Below you find information about house hunting options in Aarhus.

Housing Site
The International Centre has a Housing Site, where you can find or post advertisements for free if you are seeking accommodation or if you would like to sublet or let accommodation to staff, postdocs and/or PhD students at Aarhus University.

The Student Council at Aarhus University [Studenterrådet]
The Student Council is a student organisation with a housing website for students and staff. The housing website is in Danish, but you can find both English and Danish advertisements. Additionally, you can easily place your own advertisement under søger bolig - looking for accommodation.

BoligPortal
This is Denmark's largest housing portal where both private persons and some companies opt to advertise their rooms, apartments or houses for let or sublet. You can find information in Danish and English although many of the descriptions are in Danish. Although it is free to search amongst all the listings, it will cost you a fee to gain access to all the contact information of the various advertisers.

Lejebolig 
Lejebolig competes with BoligPortal and also have a wide selection of properties for rent. They have an English website where you can search for accommodation and buy a Seekers Package, in order to gain access to the contact information of landlords.

Facebook - Groups
If you are a member of the social networking site, Facebook, then the group called 'Lejligheder til salg og leje i Århus' (Apartments for sale and rent in Aarhus) could be useful as it has become a popular place for people to post a message about their available room or apartment or for housing seekers to post about their wishes for housing. 

Danske Udlejere
Danske Udlejere is an association for property owners in Denmark. They offer a free-to-use portal, 'Leje-portalen', where their property-owning members advertise their accommodation if they wish to rent it out. The website itself is only in Danish but it is relatively easy to navigate, if you were to use Google Translate.
 

*Note: Both BoligPortal and Lejebolig offer a digital housing agent service, respectively called "FindBolig e-mail"(only in Danish) or "Create Property Agent" (available in English as well).

When you sign-up for the service using your e-mail address, it allows you to define certain criteria for your search, such as location, price and number of rooms. After this you will receive daily e-mails with new listings that fit your criteria.

Do not pay rent and deposit to the landlord before having received a signed leasing contract. Your landlord could use this authorized version in Danish. The English version of the lease contract is not authorized but can be used as a translation of the authorized Danish contract. You can read more about lease contracts in Danish.

Aarhusbolig
This website is a cooperation between all social housing associations in Aarhus, who together have a large number of apartments (approx. 45,000 in total) at their disposal.

You need to sign-up, pay a fee of 100kr every year and select the apartments that you would like to apply for. You will then be placed on a waiting list for the residences you have selected.

Although there are long waiting lists (read about the cons below), there can occasionally be some apartments without any waiting times. These are normally advertised here. 

Via the following link, you can also find some apartments that allow you to get further ahead in the queue if you can fulfill certain criteria, such as couples without children, applicants above 55 without children living at home, etc. On the page you can see the different criteria for the different apartments.  

Pros
Housing via the social housing associations are some of the cheapest, if not the cheapest, types of housing you can get in Aarhus. This also makes it extremely sought after and leads to long waiting lists as explained below.

Cons
Unfortunately, the waiting lists can be extremely long (very often from 3-20 years), so this is not a good option if you are staying in Aarhus for a short while only. If you plan to stay for a long duration, you could sign up for a membership. 

Most private rental companies and housing administrators only have information provided on their website in Danish. You can easily use tools such as Google Translate to translate either sections of a website or the full site (in this case just copy the link of the website into the translation box and click on the link that is automatically generated).

B2 Holding
B2 Holding does not offer an overview of their available apartments but it is free to contact their housing administrators by phone or e-mail to inquire about any availabilities. They mostly have apartments in the Northern part of Aarhus, which is still quite close to Aarhus University. At an additional cost, they can also offer furnished accommodation.

Høgh & Rousing
Høgh & Rousing does not offer an overview of their available apartments but it is free to contact their housing administrator by phone or e-mail to inquire about any availabilities. They mostly have apartments in the city centre. At an additional cost, they call also offer furnished accommodation.

Henning Poulsen
Henning Poulsen does not provide an overview of the available apartments as they prefer to receive an application from you and then provide you with offers. It is free to do so and they have many apartments of varying sizes, prices and locations in Aarhus. Send an e-mail to them telling them more about yourself, your job, your wishes regarding size of the apartment, maximum rent, desired moving-in date, as well as any other needs you might have for accommodation.

Mogens de Linde
Mogens de Linde offer a free overview of the apartments they have available, as well as contact information under each listing. They primarily have apartments in the centre of Aarhus with a mixed price range.

Dueholm & Krøyer Ejendomsadministration
Dueholm & Krøyer Ejendomsadministration offer a free overview of the properties that they administer, which are located in Aarhus C and in the area just south of the centre. To apply for one of the apartments, send an e-mail including the following information: The apartment you are applying for, a description about yourself, your age, the number of persons, and your phone number (private/work).

Hestia Ejendomme
Hestia Ejendomme provides a free overview of all their available listings via the link on their site. There is also contact information you can use to contact them if you are interested in any of their listings. They have different sized apartments spread across the city, although all are within either Aarhus C (Centre) or Aarhus N (also very close to Aarhus University).

Juul Ejendomme
Juul Ejendomme provides a free overview of all their available listings and offers contact information for you to get in touch. When contacting them they require the following information: Name, phone number, number of persons, job, you desired moving-in date, as well as your estimated budget for housing. 

Dansk Administrations Center
Dansk Administrations Center's portal 'Lej-en-bolig.dk' is free to use and contact information is listed with each offer. Click on 'Østjylland'(East Jutland), on the right hand side, to view the current offers in Aarhus. There are often listings within the 5000-8000 DKK price range. 

SN Invest
SN Invest freely lists their available accommodation on their site as well as their contact information. They have apartments in varying sizes and prices mostly in the city centre but also slightly west of the centre.

Colliers Ejendomsadministration
Colliers freely lists their available accommodation on their site as well as their contact information. They have accommodation in both Aarhus C as well as Viby (just south of the city centre), which vary greatly in size and price.

EDC
EDC freely lists their available accommodation on their site as well as their contact information. 

DEAS
DEAS's portal 'Findbolig.nu' is free to use and offers a variety of housing both in the city centre as well as just outside. It is based on waiting lists, so you need to sign-up for their service, which is very quick to do, and apply for the listings which you like.

Essex
Essex freely list their accommodation on their site as well as their contact information. To see if there are any availabilities, check the links for each residence on the menu on the left. The ones located in Aarhus are marked Kappelvænget, Nordlandsvej, Essex Park Malmøgade, Skovvejen and Emiliedalen. 

Søgaard Ejendomme
Søgaard Ejendomme freely lists their accommodation on their site as well as their contact information. They generally have 2 to 3 room apartments in Aarhus C or Risskov/Skejby from around 7000 DKK per month and upwards.

NME Ejendomsadministration
NME Ejendomsadministration runs via an application system where you must fill out a form, after which they will contact you if they have something suitable. It is however free to apply. They have apartments of varying sizes in Aarhus C, N and S. 

Housing Denmark
Housing Denmark helps people let or sublet their residences and are especially used to helping expats find larger accommodation. The apartments and houses they have listed are typically above 8000 DKK per month. They have housing information in English and their housing database is free of charge for seekers to access.

More info

You can find more information about renting accommodiation on WorkInDenmark.