diff --git a/flatisfy/models/flat.py b/flatisfy/models/flat.py
index 733791c..d683429 100644
--- a/flatisfy/models/flat.py
+++ b/flatisfy/models/flat.py
@@ -13,6 +13,7 @@ import arrow
 from sqlalchemy import (
     Column, DateTime, Enum, Float, SmallInteger, String, Text
 )
+from sqlalchemy.orm import validates
 
 from flatisfy.database.base import BASE
 from flatisfy.database.types import MagicJSON
@@ -96,6 +97,62 @@ class Flat(BASE):
     # Date for visit
     visit_date = Column(DateTime)
 
+    @validates('utilities')
+    def validate_utilities(self, _, utilities):
+        """
+        Utilities validation method
+        """
+        if isinstance(utilities, FlatUtilities):
+            return utilities
+
+        if utilities == "C.C.":
+            return FlatUtilities.included
+        elif utilities == "H.C.":
+            return FlatUtilities.excluded
+        else:
+            return FlatUtilities.unknown
+
+    @validates("status")
+    def validate_status(self, _, status):
+        """
+        Status validation method
+        """
+        if isinstance(status, FlatStatus):
+            return status
+
+        try:
+            return getattr(FlatStatus, status)
+        except (AttributeError, TypeError):
+            LOGGER.warn("Unkown flat status %s, ignoring it.",
+                        status)
+            return self.status.default.arg
+
+    @validates("notation")
+    def validate_status(self, _, notation):
+        """
+        Notation validation method
+        """
+        try:
+            notation = int(notation)
+            assert notation >= 0 and notation <= 5
+        except (ValueError, AssertionError):
+            raise ValueError('notation should be an integer between 0 and 5')
+        return notation
+
+    @validates("date")
+    def validate_date(self, _, date):
+        """
+        Date validation method
+        """
+        return arrow.get(date).naive
+
+    @validates("visit_date")
+    def validate_visit_date(self, _, visit_date):
+        """
+        Visit date validation method
+        """
+        return arrow.get(visit_date).naive
+
     @staticmethod
     def from_dict(flat_dict):
         """
@@ -119,29 +176,6 @@ class Flat(BASE):
             )
             del flat_dict["flatisfy"]
 
-        # Handle utilities field
-        if not isinstance(flat_dict["utilities"], FlatUtilities):
-            if flat_dict["utilities"] == "C.C.":
-                flat_dict["utilities"] = FlatUtilities.included
-            elif flat_dict["utilities"] == "H.C.":
-                flat_dict["utilities"] = FlatUtilities.excluded
-            else:
-                flat_dict["utilities"] = FlatUtilities.unknown
-
-        # Handle status field
-        flat_status = flat_dict.get("status", "new")
-        if not isinstance(flat_status, FlatStatus):
-            try:
-                flat_dict["status"] = getattr(FlatStatus, flat_status)
-            except AttributeError:
-                if "status" in flat_dict:
-                    del flat_dict["status"]
-                LOGGER.warn("Unkown flat status %s, ignoring it.",
-                            flat_status)
-
-        # Handle date field
-        flat_dict["date"] = arrow.get(flat_dict["date"]).naive
-
         flat_object = Flat()
         # Using a __dict__.update() call to make it work even if there are
         # extra keys in flat_dict which are not valid kwargs for Flat model.
@@ -151,7 +185,6 @@ class Flat(BASE):
     def __repr__(self):
         return "<Flat(id=%s, urls=%s)>" % (self.id, self.urls)
 
-
     def json_api_repr(self):
         """
         Return a dict representation of this flat object that is JSON
diff --git a/flatisfy/web/app.py b/flatisfy/web/app.py
index 2915e74..545a32c 100644
--- a/flatisfy/web/app.py
+++ b/flatisfy/web/app.py
@@ -73,20 +73,11 @@ def get_app(config):
               api_routes.time_to_places_v1)
 
     app.route("/api/v1/flats", "GET", api_routes.flats_v1)
-    app.route("/api/v1/flats/status/:status", "GET",
-              api_routes.flats_by_status_v1)
+    app.route("/api/v1/flats/:flat_id", "GET", api_routes.flat_v1)
+    app.route("/api/v1/flats/:flat_id", "PATCH",
+              api_routes.update_flat_v1)
 
-    app.route("/api/v1/flat/:flat_id", "GET", api_routes.flat_v1)
-    app.route("/api/v1/flat/:flat_id/status", "POST",
-              api_routes.update_flat_status_v1)
-    app.route("/api/v1/flat/:flat_id/notes", "POST",
-              api_routes.update_flat_notes_v1)
-    app.route("/api/v1/flat/:flat_id/notation", "POST",
-              api_routes.update_flat_notation_v1)
-    app.route("/api/v1/flat/:flat_id/visit_date", "POST",
-              api_routes.update_flat_visit_date_v1)
-
-    app.route("/api/v1/visits.ics", "GET",
+    app.route("/api/v1/ics/visits.ics", "GET",
               api_routes.ics_feed_v1)
 
     app.route("/api/v1/search", "POST", api_routes.search_v1)
diff --git a/flatisfy/web/js_src/api/index.js b/flatisfy/web/js_src/api/index.js
index 27fca9d..59be30e 100644
--- a/flatisfy/web/js_src/api/index.js
+++ b/flatisfy/web/js_src/api/index.js
@@ -46,7 +46,7 @@ export const getFlats = function (callback) {
 
 export const getFlat = function (flatId, callback) {
     fetch(
-        '/api/v1/flat/' + encodeURIComponent(flatId),
+        '/api/v1/flats/' + encodeURIComponent(flatId),
         { credentials: 'same-origin' }
     )
     .then(function (response) {
@@ -61,10 +61,10 @@ export const getFlat = function (flatId, callback) {
 
 export const updateFlatStatus = function (flatId, newStatus, callback) {
     fetch(
-        '/api/v1/flat/' + encodeURIComponent(flatId) + '/status',
+        '/api/v1/flats/' + encodeURIComponent(flatId),
         {
             credentials: 'same-origin',
-            method: 'POST',
+            method: 'PATCH',
             headers: {
                 'Content-Type': 'application/json'
             },
@@ -79,10 +79,10 @@ export const updateFlatStatus = function (flatId, newStatus, callback) {
 
 export const updateFlatNotes = function (flatId, newNotes, callback) {
     fetch(
-        '/api/v1/flat/' + encodeURIComponent(flatId) + '/notes',
+        '/api/v1/flats/' + encodeURIComponent(flatId),
         {
             credentials: 'same-origin',
-            method: 'POST',
+            method: 'PATCH',
             headers: {
                 'Content-Type': 'application/json'
             },
@@ -97,10 +97,10 @@ export const updateFlatNotes = function (flatId, newNotes, callback) {
 
 export const updateFlatNotation = function (flatId, newNotation, callback) {
     fetch(
-        '/api/v1/flat/' + encodeURIComponent(flatId) + '/notation',
+        '/api/v1/flats/' + encodeURIComponent(flatId),
         {
             credentials: 'same-origin',
-            method: 'POST',
+            method: 'PATCH',
             headers: {
                 'Content-Type': 'application/json'
             },
@@ -115,10 +115,10 @@ export const updateFlatNotation = function (flatId, newNotation, callback) {
 
 export const updateFlatVisitDate = function (flatId, newVisitDate, callback) {
     fetch(
-        '/api/v1/flat/' + encodeURIComponent(flatId) + '/visit_date',
+        '/api/v1/flats/' + encodeURIComponent(flatId),
         {
             credentials: 'same-origin',
-            method: 'POST',
+            method: 'PATCH',
             headers: {
                 'Content-Type': 'application/json'
             },
diff --git a/flatisfy/web/routes/api.py b/flatisfy/web/routes/api.py
index e211b44..8d9a45a 100644
--- a/flatisfy/web/routes/api.py
+++ b/flatisfy/web/routes/api.py
@@ -8,8 +8,8 @@ from __future__ import (
 
 import datetime
 import json
+import re
 
-import arrow
 import bottle
 import vobject
 
@@ -18,6 +18,12 @@ from flatisfy.models import flat as flat_model
 from flatisfy.models.postal_code import PostalCode
 
 
+def JSONError(error_code, error_str):
+    bottle.response.status = error_code
+    bottle.response.content_type = "application/json"
+    return json.dumps(dict(error=error_str, status_code=error_code))
+
+
 def _serialize_flat(flat, config):
     """
     Serialize a flat for JSON API.
@@ -65,7 +71,8 @@ def index_v1():
         "flats": "/api/v1/flats",
         "flat": "/api/v1/flat/:id",
         "search": "/api/v1/search",
-        "time_to_places": "/api/v1/time_to/places"
+        "ics": "/api/v1/ics/visits.ics",
+        "time_to_places": "/api/v1/time_to_places"
     }
 
 
@@ -75,57 +82,43 @@ def flats_v1(config, db):
 
         GET /api/v1/flats
 
+    .. note:: Filtering can be done through the ``filter`` GET param, according
+    to JSON API spec (http://jsonapi.org/recommendations/#filtering).
+
     :return: The available flats objects in a JSON ``data`` dict.
     """
     try:
+        db_query = db.query(flat_model.Flat)
+
+        # Handle filtering according to JSON API spec
+        FILTER_RE = re.compile(r"filter\[([A-z0-9_]+)\]")
+        filters = {}
+        for param in bottle.request.query:
+            filter_match = FILTER_RE.match(param)
+            if not filter:
+                continue
+            field = filter_match.group(1)
+            value = bottle.request.query[filter_match.group(0)]
+            filters[field] = value
+        db_query = db_query.filter_by(**filters)
+
+        # Build flat list
         flats = [
             _serialize_flat(flat, config)
-            for flat in db.query(flat_model.Flat).all()
+            for flat in db_query
         ]
-
         return {
             "data": flats
         }
-    except Exception as e:
-        return {
-            "error": str(e)
-        }
-
-
-def flats_by_status_v1(status, config, db):
-    """
-    API v1 flats route with a specific status:
-
-        GET /api/v1/flats/status/:status
-
-    :return: The matching flats objects in a JSON ``data`` dict.
-    """
-    try:
-        flats = [
-            _serialize_flat(flat, config)
-            for flat in (
-                db.query(flat_model.Flat)
-                .filter_by(status=getattr(flat_model.FlatStatus, status))
-                .all()
-            )
-        ]
-
-        return {
-            "data": flats
-        }
-    except AttributeError:
-        return bottle.HTTPError(400, "Invalid status provided.")
-    except Exception as e:
-        return {
-            "error": str(e)
-        }
+    except Exception as exc:
+        return JSONError(500, str(exc))
 
 
 def flat_v1(flat_id, config, db):
     """
     API v1 flat route:
 
-        GET /api/v1/flat/:flat_id
+        GET /api/v1/flats/:flat_id
 
     :return: The flat object in a JSON ``data`` dict.
     """
@@ -133,141 +126,50 @@ def flat_v1(flat_id, config, db):
         flat = db.query(flat_model.Flat).filter_by(id=flat_id).first()
 
         if not flat:
-            return bottle.HTTPError(404, "No flat with id {}.".format(flat_id))
+            return JSONError(404, "No flat with id {}.".format(flat_id))
 
         return {
             "data": _serialize_flat(flat, config)
         }
-    except Exception as e:
-        return {
-            "error": str(e)
-        }
+    except Exception as exc:
+        return JSONError(500, str(exc))
 
 
-def update_flat_status_v1(flat_id, config, db):
+def update_flat_v1(flat_id, config, db):
     """
     API v1 route to update flat status:
 
-        POST /api/v1/flat/:flat_id/status
-        Data: {
-            "status": "NEW_STATUS"
-        }
-
-    :return: The new flat object in a JSON ``data`` dict.
-    """
-    try:
-        flat = db.query(flat_model.Flat).filter_by(id=flat_id).first()
-        if not flat:
-            return bottle.HTTPError(404, "No flat with id {}.".format(flat_id))
-
-        try:
-            flat.status = getattr(
-                flat_model.FlatStatus, json.load(bottle.request.body)["status"]
-            )
-        except (AttributeError, ValueError, KeyError):
-            return bottle.HTTPError(400, "Invalid status provided.")
-
-        return {
-            "data": _serialize_flat(flat, config)
-        }
-    except Exception as e:
-        return {
-            "error": str(e)
-        }
-
-
-def update_flat_notes_v1(flat_id, config, db):
-    """
-    API v1 route to update flat notes:
-
-        POST /api/v1/flat/:flat_id/notes
-        Data: {
-            "notes": "NEW_NOTES"
-        }
-
-    :return: The new flat object in a JSON ``data`` dict.
-    """
-    try:
-        flat = db.query(flat_model.Flat).filter_by(id=flat_id).first()
-        if not flat:
-            return bottle.HTTPError(404, "No flat with id {}.".format(flat_id))
-
-        try:
-            flat.notes = json.load(bottle.request.body)["notes"]
-        except (ValueError, KeyError):
-            return bottle.HTTPError(400, "Invalid notes provided.")
-
-        return {
-            "data": _serialize_flat(flat, config)
-        }
-    except Exception as e:
-        return {
-            "error": str(e)
-        }
-
-
-def update_flat_notation_v1(flat_id, config, db):
-    """
-    API v1 route to update flat notation:
-
-        POST /api/v1/flat/:flat_id/notation
-        Data: {
-            "notation": "NEW_NOTATION"
-        }
-
-    :return: The new flat object in a JSON ``data`` dict.
-    """
-    try:
-        flat = db.query(flat_model.Flat).filter_by(id=flat_id).first()
-        if not flat:
-            return bottle.HTTPError(404, "No flat with id {}.".format(flat_id))
-
-        try:
-            flat.notation = json.load(bottle.request.body)["notation"]
-            assert flat.notation >= 0 and flat.notation <= 5
-        except (AssertionError, ValueError, KeyError):
-            return bottle.HTTPError(400, "Invalid notation provided.")
-
-        return {
-            "data": _serialize_flat(flat, config)
-        }
-    except Exception as e:
-        return {
-            "error": str(e)
-        }
-
-
-def update_flat_visit_date_v1(flat_id, config, db):
-    """
-    API v1 route to update flat date of visit:
-
-        POST /api/v1/flat/:flat_id/visit_date
+        PATCH /api/v1/flat/:flat_id
         Data: {
+            "status": "NEW_STATUS",
             "visit_date": "ISO8601 DATETIME"
         }
 
+    .. note:: The keys in the data sent are same keys as in ``Flat`` model. You
+    can provide any subset of them to update part of the flat infos.
+
     :return: The new flat object in a JSON ``data`` dict.
     """
     try:
         flat = db.query(flat_model.Flat).filter_by(id=flat_id).first()
         if not flat:
-            return bottle.HTTPError(404, "No flat with id {}.".format(flat_id))
+            return JSONError(404, "No flat with id {}.".format(flat_id))
 
         try:
-            visit_date = json.load(bottle.request.body)["visit_date"]
-            if visit_date:
-                visit_date = arrow.get(visit_date).naive
-            flat.visit_date = visit_date
-        except (arrow.parser.ParserError, ValueError, KeyError):
-            return bottle.HTTPError(400, "Invalid visit date provided.")
+            json_body = json.load(bottle.request.body)
+            for k, v in json_body.items():
+                setattr(flat, k, v)
+        except ValueError as exc:
+            return JSONError(
+                400,
+                "Invalid payload provided: {}.".format(str(exc))
+            )
 
         return {
             "data": _serialize_flat(flat, config)
         }
-    except Exception as e:
-        return {
-            "error": str(e)
-        }
+    except Exception as exc:
+        return JSONError(500, str(exc))
 
 
 def time_to_places_v1(config):
@@ -289,10 +191,8 @@ def time_to_places_v1(config):
         return {
             "data": places
         }
-    except Exception as e:
-        return {
-            "error": str(e)
-        }
+    except Exception as exc:
+        return JSONError(500, str(exc))
 
 
 def search_v1(db, config):
@@ -310,7 +210,7 @@ def search_v1(db, config):
         try:
             query = json.load(bottle.request.body)["query"]
         except (ValueError, KeyError):
-            return bottle.HTTPError(400, "Invalid query provided.")
+            return JSONError(400, "Invalid query provided.")
 
         flats_db_query = flat_model.Flat.search_query(db, query)
         flats = [
@@ -321,26 +221,24 @@ def search_v1(db, config):
         return {
             "data": flats
         }
-    except Exception as e:
-        return {
-            "error": str(e)
-        }
+    except Exception as exc:
+        return JSONError(500, str(exc))
 
 
 def ics_feed_v1(config, db):
     """
     API v1 ICS feed of visits route:
 
-        GET /api/v1/visits.ics
+        GET /api/v1/ics/visits.ics
 
     :return: The ICS feed for the visits.
     """
+    cal = vobject.iCalendar()
     try:
         flats_with_visits = db.query(flat_model.Flat).filter(
             flat_model.Flat.visit_date.isnot(None)
-        ).all()
+        )
 
-        cal = vobject.iCalendar()
         for flat in flats_with_visits:
             vevent = cal.add('vevent')
             vevent.add('dtstart').value = flat.visit_date
@@ -360,7 +258,7 @@ def ics_feed_v1(config, db):
                 description += '\n{}\n'.format(flat.notes)
 
             vevent.add('description').value = description
-
-        return cal.serialize()
     except:
-        return ''
+        pass
+
+    return cal.serialize()