Once Upon a Castle

Once Upon a Castle

Castle Diaries ⚑

There Is No Big Reveal for a Septic Tank

We spent most of this year’s renovation budget on things nobody will ever see. Here’s where it all went.

Kamille Longstreet's avatar
Kamille Longstreet
Oct 13, 2026
∙ Paid

On Saturday I sat down at the kitchen table to pay the taxe foncière on the château for the first time.

The taxe foncière is the French property tax. It arrives every autumn, right around the time the leaves start falling, as if France has decided the mood is already a little melancholy, so why not. Ours came to nearly €5,000. I paid it, closed the laptop, and sat there for a minute with a feeling I’ve been circling for a few weeks now.

We have spent a lot of money this year, and I can’t really see any of it.

I’m aware that “my château pool is behind schedule” is not a sentence that earns a lot of sympathy, and I’m not asking for any. But if you’ve ever spent your savings on a new roof, or a water heater, or the sewer line under the front yard, instead of on the vacation you’d been planning, or on a beautiful bedroom makeover, you already know exactly the feeling I mean. This one just happens to have turrets.

So here’s where the money went.

Two septic systems. One for the château and one for the coach house, both installed this spring, both completely invisible, both among the most expensive things on the property so far. When I wrote about the septic going in, I said that old buildings get restored from the inside out, with the invisible things going first. I meant it, and I still mean it, but I didn’t fully appreciate how it would feel to spend that kind of money on something whose entire job is to stay underground, never be thought about, and never be seen by anyone ever again. And all of this invisible work came with a bonus: the septic also took two of our prettiest stretches of lawn down with it, just in time for a summer of five heatwaves. We’ve been coaxing them back ever since (with mixed results).

An orange Doosan mini digger parked beside a long, freshly dug trench with pipes laid in it, in front of a stone coach house with arched windows and white shutters, surrounded by green trees in late afternoon light.
For about two months in spring, the digger was our most loyal houseguest.
Aerial view of a garden torn up for a septic installation: an orange digger at the end of a long trench, a large black tank set in gravel with a coil of yellow pipe on top, blue pipes running across the dirt, a stone outbuilding with brick arches on the left, a woman in a red skirt waving up at the camera, and a wooden swing set at the edge.
The coach house septic, from above. I’m the small, optimistic person on the left.

We’ve been editing our YouTube videos about the septic installation this month, which means I’ve spent several evenings rewatching a digger dig a hole. The installation was finished months ago, but watching it again was like flipping through the photo album of a very expensive year and finding that every single picture is of, well, dirt.

A deep rectangular excavation marked off with red and white tape in front of a cream château with white shutters and pointed slate turrets, with a tall mound of dirt beside it and blue pipes running into the trench.
The château, wearing a very large hole as an accessory.
View through a wooden window frame of two workmen fitting a large grey plastic septic tank on a lawn, with an orange mini digger and a flatbed truck behind them, and a small glass terrarium hanging in the window in the foreground.
The most expensive thing we bought this year, shortly before it disappeared underground forever.

There is no big reveal for a septic tank. Nobody plays the Fixer Upper music. Nobody walks into the back field and gasps in awe.

The coach house. It looks lovely, truly, and I’m very proud of the work we put into it. It’s cleaned and decorated and furnished down to the sheets and the teaspoons, and it has started earning a little money from guests, which helps. We just don’t live in it, so it’s a stretch to say we can fully enjoy the fruits of our labor. I go over sometimes to check on something and stand in a room I love, and then walk back to the château, where the radiators are still glaring at me, and the horror film lighting in our tiny galley kitchen is now flickering, just in time for Halloween.

The front of a long stone coach house with two large white arched carriage doors, arched windows framed in brick, and pink hydrangeas blooming along the wall, seen beneath the leafy branches of a large tree on a sunny day.
The Coach House - all done and welcoming guests.

The pool. It is October, and the pool is…a hole. A large chasm, if you will, surrounded by dirt.

It’s a very well-engineered hole. It has a concrete shell, and orange markers, and an air of great potential. It does not have a liner, or water, or a cover, or the travertine terrace I have been picturing in my head since (roughly) March.

Below: why the pool is still a hole (it involves a drought and a very long line of dominoes), the beautiful kitchen we said no to, and what all this invisible work actually costs in rural France.

Castle Diaries is my renovation journal for paid Supporting Members. Twice a month, I take you inside the château: the plans, the money and the decisions, as we make them.

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