Sheds like this can go one of two ways. They can drift towards degradation, becoming grotty grime-holes that kids run past after dark, ruining the aesthetic of even the most lovingly crafted garden. Or, you can take things in hand and turn it into a designer den.

We know which option we like the sound of. Tempted to work some transformation magic and take your shed from drab to fab? These simple steps should help get you started, along with seven suggestions for how to use it...

Start with the basics

First things first - you need your shed to be structurally sound, and even relatively recent models often aren't. Replace any rotting boards, use wood filler to seal gaps in the walls or ceiling, and mend any really large cracks that can't be papered over.

Next get the place clean - and we're not talking about a 30 seconds of abject sweeping, we mean properly clean. You don't want to be painting over any spider's webs or lichen and you certainly don't want to conceal any rot, so a once-over with a fungicidal wash might be a worthwhile move too.

Perfect your paintwork

Now for the colour: Apply a layer of oil-based primer, and once it dries you're ready for your first layer of paint (always check products are suitable, and ask a specialist shop for advice if unsure). Paint pumps are much faster than brushes and power sprayers are faster still, but a simple roller will still be perfectly effective.

Remember to put down a tarpaulin to protect nearby areas (grass doesn't like paint much more than flooring), and cover hinges, handles and window frames with masking tape to stave off unwanted splash. Let it dry, repeat, and let dry again. Depending on your materials, a decent two-coat paint job should last up to five years.

Just like that, your shed has shifted from haunted shack to handsome beach hut.

Keep it cosy

Damp is the number one enemy of a shed-turned-living space, and its number one entry point is from the ground, so it may be time to surface your floor. We recommend vinyl sheeting - it's relatively cheap, insulating, easy to clean and fares well with heavy footfall. It can even do a creditable imitation of the hardwood floors so many homeowners crave. Most importantly, it's waterproof, and seasoned DIY-ers can install it by hand in a single sheet.

Unless your shed is for seasonal use only, you may need to insulate more than just your floor. Mineral wool; wood fibre; insulation board - you've got plenty of options, but it's advisable to get in a professional for a job like this.

Fixtures and fixings

Your shed is now fundamentally functional, but if you are really going to make the most of your new-found space, you'll probably want lights and a heater. Battery operated appliances do work well, but in the long run it may be more convenient to wire up a power supply. Of course, suitability and safety are paramount for anything like this - so call in the professionals before making elaborate plans, and make sure any electrical jobs are done by a qualified electrician.

Otherwise, experiment at your leisure: Deck out the front area as a makeshift patio, hang some fairy lights for extra cosiness. You could even look into adding solar panels to the roof to boost sustainability.

How to use it?

Your shed is your oyster - and pearls are in the making. When it comes to exactly what to do with your newly-spruced up shed, the options are almost endless, and though luxuries like a Jacuzzi might require a little extra elbow grease (and cash!), you can conquer some quite nifty designs with minimal extra effort. Check out these seven ideas for inspiration...

1. The home office

In the age of the internet, laptop and smartphones, more and more people are working from home - and it's hugely helpful to have somewhere specific to work, that's away from your TV/bed/toddler. You'll probably want to add Wi-Fi - and be sure that heater is working in winter - but many a good book has been written and small business begun from the 'office at the bottom of the garden'.

2. The 'pub' shed

This one's a lot easier than you'd think. Pick up a flat-pack table-top to serve as a bar, throw in a few stools, a dustbin and a cooler (an ice box would do) and technically you're done. From there, the devil is in the decor: Pin up some posters, chuck a few beer mats on the counter, line the back wall with empty bottles, erect a shelf for your spirits and another for your pint glasses. Before you know it, your mates will be round your backyard every night complaining that you don't have Sky Sports.

3. The play shed

Playroom or play-house, a little home of their own can keep the kids happy for hours. A cardboard box cooker (or commercially made plastic one) with dishes and utensils, a little table and chairs and they're set. You might like to help them make curtains for the window or decorate the walls. Maybe even throw in a couple of sleeping bags and let them camp out for the night.

4. The hobby house

Teenage son wants to play the drums? Partner sick of your model train set covering the sitting room floor? Sheds are the perfect place for housing hobbies the rest of family doesn't share. They may not contain a whole rock band of course, but it's certainly be better than having them in the kitchen.

5. The art studio

Sheds are particularly good at keeping mess away from your actual home, and allowing the creative process to go on unhindered at any time of day or night. Paint splashes, oozes of glue and a soft layer of wood shavings are much more acceptable in the shed than in the dining room, while paints or tools can be positioned permanently on the walls in perfectly easy reach.

6. The man cave

We're not sure why this a male thing particularly (women, quite fairly, might like some peace and quiet sometimes too), but the man-cave-shed is certainly a thing. A comfortable old sofa (if it can fit through the door; cushions and beanbags if it can't), a telly, games console and sound system are all simple plug-ins for the well-wired garden room, and roomier models might squeeze in a pool table as well.

7. The teen den

Rather than escaping to the shed yourself, why not hang onto the house and banish the kids instead? Much the same provision as the man-cave should keep them happy - if perhaps with a different set of tunes. The teens get a bit of privacy while you get a quieter life, while still knowing where they are. Win win.