if request.method == 'POST':
            HousePhotoAddFormSet = formset_factory(HousePhotoAddForm, max_num=10)  
            formset = HousePhotoAddFormSet(request.POST, request.FILES) 
            if formset.is_valid():
                try:
                    house = House.objects.get(code=id)
                except House.DoesNotExist: 
                    return HttpResponseRedirect("/add/2/%s/" %(id))
                for form in formset:
                    photo = HousePhoto(house=house, **form.cleaned_data)
                    photo.save()
                    return HttpResponseRedirect("/add/3/%s/" %(id))

class HousePhoto(models.Model):
    house = models.ForeignKey(House, related_name='HousePhotoToHouse', unique=False, verbose_name=u'Объявление')
    photo = models.ImageField(upload_to='photo')
    description = models.CharField(max_length=140, unique=False, verbose_name=u'Комментарий')
            
    class Meta:
        verbose_name = (u'---Фотография---')
        verbose_name_plural = (u'---Фотографии---')

class HousePhotoAddForm (forms.Form):
    photo = forms.ImageField()
    description = forms.CharField(max_length=140, widget=forms.Textarea(attrs={ 
                                                                               'class': 'photo_description', 
                                                                               'placeholder': u'Краткое описание'}))  

for form in formset:
    photo = HousePhoto(house=house, **form.cleaned_data)
    photo.save()
    return HttpResponseRedirect("/add/3/%s/" %(id)) # вот тут 

        if request.method == 'GET':
            data_dict = request.GET.dict()
            HousePhotoAddFormSet = formset_factory(HousePhotoAddForm, extra=data_dict['form-TOTAL_FORMS'], max_num=data_dict['form-TOTAL_FORMS'])  
            formset = HousePhotoAddFormSet(request.GET) 
            if formset.is_valid():
                try:
                    house = House.objects.get(code=id)
                except House.DoesNotExist: 
                    return HttpResponseRedirect("/add/2/%s/" %(id))
                for form in formset:
                    check = HousePhotoAddForm(form.cleaned_data)
                    if check.is_valid():
                        photo = HousePhoto(house=house, **form.cleaned_data)
                        photo.save()
                return HttpResponseRedirect("/add/3/%s/" %(id))
            else:
                return HttpResponseRedirect("/add/2/%s/" %(id))

if request.method == 'GET':
            data_dict = request.GET.dict()
            HousePhotoAddFormSet = formset_factory(HousePhotoAddForm, extra=data_dict['form-TOTAL_FORMS'], max_num=data_dict['form-TOTAL_FORMS'])  
            formset = HousePhotoAddFormSet(request.GET) 
            print formset.errors               #посмотри , что за ошибки
            print formset.non_form_errors()  # обе строки выводят одну инфу, просто по разному
            if formset.is_valid():

[{'photo': [u'Обязательное поле.']}]

GET Variables
Variable	Value
form-MAX_NUM_FORMS	
form-0-photo	9ВАРИАНТ.jpg
form-INITIAL_FORMS	0
form-0-description	fsddfs
form-TOTAL_FORMS	1

            data_dict = request.GET.dict()
            HousePhotoAddFormSet = formset_factory(HousePhotoAddForm, extra=data_dict['form-TOTAL_FORMS'], max_num=data_dict['form-TOTAL_FORMS'])  
            formset = HousePhotoAddFormSet(request.GET) 
            if formset.is_valid():
                try:
                    house = House.objects.get(code=id)
                except House.DoesNotExist: 
                    return HttpResponseRedirect("/add/2/%s/" %(id))
                for form in formset:
                    check = HousePhotoAddForm(form.cleaned_data)
                    if check.is_valid():
                        photo = HousePhoto(house=house, **form.cleaned_data)
                        photo.save()