Second Storey Home Extensions & Additions

Second-storey additions are among the most structurally complex builds a homeowner can take on, and exactly where we do our best work.

More space, without sacrificing your backyard or your address

For many Sydney homeowners, a second storey home extension is the smartest way to get the space your family needs without moving house, selling in a difficult market, or giving up your outdoor area. Instead of extending out, you go up.

But a second storey house extension is not a project for every builder. It requires a genuine understanding of structural engineering, load-bearing systems, and how an existing home will respond to a new upper level. The wrong builder on the wrong brief is where first floor addition projects go wrong, run over budget, and drag on for months longer than promised.

Hannon Constructions has built a specific reputation for taking on complex structural builds, including second storey home extensions, first floor additions, and upper level extensions across Sydney’s Hawkesbury and Hills District. Ryan has the experience to read an existing structure, understand what it will take, and deliver a finished build that feels like it was always part of the home.

If you have been told your project is too difficult, or you want a builder who will give you a straight answer about what your second storey house addition actually involves, talk to us first.

What Drives Us

What we bring to every secondary dwelling project

Structural expertise you can rely on

Second storey home extensions live and die on the quality of the structural work. We manage all engineering, load assessments, and structural requirements from the ground up, working with certified structural engineers on every upper level build.

Build from your plans

Bring us your architectural drawings or building designer plans and we will build your second storey home extension exactly as designed. We work from your brief, coordinating every trade and every detail throughout.

Full project management

Council approvals, engineering certification, certifiers, trades coordination, and site supervision. We manage every element of your first floor addition so you have one point of contact from the initial conversation through to handover.

Honest assessment of your existing home

Not every home is a straightforward candidate for a second storey extension. We will give you an honest read on your existing structure, what it will take to support an upper level addition, and what the build is realistically going to involve before you commit to anything.

Experienced with complex and constrained sites

Steep blocks, difficult access, older homes with unconventional construction methods, tight council requirements. These are the second storey builds other builders avoid. We are comfortable with complexity and have delivered upper level home extensions in conditions that require real problem-solving on site.

Quality finishes throughout

The structural work has to be right, but so does everything above it. Master bedrooms, ensuites, additional bedrooms, sitting rooms, balconies. We deliver second storey house additions that are finished to the same standard as the rest of the home.

How It works

Your second storey, step by step

1 Tell us about your project

Once you get in contact with our team we will ask you to complete an online form which helps us understand your project goals, budget, timeframe, inspiration and overall vision of your project. We organise a phone call – Ryan personally calls you to discuss your project in detail, answer questions, explore ideas and determine the best next steps for your renovation or build.and ensure it aligns with our expertise, values and service area so we can deliver the best possible experience and outcome.

2 Initial Site meeting

We meet onsite to review your home, discuss ideas, explore possibilities, assess challenges and begin shaping the scope, vision and strategy for your project.

After the meeting, we provide detailed notes, recommendations and the next steps required to move your project into the planning and design phase.

We collaborate closely with you and your architect/designer to refine layouts, selections, functionality and construction details before pricing begins.

3 Approvals & planning

We handle the paperwork From council approvals to engineering sign-offs, we manage the documentation process so you don’t have to. Tara coordinates all scheduling, compliance, and pre-build administration, keeping everything on track before a single nail is driven.

4 Build & handover

Ryan is on site, every step of the way. We’re not a company that quotes and disappears. Ryan is hands-on throughout the entire build, managing trades, maintaining quality standards, and keeping you updated at every stage. You’ll always know where your project is at.

We’re not done until you’re happy Final walkthrough, defects rectified, and a thorough handover. We don’t consider a job finished until every detail is right. And we’re still contactable after handover, because the relationships we build with clients matter as much as the homes we build for them.

Our Work

Recent second storey home extensions

— Hawkesbury & Hills District

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Professionalism and workmanship second to none

Just a small note of appreciation for the work you completed at our home. We have used a number of different tradesmen over the years and you have been by far the best tradesman we have dealt with. Your professionalism, workmanship and communication are second to none.

The project ran flawlessly, and with you being so meticulous with the quality of your work, the end results are amazing. We are extremely pleased with the results and have received numerous compliments.
We found it so much easier to work with a tradesman who kept us informed at every step along the way and completed the work upon the agreed timetable.

We would not think twice about using your services again in the future or recommending your work to our family and friends.

Stuart & Lana, Baulkham Hills

Delivered the highest possible quality, beyond our brief

We were referred to Ryan through another tradesman who we knew was a perfectionist so we had every faith that Ryan and his team would be able to deliver the high standards of building and finishes we wanted.
Every step of the way we knew Ryan had our best interests at heart and he often went beyond our brief to ensure he delivered the highest possible quality.

Ryan was able to plan ahead, stay on budget and provide excellent service and advice at all times.
We have no hesitation in recommending Hannon Constructions – in fact we have done it already and would do it again!

Nigel and Rebekah , North Rocks

So happy, we've already contracted Ryan for a second project

We decided to run with a local builder Ryan Hannon from Hannon Constructions to do some renovations to our house. After speaking with Ryan and listing to his ideas and vision my wife and I could not be happier with the end result.

From start to finish nothing was a problem for Ryan and his team, we wanted a few changes along the way, and he went beyond what was required to make sure that the job was finished and completed to a very high standard.

To anyone thinking of contracting Hannon Constructions to Build, Renovate, Fix Up, Change, Alter anything we would recommend them with the utmost confidence that you will get a fantastic job from a very hard working and most importantly honest man who knows his trade extremely well.

We were that happy with the results, we have already contracted Ryan to start a second project at home for us.

Gavin & Carol, Sackville

Common Questions

Second Storey FAQs

Can any home have a second storey extension added?

Most homes can, but the structural requirements vary significantly depending on the construction method, age, and condition of the existing building. Some homes need significant ground floor reinforcement before an upper level addition can be built. Ryan will assess your home and give you an honest answer about what your second storey house extension involves before you go any further.

Do I need council approval for a second storey home extension?

Yes. Second storey home extensions and first floor additions in NSW require a Development Application through your local council in most cases. We manage this process on your behalf, including coordination of your structural engineer, building designer, and certifier.

How long does a second storey home extension take?

From first conversation to handover, most custom granny flat builds take between four and nine months depending on the approval pathway, design complexity, and site conditions. Ryan will give you a realistic timeline upfront.

Is a second storey home extension worth it compared to moving?

For most families in the Hawkesbury and Hills District, yes. With Sydney property prices where they are, adding a second storey to a home you love in an area you know often makes far more financial and personal sense than selling, buying, and moving. A well-executed upper level home extension also adds significant value to your property.

What does a second storey house addition typically include?

Most first floor additions include a new master bedroom with ensuite and walk-in robe, additional bedrooms, and a sitting or study area. Some include a balcony or raked ceiling features. Every project is different and we build from your plans and brief.

Second Storey Home Extension Builder

— Hawkesbury, Hills District and Greater Sydney

Hannon Constructions builds second storey home extensions, first floor additions, and upper level house extensions across Sydney’s Hawkesbury and Hills District. From structural assessment and council approvals through to full construction and handover, we manage every element of your second storey build. Complex second storey additions are not a problem for us, they are what we do best. If you are looking for a second storey home extension builder who will give you straight answers and deliver exceptional work, let’s talk.

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