor addition
A home consultation is the quickest way to understand your property, priorities and likely project pathway.
Can every home support a second-storey addition?
Not automatically. The existing structure, foundations, roof form, planning controls, access and site conditions all need to be assessed before the right solution can be recommended.
Do you handle the design and council approvals?
Yes. Sydney Extensions & Designs coordinates design, documentation and the appropriate approval pathway as part of the overall project process.
Can we remain at home during construction?
It depends on the scope, structural work and access to essential facilities. We explain the likely disruption and staging so your family can plan ahead.
How much does a second-storey addition cost?
Cost varies with floor area, structural requirements, site access, services, finishes and the rooms being added. A home consultation provides the basis for a meaningful estimate.
Start with expert advice
Discover what your home could become.
Book a free consultation with Sydney’s second-storey addition specialists.