Specialist Property Development Lawyers

At Thornton + King, we act for developers, investors, landowners, and consultants on many aspects of property development law in NSW. From site acquisition lot sales, our experienced lawyers provide clear, commercially focused advice that keeps your development moving.

Whether you're undertaking a boutique dual occupancy or a multi-stage mixed-use project, we’re here to help you minimise risk, protect your investment, and meet your commercial goals.


Our Property Development Services

Our specialist property lawyers can help you with:

Site Acquisition & Due Diligence

  • Contract negotiation and review

  • Option agreements, put and call options

  • Planning and zoning due diligence

  • Title, easement, and contamination checks

Off-the-Plan Sales & Lot Subdivision

  • Preparing off-the-plan sale contracts

  • Lodging plans of subdivision, easements, and by-laws

  • Vendor disclosure compliance under NSW legislation

  • Conveyancing and settlements at scale

Why Choose Thornton + King?

  • We’re specialist property development lawyers

  • We have a deep understanding of the development processes and the commercial realities of building projects.

  • We make the law simple with practical, no-nonsense legal guidance.

  • We regularly act for both first-time developers and seasoned professionals across Sydney.

Types of Projects We Advise On

  • Residential and mixed-use developments

  • Townhouse and dual occupancy projects

  • Land subdivisions and strata developments

  • Commercial, industrial and retail developments


Common Legal Issues in Property Development

Can I use an option agreement to secure a site?

Yes, we can help draft and negotiate option deeds that give you flexibility to secure and conduct due diligence on a site before committing to purchase.

What are the legal risks in off-the-plan sales?

There are countless risks - disclosure, sunset dates, and contract variations must be carefully managed to avoid disputes or buyers rescinding contracts.

Speak to Our Sydney Property Development Lawyers

Our team includes multiple Law Society Accredited Specialists in Property Law. To speak to an experienced property lawyer about your property development project, give us a call or submit an enquiry now.

Specialist Property Development Lawyers

Contact Thornton & King Lawyers

Do you have a question about our services? Contact us today, and a member of our team will get back to you soon.

What our customers say

⭐️⭐️⭐️⭐️⭐️ I cannot thank Sarah Newman, and Andy, at Thornton and King enough for their incredible support over the past six months. The settlement of my property was long, drawn-out, and at times quite tedious—but throughout the entire process, they were consistently professional, prompt, and reassuring. Sarah and Andy were always available to answer my questions, explain things...

Shelley Robertson

a week ago

We had the pleasure of working with Andy and Alan, and they were absolutely amazing. Their knowledge and expertise were invaluable as they guided us through the process of purchasing our first property in Queensland. They went above and beyond to assist us and were always available to answer the many questions we had as first-time buyers. We highly recommend Thornton & King and ...

Paris Dzuheric

5 months ago

Thornton+King handled the recent sale of my apartment with great professionalism and efficiency. Communication was good, clear. and concise throughout. I'd like to give a special shout out of thanks to Andy Habib for ensuring everything ran as smoothly as it did.

Suzi Cottrell

2 months ago

Excellent service from the whole team at Thornton + King - they did the legal work for my sale and subsequent purchase in a very professional, courteous manner. Would definitely use them again.

Margot Saville

a week ago

We have now bought and sold multiple times with support from Thornton + King. They are always incredibly efficient, helpful and proactive.

Niccola Phillips

3 weeks ago

Andy was fantastic with our families recent property purchases. We had a longer wait to settle but Andy kept us updated on the status and next steps. As with property purchases the stress levels are high but Andy was calm and reassuring and made the process as seamless as possible. Would recommend Andy and Alan for your next property purchase.

Kylie Bone

7 months ago

Highly recommended. The team at Thornton + King was very responsive, very knowledgeable and professional. We felt extremely supported and at ease throughout the sale of our IP. Definitely engaging with the firm again for our next property acquisition/sale.

Jerry L

10 months ago