I've had a look at free offerings for floor planning software. It depends on the level you want to go to. Sweethome3D http://www.sweethome3d.com/ is truly free because it's open source (no fees if you want to draw more than one plan etc). I've found I can get reasonably detailed with it from layout perspective but I doubt it would be good enough for a drawings for a building permit (although I'm not certain of this). As a graphic designer you'll have an affinity for graphics software. If you want to be able to draw more detailed drawings Id take the time to learn Sketchup. I know some architects use this as their software of choice. I'm definitely with you @Jason Carter - the only way to really control your budget is to plan ahead and choose and price everything that you can think of before you break ground. Otherwise you're in a situation where you have to make quick compromises during the build which leads to mistakes etc. In my work we use requirements tracking tools. I think it would be really helpful to communicate to the contractors exactly what is going to go on in the room - why the extra outlets are there and in the position they're in. That way they have a deeper understanding of why the specs are the way they are and they don't make decisions that detract from the design - they might even come up with suggestions that support the ideas behind the designs.

Hi Michele, self build is very exciting and we wish you luck for your upcoming project. We have various tips when it comes to our customers designing their home. As some have suggested above understanding how you and your family occupy the space is fundamental in making those early design decisions. We also tell self builders to put 'wants and needs' into 3 columns, must have, nice to have and luxury. This helps define budget and start with the fundamentals before progressing to those items such as cinema rooms or a top end kitchen worktop. There are many helpful tips on our Self Build Academy website also plenty of design and interior inspiration at Potton Self Build Galleries Before you decide that building your home is right for you, ask yourself four questions; Do you have the time and commitment to see your project through to the end. Do you have the skills and knowledge required for the task ahead Do you understand the cost involved and do you have enough money to complete the build Do you have a constitution strong enough to see you through both the highs and lows of building your own home Provided you understand your answers to these questions and can ‘fill the gaps’ when it comes to skills, knowledge, time and funding, then press ahead and enjoy what is probably going to be one of the most rewarding experiences that you will ever have in your lifetime!

I like the idea with the pink highlighted edge. This opens u the kitchen dining space but keeps the lounge and study separate as you wanted. I would add bifold doors if possible along the back wall of the dining room to make it feel even bigger. Hope this helps

3d shot