1840 Real Estate

Our customer service awards

See what RateMyAgent awards 1840 Real Estate has won

State Top 10South Australia
City Top 5Adelaide

8x State Top 10South Australia - 2026, 2025, 2024, 2023, 2022, 2021, 2020, 2019
7x City Top 5Adelaide - 2026, 2025, 2024, 2023, 2022, 2021, 2020
4x National Top 100Australia - 2023, 2022, 2021, 2020
3x Suburb WinnerMarden - 2023, 2021, 2020

Meet the team

Get to know the 2 property managers at 1840 Real Estate.

Karl Niehus

Director

karl@1840.com.au

About Karl

Having a vast amount of knowledge in the finance and property arena, gives Karl an enormous advantage to all his clients. His background consists of 8 years of sales and 8 years within the finance industry, with a strong focus on property. Including seminar participation & educating investors on different investment strategies including positive and negative gearing. His passion is ‘putting the right people in the right property’ whether it is for their personal reasons or an excellent investment opportunity. Karl has formal qualifications in Sales & Marketing & Property Services, which gives him a tremendous edge over any of his competing agents. Unlike a property agent who is a 'part-timer', Karl has made a career from helping his clients buy &/or sell property in Adelaide.

Celeste Dean

Property Manager

celeste@1840.com.au

About Celeste

Celeste was born in Victor Harbor but spent most of her young adult life in Townsville North Queensland where she worked as a PA in a Real Estate Company in the City. Upon her return to Adelaide she worked as an Office Manager for a local wholesale distribution company until starting her young family. She has always had a sincere love of property and really enjoyed her time working as a PA in Queensland, which has driven her to join Karl in the launch of 1840 Real Estate. Celeste is a fully qualified Real Estate Sales professional and also manages the Property Management division. Celeste prides herself on an extremely high level of customer service, it’s what sets her apart, being highly recognised for this throughout her career, Celeste understands that service levels are paramount in a successful business. Celeste has a ‘can do’ attitude with mindset to exceed the client’s expectations.

About us

1840 Real Estate is Adelaide’s latest boutique agency specialising in Residential Property. Founder and Director Karl Niehus’ family arrived in Adelaide in 1840, Karl was born at the (formerly) Queen Victoria Hospital on Fullarton Road, Rose Park. Having grown up in Adelaide, he has watched the city expand significantly over the years. He began working in sales over 16 years ago, and about 4 years ago he decided to put his extensive experience to use in the Real Estate industry with much success. During this time, he has sold millions of dollars worth of Real Estate hitting record price, after record price in Marden and other suburbs around Adelaide. The time came to go out on his own with the goal of providing a personally specialised service for each client, something he was unable to offer while under a corporate banner. 1840 Real Estate is a family owned and operated business, ensuring we remain highly motivated by customer satisfaction. Each member of our team specialises in their area of expertise allowing 1840 to offer a full range of services (Sales and Property Management) we also work closely with our Mortgage Advisor, New House Home Loans who have been established for over 9 years (Finance Brokers with access to 30+ banking institutions).

Landlord review

10 days ago

very professional and pleasant to deal with

I dealt with celeste at the agency Who was very knowledgeable and professional and help me in renting my house

1840 Real Estate

4.9

(59 reviews)

Landlord review

2 months ago

Excellent service

Excellent service received from both Karl and Celeste, who are a pleasure to deal with: very professional, great knowledge of the market, efficient, excellent prompt communication, attention to details. I would highly recommend them to anyone who is looking for a property manager

1840 Real Estate

4.9

(59 reviews)

Landlord review

3 months ago

Ambitious, yet calculated

They communicated positively and made it clear what the aim was. They replied to all messages almost instantly. They showed that they have a thorough knowledge of the market. They strategically tested the absolute max and pulled back to the best amount with immaculate timing. Yet another of many fantastic professional experiences for us! Yes, the market is strong in our suburb for rental, but we felt like we came out with a big win getting the same or better results than other similar investors. Top job!

1840 Real Estate

4.9

(59 reviews)

Landlord review

3 months ago

The whole 1840 team are simply amazing.

To the entire team at 1840 Realestate in particular KARL & CELESTE, we want to say a massive thank you for all your blood sweat & tears to do with a purchase of a property & finding a tenant for us. We asked for your opinions/thoughts & knowledge on numerous occasions whilst we were only looking, you returned all of our texts, emails and calls even on a Sunday wow! Your strong work ethics is why we have every faith of you all working on our behalf due to your professionalism. In closing we can’t recommend 1840 enough for all their work, they go above and beyond. Thank you Jim & Tina. :)

1840 Real Estate

4.9

(59 reviews)

Landlord review

4 months ago

Excellent Service, Zero Stress

The team at 1840 Real Estate take all the stress out of rental management whilst continuing to provide professional service.

1840 Real Estate

4.9

(59 reviews)

Landlord review

7 months ago

Excellent people to work with.

Celeste and Karl are absolutely fantastic real estate agents! One of the things I loved most was that 1840 Real Estate is a smaller company, which means their service feels incredibly personal, attentive, and truly genuine. They went above-and-beyond in finding the right tenant for my property, and their care and communication were outstanding. After dealing with larger real estate companies in the past — where it often felt like they were focused on themselves rather than working with me — this experience was a breath of fresh air. I can’t recommend 1840 Real Estate highly enough. They’re exceptional!

1840 Real Estate

4.9

(59 reviews)

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