Two-storey home clad in black vertical boards, with an outdoor seating area

Services · Second-storey additions · Cronulla

Second-storey additions in the Sutherland Shire.

Add a whole new level to your home, designed and built by a licensed, insured local builder with 15+ years’ experience.

Second-storey additions

When there’s no room to go out, go up.

If your single-storey home feels too small, you could sell and start again, but that isn’t an option for everyone. And when the house is close to a neighbour or the boundary, there’s no room to extend outwards.

A second-storey addition gives you the space without giving up the backyard. If you already have an upper level, we can extend that too.

Master Builders Association of New South WalesMember of Master Builders NSW · Licensed & insured, Lic. No. 464683C
Dining area beneath a double-height void with a black steel balustrade and tall windows

What could your new level hold?

  • Bedrooms and a bathroom

    Add a bedroom and bathroom upstairs, and free up a downstairs room for a nursery close to the main bedroom.

  • A laundry or utility room

    Washing machines, dryers, laundry tubs and hot water systems take up room. Moving them gives you space and storage elsewhere.

  • Living or kitchen upstairs

    Many townhouses have the kitchen and living areas upstairs, and it works well. Talk to us about what suits your home.

What’s included

What we can do for you.

Every job is different. These are the kinds of work we can take on; tell us what you have in mind and we’ll talk you through the options.

  • New upper levels

    A second storey added to a single-storey home.

  • Upper-level extensions

    Extending an existing second storey.

  • Bedrooms & bathrooms

    Extra bedrooms, ensuites and bathrooms upstairs.

  • Laundries & utility rooms

    Room for appliances and storage, off the ground floor.

Our process

Straightforward, from first chat to handover.

  1. 01

    Have a chat

    Call 0418 219 759 or send an enquiry. Tell us what you’d like to do and roughly what you’d like to spend.

  2. 02

    Site visit & design

    We look at your home and block, talk through what you need upstairs, and work through the design with you.

  3. 03

    Clear quote

    You get a clear quote before any work starts, so you know what’s included.

  4. 04

    Build & handover

    We run the job, coordinate the trades and keep you updated, then walk through the finished work with you.

Why JN Building Design

A local builder you can check out.

  • 15+

    Years’ experience

    More than 15 years designing, building and renovating homes.

  • 464683C

    Licensed builder

    Our NSW builder’s licence number. Ask to see it.

  • Insured

    Insured work

    Insured for the residential building work we do.

  • MBA

    Master Builders NSW

    A member of the Master Builders Association of NSW.

Based in Cronulla, building across the Sutherland Shire, the Eastern Suburbs and the Inner West.

See the suburbs we cover

Get a free quote

Let’s talk about your project.

Tell us what you have in mind and we’ll talk you through the options. The quickest way to start is a phone call.

Master Builders Association of New South WalesLicensed & insured · NSW Builder Lic. No. 464683CABN 13 673 592 633