http://www.cafeastrology.com/articles/neptuneinhouses.htmlNeptune in the Houses of the Natal ChartNeptune's position by house in the natal chart (that is, the house that Neptune occupies in the birth chart) reveals an area of life where we tend to ignore or avoid reality. We attach spirituality to the areas of life ruled by the house. Often, we chase dreams and illusions in these areas of life.
When trying to understand some of the effects of Neptune on the affairs of the house that Neptune occupies, it is helpful to think of the following example: if two people have decided to split the cost of an item, and that item is five dollars, what would they do if nobody had any coins? The Neptune person would insist on paying three dollars, and let the other person pay only two; and the Neptune person would insist that the other individual never pay him back. This is a simplistic example, but it is illustrative of the character of Neptune. Wherever Neptune is in your chart, that is where you cut others a better deal than you do yourself. This, obviously, doesn't always have to do with material goods. You cut others slack, often at the your expense, in this area of life; you are trusting and idealistic.
So, if Neptune is in the 6th house, the native may easily gloss over the details of managing day-to-day affairs. Perhaps the person has adopted a philosophy that life means more than just sticking to routines, making lists, and organizing bills to pay. Another real-world manifestation of this position is the tendency to give in to co-workers, or to not take credit for one's own hard work.
Or, if Neptune occupies the 8th house, then money and business affairs involving others are literally involved. If a more aggressive personality seems to want something more, the native will simply cut them a better deal.
Similarly, if Neptune is in the 7th house, the native may tend to give more to a partnership (including marriage) than he/she takes. There may be a tendency to wear rose colored glasses when it comes to the selection of a partner, in an attempt to find a "soulmate". The native must take a step back, consciously attempting to see their partners and relationships for what they are, rather than what they wish them to be.
The following interpretations come from the Kepler program:
Neptune in 1st House
You are yielding, gentle, and impressionable. You tend to "melt" into your surroundings, and do not make a very powerful, vivid impression on others. Especially while young, you may not have a very clear sense of identity.
Sensitive and compassionate, you do not enjoy fighting and no matter what you profess, you are a pacifist at heart.
Neptune in 2nd house
You may have a great deal of confusion over money, financial matters, and ownership. Perhaps these things mean very little to you. Or possibly you simply don't know how to deal with them in a realistic, effective way.
Also, you may make your living through artistic, musical, or highly imaginative endeavors.
Neptune in 3rd House
Daydreaming, lack of concentration, and inattention to your surroundings can be problems for you. Your mind tends to wander unless you are using it in an imaginative, creative way. Dry facts and cold logic hold no appeal for you, and unless a subject has a colorful or personally inspiring element, you won't stick with it for long. You have a sensitive, intuitive bent.
Neptune in 4th House
Your childhood and early home life were colored by a great deal of confusion or by people with unusually active imaginations, aspirations, or fantasies. It is difficult for you to see your childhood and your relationship with your parents in a clear, realistic light. You may search for the ideal, loving home you wish you had, or believe you had, when you were a child. Finding inner peace and a sense of emotional security within yourself is important to you.
Neptune in 5th House
Your creative self-expression has a very imaginative quality, and you have a particular affinity for drama, theater, film, and other artistic mediums in which creative fantasy plays a major role.
In love and romance, also, you often have glamorous fantasies that have little to do with reality.
Neptune in 6th House
You have a sensitive physique and may have allergic responses and sensitivities to foods, medicines, or anything you take in from the environment. Emotional stress and confusion seem to affect you physically, even more quickly than they affect other people.
Neptune in 7th House
You often have very naive, idealistic, or overly romantic attitudes toward people, and it's difficult for you to see others realistically. You may prefer to keep your relationships on an idealistic or platonic level, so that you don't have to deal with the more prosaic, earthy, human aspects of relating.
Thoroughly investigate potential marriage or business partners, as your gullibility and desire to see only the best in people may blind you to the truth about others with whom you form a close alliance.
Neptune in 8th House
You have a very active imagination and powerful fantasies. You may develop an interest in the supernatural, psychic phenomena, or occult subjects. You may have strange fantasies and/or nebulous fears of "ghosts", "the astral plane", or death. It's better for you not to dabble in such areas unless you are thoroughly grounded in the practical world as well.
Neptune in 9th House
You love to dream, fantasize, and speculate. You are willing to entertain the most far fetched ideas and philosophies, since to you anything is possible.
Anything exotic, alien, or faraway holds a great attraction for you. You can have very otherworldly beliefs which are quite impractical and irrelevant to your everyday existence.
Neptune in 10th House
You are a very idealistic person, and you want to see your ideals, hopes, and dreams made concrete and real in the everyday world. You are driven to put your ideals into action.
When young you may be rather aimless or confused about your place in the world. In early adult life it is likely that you struggle to find ways to express your imagination, fantasies, and ideals in your career. Work that involves compassionate service (such as medicine or the ministry) may be your calling. If you lack personal integrity and honesty, you quickly go to the opposite extreme and you can con others through dishonesty and trickery. Music, art, film-making or entertainment are also areas in which you are well-suited.
Neptune in 11th House
You are idealistic in your social and political outlook, and your ideals may impel you to join clubs, organizations, communities of like-minded people, or groups that share your vision and your concerns.
Neptune in 12th House
Compassionate and extremely sensitive to the emotional tones in the atmosphere surrounding you, you are naturally "psychic" or able to sense and understand much about a person without talking to them or knowing them consciously at all. You are deeply interested in the hidden realms of life and the afterlife. Your powerful sensitivity may also remain latent or repressed through much of your life and then be fully awakened in adulthood.