Built to last.
The Sydney builder that gets it right the first time. Licensed, insured and 5-star rated — trusted by homeowners in Mosman, Double Bay and the Eastern Suburbs.
Serving Sydney since 2018 · Licensed & Insured · Free Quotes
“The best in the business. Carpentry to perfection and detail.” — John Kandylas, Google Review ★★★★★
We don't cut corners.
We build them properly.
BuiltByAJ is a Sydney-based premium building and carpentry company built on one principle — do the job right. Every time. We bring the same uncompromising standard to every project, every suburb, every client. No shortcuts, no hidden costs, no excuses. Just quality workmanship that stands out long after the job is done. We are also Sydney's authorised installer for NordicWellness Australia — bringing premium sauna installation experiences into homes across the city.
Serving Sydney since 2018. Licensed and insured.
Follow our work
New projects posted regularly — follow along @builtbyaj_
Sauna installations
done right
Sydney's authorised NordicWellness Australia installation partner
Sydney projects that speak
for themselves
Full Renovation · North Wahroonga · 2024
Custom Build · Blakehurst · 2025
Laundry Renovation · North Wahroonga · 2025
Kitchen Renovation · Wahroonga · 2024
What we build
across Sydney
From a single door replacement in Mosman to a full custom build in the Eastern Suburbs — every job gets the same standard of care.
Get a Free QuoteCarpentry & Fit-Outs
Hand-crafted timber work, precision fit-outs and repairs built to the highest residential standard. No flat-pack solutions — everything made and installed properly.
Door Installation Sydney
Supply and installation of internal and external doors — solid core, flush or feature. Perfect alignment, quality hardware and clean reveals every time.
Framing & Structural Work Sydney
Wall framing, structural alterations and load-bearing work done with proper planning, full compliance and no half-measures.
Decking & Outdoor Structures Sydney
Hardwood and composite decking, outdoor platforms and privacy screens built to withstand Sydney's climate without compromise.
Awnings & Pergolas Sydney
Custom steel awnings, pergolas and shade structures designed to complement your home — built to last decades, not seasons.
Renovations & Custom Builds Sydney
Full home renovations and custom builds — dedicated project management throughout, no hand-offs. On time, on budget, no excuses.
Sauna Installation Sydney
Premium sauna installation from delivery through to final fit-out — fully integrated into your home. Every detail handled for you.
Official Sydney Installation PartnerThe standard every job is held to
Licensed & Insured
Fully licensed under the NSW Home Building Act with public liability insurance on every single job.
5-Star Rated
18 five-star Google reviews from real Sydney homeowners. No exceptions, no excuses.
Always On Time
We show up when we say we will. Your time is valuable and we treat it that way.
Direct Communication
Call or WhatsApp and get a real response. No call centres, no delays, no runaround.
Ready to get started?
What Sydney clients
say about us
“The best in the business. Carpentry to perfection and detail. Some call him OCD — it’s what we need. Well done.”
“What an amazing job Alexander did for my home. We had recently purchased a sauna that Alexander installed very neatly in our backyard and I am more than happy with the final result. Beautiful work Alex!”
“Great work from Alex! Our friend Jean-Paul recommended Alexander to refit & install doors at our new place and they came out perfect! Highly recommend.”
“Alexander consistently delivers high quality carpentry with great attention to detail. Reliable, professional, and easy to work with. Highly recommend!”
“Highly recommend BuiltByAJ. Fantastic bloke and very respectful. His attention to detail is unreal and he puts his customers first every time.”
“Top work skills. Knows how to deal with customers, treats people with respect and most importantly delivers quality work. Highly recommend — jobs will be quality and fast.”
“Great experience from start to finish. He was professional, reliable, and paid close attention to detail.”
“Would highly recommend AJ to anyone. An extremely skilled carpenter who always does a fantastic job and works very hard.”
“Reliable, everything explained clearly. Highly recommended — a pleasure working together.”
“I engaged BuiltByAJ to do some repairs around the house and I couldn’t be happier. Alex was professional and on time.”
Our Sydney process,
made simple
Get in Touch
Call 0432 826 086 or submit a quote request online. We'll discuss your project, answer your questions and give you an honest overview — no obligation.
Site Visit & Written Quote
We come to your Sydney property, assess the job in person, and give you a clear written quote. No surprises. No hidden costs.
Delivered. Every Time.
We deliver. On time. Site left clean. Finished to the standard BuiltByAJ is known for across Sydney.
Sydney's
premium suburbs
Based in Bexley, BuiltByAJ services homes and properties across all of Greater Sydney. From Mosman and the Eastern Suburbs to Inner West, Sutherland Shire and beyond — wherever the job is, we'll be there.
Not sure if we cover your area? Call us on 0432 826 086.
Primary Focus
- Mosman
- Double Bay
- Potts Point
- Eastern Suburbs
- Inner West
- Vaucluse
- Rose Bay
- Woollahra
Also Servicing
- Sutherland Shire
- St George
- Bayside
- Sydney CBD
- South Sydney
- Hunters Hill
- Manly
- Cronulla
- Wahroonga
- & surrounding suburbs
Common questions
answered
We're based in Bexley and cover all of Greater Sydney. Our primary focus is Mosman, Double Bay, Potts Point and the Eastern Suburbs — but we regularly work across the Inner West, St George, Sutherland Shire, Bayside and Sydney's North Shore. Not sure? Call us on 0432 826 086 and we'll tell you straight away.
Yes — always. We come to your site, assess the job in person and provide a clear, itemised written quote with no hidden costs and no obligation to proceed. We don't pressure you and we don't charge for our time.
Yes. BuiltByAJ holds a valid NSW builder's licence and full public liability insurance. Every job is completed to the NSW Building Code of Australia standards. Our credentials are available on request — we're proud to provide them. ABN: 58 303 616 851.
It depends on the scope. A door installation typically takes half a day to a full day. A custom deck runs 2–5 days depending on size and complexity. A partial renovation can take 2–6 weeks. We give you a firm, realistic timeframe at the quote stage — and we stick to it.
We cover the full range — from small carpentry repairs and door replacements through to full home renovations and custom builds. Common jobs include: decks and pergolas, door installation, wall framing, custom fit-outs, sauna installation, steel awnings and cabinetry. If it involves building or skilled carpentry, call us — we'll tell you honestly whether we can help.
Yes — we are Sydney's authorised installation partner for NordicWellness Australia. We handle everything from delivery through to final fit-out, fully integrated into your home. Contact us for a free sauna installation quote.
Sydney homeowners choose BuiltByAJ — over 50 projects delivered
ABN: 58 303 616 851
Get a free quote
from your Sydney builder
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BuiltByAJ is a licensed and insured Sydney building and carpentry company with over 7 years' experience delivering premium residential construction across Greater Sydney. Based in Bexley, our team operates across every corner of the city — from heritage homes in Vaucluse and Rose Bay to modern renovations in Paddington and Woollahra. Trusted by homeowners across Mosman, Cremorne, Neutral Bay and the Upper North Shore, as well as Kingsgrove, Balmain, Hurstville, South Coogee and beyond. Premium building and carpentry across Hunters Hill, Gladesville, Drummoyne and the Inner West. Serving Cronulla, Burraneer, Sylvania Waters, Blakehurst and all of the Sutherland Shire. Wahroonga, Turramurra, Pymble, Gordon and the Hills District — we cover it all. Services include custom carpentry and timber fit-outs, wainscoting installation, cedar cladding, door installation and replacement, wall framing and structural work, hardwood and composite decking, custom pergolas and steel awnings, sauna installation, and full home renovations. We are also Sydney's authorised NordicWellness Australia sauna installation partner — delivering XL pod sauna installations in Coal Cliff, Oasis sauna fit-outs in Burraneer and Balmain, and premium sauna installations across the Eastern Suburbs, Mosman and Greater Sydney (NordicWellness Sydney). Every project is professionally managed by our team from first quote to final handover. We're fully licensed and insured under the NSW Home Building Act and operate to the NSW Building Code of Australia. Get a free quote: call 0432 826 086 or submit online. ABN: 58 303 616 851. Sydney homeowners trust BuiltByAJ for quality craftsmanship that lasts.