Start early and work room by room

Moving to a smaller home is exciting, but it comes with a hard truth: everything you own has to fit into less space. The good news is that decluttering before you pack saves money, time and a great deal of stress on moving day. Removals firms usually quote by volume or weight, so every box you don't move is money still in your pocket.

Begin eight to twelve weeks before your move date if you can. Rather than trying to tackle the whole house in one exhausting weekend, choose a single room and give yourself a realistic window — a bedroom in a week, the kitchen over two. Sessions of twenty to thirty minutes are far more effective than one long marathon. Start with easy wins such as the utility room or spare bedroom, and leave the loft and the family photographs until you have built up some momentum.

Use the five-pile rule in every room

Take a bin bag, a few cardboard boxes and some sticky labels into each room, and sort everything into five piles:

• Keep — things you have used in the past year and that have a clear home in the new property.
• Donate — good-quality items that a charity shop, school fete or community group could pass on.
• Sell — anything worth more than about £20 and in demand locally.
• Recycle or bin — broken, worn-out or unusable items.
• Decide later — a small box with a firm deadline written on it.

Be strict with the keep pile. Ask yourself whether the item earns the floor space it occupies, not whether it might be useful one day. Duplicates are the biggest culprit: three sets of measuring spoons, six spare phone chargers, a drawer of half-used candles. Keep the best one and let the rest go. The "decide later" box is a safety net, but seal it and write a date on the lid — if you have not opened it by then, it leaves the house unopened.

Room-by-room tactics that actually work

Every room has its own clutter traps, and knowing them makes the job quicker.

• Kitchen: clear mismatched plastic containers, chipped mugs, duplicate utensils and appliances you have used twice since Christmas. If you are downsizing to a smaller kitchen, you will have fewer cupboards, so be ruthless about gadgets.
• Wardrobes: turn every hanger backwards, then turn it forwards when you wear the item. After a season, anything still backwards is a candidate for donation. Take worn-out clothing to a textile bank rather than the bin.
• Living room: books, DVDs, cables and ornaments. Keep the books you will genuinely reread and pass on the rest to charity shops, which often welcome them.
• Loft, garage and shed: usually the hardest. Old paint tins, garden chemicals and broken tools cannot go in your wheelie bin — take them to your local household recycling centre. Bulky items the council will not collect can often be booked in as a bulky waste pickup for a small fee.
• Paperwork: shred old statements, but keep tax and financial records for at least six years, along with passports, birth certificates, warranties and instruction manuals for anything you are keeping.

Measure your new home before you pack

Before you decide what stays, get the floor plan or measurements of your new property. Note how many cupboards, wardrobes and shelves you will actually have — a smaller kitchen or a house without a loft can change everything. Then set a "space budget" for each room: two shelves for books, one drawer for paperwork, four boxes for seasonal decorations.

Apply the same logic to furniture. A sofa that dominated a large lounge may simply not fit through a narrower hallway or into a smaller sitting room. Measure doorways, stair turns and the rooms themselves. It is far cheaper to sell a bulky wardrobe locally than to pay a removals crew to carry it up a flight of stairs and then discover it will not go in.

Selling, donating and rehoming sensibly

Charity shops are delighted with clean, working, complete items, but ring ahead about furniture and electricals, as not every branch can accept them. Local free-to-collect groups, community noticeboards and church or school jumble sales are excellent for shifting things quickly without haggling.

If you sell online, bundle low-value items together and price to sell rather than to maximise. Remember that your time has value too: photographing, listing and answering messages takes hours. Set a cut-off date about two weeks before the move. Whatever has not sold or been collected by then goes to donation or the tip — do not let it follow you to the new house.

Make the final week calm and organised

Pack your keep pile room by room, labelling every box with both the room it came from and a short contents list. Prepare an "open first" box with kettle, mugs, toilet roll, bedding, phone chargers and a few basic tools, and keep it with you rather than on the van. Resist buying new storage containers until you have measured the new cupboards, or you will simply be moving empty boxes.

A lighter move costs less, unpacks faster and helps you settle into a smaller home with room to breathe. Sort one room at a time, trust your instincts on the first pass and give yourself permission to let go — the space you gain is worth far more than the things you leave behind.